1 | /* |
1 | /* |
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2 | * libev event processing core, watcher management |
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3 | * |
2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> |
3 | * All rights reserved. |
5 | * All rights reserved. |
4 | * |
6 | * |
5 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
6 | * modification, are permitted provided that the following conditions are |
8 | * tion, are permitted provided that the following conditions are met: |
7 | * met: |
9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
8 | * |
27 | * |
9 | * * Redistributions of source code must retain the above copyright |
28 | * Alternatively, the contents of this file may be used under the terms of |
10 | * notice, this list of conditions and the following disclaimer. |
29 | * the GNU General Public License ("GPL") version 2 or any later version, |
11 | * |
30 | * in which case the provisions of the GPL are applicable instead of |
12 | * * Redistributions in binary form must reproduce the above |
31 | * the above. If you wish to allow the use of your version of this file |
13 | * copyright notice, this list of conditions and the following |
32 | * only under the terms of the GPL and not to allow others to use your |
14 | * disclaimer in the documentation and/or other materials provided |
33 | * version of this file under the BSD license, indicate your decision |
15 | * with the distribution. |
34 | * by deleting the provisions above and replace them with the notice |
16 | * |
35 | * and other provisions required by the GPL. If you do not delete the |
17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
36 | * provisions above, a recipient may use your version of this file under |
18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
37 | * either the BSD or the GPL. |
19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
38 | */ |
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39 | |
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40 | /* this big block deduces configuration from config.h */ |
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41 | #ifndef EV_STANDALONE |
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42 | # ifdef EV_CONFIG_H |
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43 | # include EV_CONFIG_H |
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44 | # else |
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45 | # include "config.h" |
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46 | # endif |
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47 | |
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48 | # if HAVE_CLOCK_SYSCALL |
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49 | # ifndef EV_USE_CLOCK_SYSCALL |
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50 | # define EV_USE_CLOCK_SYSCALL 1 |
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51 | # ifndef EV_USE_REALTIME |
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52 | # define EV_USE_REALTIME 0 |
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53 | # endif |
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54 | # ifndef EV_USE_MONOTONIC |
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55 | # define EV_USE_MONOTONIC 1 |
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56 | # endif |
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57 | # endif |
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58 | # elif !defined(EV_USE_CLOCK_SYSCALL) |
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59 | # define EV_USE_CLOCK_SYSCALL 0 |
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60 | # endif |
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61 | |
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62 | # if HAVE_CLOCK_GETTIME |
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63 | # ifndef EV_USE_MONOTONIC |
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64 | # define EV_USE_MONOTONIC 1 |
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65 | # endif |
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66 | # ifndef EV_USE_REALTIME |
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67 | # define EV_USE_REALTIME 0 |
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68 | # endif |
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69 | # else |
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70 | # ifndef EV_USE_MONOTONIC |
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71 | # define EV_USE_MONOTONIC 0 |
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72 | # endif |
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73 | # ifndef EV_USE_REALTIME |
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74 | # define EV_USE_REALTIME 0 |
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75 | # endif |
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76 | # endif |
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77 | |
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78 | # if HAVE_NANOSLEEP |
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79 | # ifndef EV_USE_NANOSLEEP |
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80 | # define EV_USE_NANOSLEEP EV_FEATURE_OS |
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81 | # endif |
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82 | # else |
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83 | # undef EV_USE_NANOSLEEP |
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84 | # define EV_USE_NANOSLEEP 0 |
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85 | # endif |
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86 | |
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87 | # if HAVE_SELECT && HAVE_SYS_SELECT_H |
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88 | # ifndef EV_USE_SELECT |
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89 | # define EV_USE_SELECT EV_FEATURE_BACKENDS |
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90 | # endif |
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91 | # else |
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92 | # undef EV_USE_SELECT |
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93 | # define EV_USE_SELECT 0 |
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94 | # endif |
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95 | |
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96 | # if HAVE_POLL && HAVE_POLL_H |
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97 | # ifndef EV_USE_POLL |
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98 | # define EV_USE_POLL EV_FEATURE_BACKENDS |
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99 | # endif |
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100 | # else |
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101 | # undef EV_USE_POLL |
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102 | # define EV_USE_POLL 0 |
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103 | # endif |
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104 | |
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105 | # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H |
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106 | # ifndef EV_USE_EPOLL |
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107 | # define EV_USE_EPOLL EV_FEATURE_BACKENDS |
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108 | # endif |
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109 | # else |
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110 | # undef EV_USE_EPOLL |
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111 | # define EV_USE_EPOLL 0 |
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112 | # endif |
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113 | |
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114 | # if HAVE_KQUEUE && HAVE_SYS_EVENT_H |
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115 | # ifndef EV_USE_KQUEUE |
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116 | # define EV_USE_KQUEUE EV_FEATURE_BACKENDS |
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117 | # endif |
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118 | # else |
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119 | # undef EV_USE_KQUEUE |
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120 | # define EV_USE_KQUEUE 0 |
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121 | # endif |
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122 | |
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123 | # if HAVE_PORT_H && HAVE_PORT_CREATE |
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124 | # ifndef EV_USE_PORT |
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125 | # define EV_USE_PORT EV_FEATURE_BACKENDS |
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126 | # endif |
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127 | # else |
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128 | # undef EV_USE_PORT |
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129 | # define EV_USE_PORT 0 |
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130 | # endif |
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131 | |
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132 | # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H |
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133 | # ifndef EV_USE_INOTIFY |
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134 | # define EV_USE_INOTIFY EV_FEATURE_OS |
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135 | # endif |
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136 | # else |
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137 | # undef EV_USE_INOTIFY |
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138 | # define EV_USE_INOTIFY 0 |
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139 | # endif |
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140 | |
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141 | # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H |
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142 | # ifndef EV_USE_SIGNALFD |
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143 | # define EV_USE_SIGNALFD EV_FEATURE_OS |
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144 | # endif |
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145 | # else |
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146 | # undef EV_USE_SIGNALFD |
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147 | # define EV_USE_SIGNALFD 0 |
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148 | # endif |
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149 | |
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150 | # if HAVE_EVENTFD |
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151 | # ifndef EV_USE_EVENTFD |
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152 | # define EV_USE_EVENTFD EV_FEATURE_OS |
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153 | # endif |
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154 | # else |
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155 | # undef EV_USE_EVENTFD |
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156 | # define EV_USE_EVENTFD 0 |
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157 | # endif |
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158 | |
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159 | #endif |
29 | |
160 | |
30 | #include <math.h> |
161 | #include <math.h> |
31 | #include <stdlib.h> |
162 | #include <stdlib.h> |
32 | #include <unistd.h> |
163 | #include <string.h> |
33 | #include <fcntl.h> |
164 | #include <fcntl.h> |
34 | #include <signal.h> |
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35 | #include <stddef.h> |
165 | #include <stddef.h> |
36 | |
166 | |
37 | #include <stdio.h> |
167 | #include <stdio.h> |
38 | |
168 | |
39 | #include <assert.h> |
169 | #include <assert.h> |
40 | #include <errno.h> |
170 | #include <errno.h> |
41 | #include <sys/time.h> |
171 | #include <sys/types.h> |
42 | #include <time.h> |
172 | #include <time.h> |
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173 | #include <limits.h> |
43 | |
174 | |
44 | #ifndef HAVE_MONOTONIC |
175 | #include <signal.h> |
45 | # ifdef CLOCK_MONOTONIC |
176 | |
46 | # define HAVE_MONOTONIC 1 |
177 | #ifdef EV_H |
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178 | # include EV_H |
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179 | #else |
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180 | # include "ev.h" |
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181 | #endif |
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182 | |
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183 | EV_CPP(extern "C" {) |
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184 | |
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185 | #ifndef _WIN32 |
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186 | # include <sys/time.h> |
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187 | # include <sys/wait.h> |
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188 | # include <unistd.h> |
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189 | #else |
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190 | # include <io.h> |
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191 | # define WIN32_LEAN_AND_MEAN |
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192 | # include <windows.h> |
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193 | # ifndef EV_SELECT_IS_WINSOCKET |
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194 | # define EV_SELECT_IS_WINSOCKET 1 |
47 | # endif |
195 | # endif |
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196 | # undef EV_AVOID_STDIO |
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197 | #endif |
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198 | |
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199 | /* OS X, in its infinite idiocy, actually HARDCODES |
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200 | * a limit of 1024 into their select. Where people have brains, |
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201 | * OS X engineers apparently have a vacuum. Or maybe they were |
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202 | * ordered to have a vacuum, or they do anything for money. |
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203 | * This might help. Or not. |
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204 | */ |
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205 | #define _DARWIN_UNLIMITED_SELECT 1 |
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206 | |
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207 | /* this block tries to deduce configuration from header-defined symbols and defaults */ |
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208 | |
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209 | /* try to deduce the maximum number of signals on this platform */ |
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210 | #if defined (EV_NSIG) |
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211 | /* use what's provided */ |
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212 | #elif defined (NSIG) |
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213 | # define EV_NSIG (NSIG) |
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214 | #elif defined(_NSIG) |
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215 | # define EV_NSIG (_NSIG) |
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216 | #elif defined (SIGMAX) |
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217 | # define EV_NSIG (SIGMAX+1) |
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218 | #elif defined (SIG_MAX) |
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219 | # define EV_NSIG (SIG_MAX+1) |
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220 | #elif defined (_SIG_MAX) |
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221 | # define EV_NSIG (_SIG_MAX+1) |
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222 | #elif defined (MAXSIG) |
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223 | # define EV_NSIG (MAXSIG+1) |
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224 | #elif defined (MAX_SIG) |
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225 | # define EV_NSIG (MAX_SIG+1) |
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226 | #elif defined (SIGARRAYSIZE) |
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227 | # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ |
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228 | #elif defined (_sys_nsig) |
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229 | # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ |
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230 | #else |
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231 | # error "unable to find value for NSIG, please report" |
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232 | /* to make it compile regardless, just remove the above line, */ |
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233 | /* but consider reporting it, too! :) */ |
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234 | # define EV_NSIG 65 |
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235 | #endif |
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236 | |
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237 | #ifndef EV_USE_CLOCK_SYSCALL |
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238 | # if __linux && __GLIBC__ >= 2 |
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239 | # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS |
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240 | # else |
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241 | # define EV_USE_CLOCK_SYSCALL 0 |
48 | #endif |
242 | # endif |
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243 | #endif |
49 | |
244 | |
50 | #ifndef HAVE_SELECT |
245 | #ifndef EV_USE_MONOTONIC |
51 | # define HAVE_SELECT 1 |
246 | # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 |
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247 | # define EV_USE_MONOTONIC EV_FEATURE_OS |
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248 | # else |
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249 | # define EV_USE_MONOTONIC 0 |
52 | #endif |
250 | # endif |
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251 | #endif |
53 | |
252 | |
54 | #ifndef HAVE_EPOLL |
253 | #ifndef EV_USE_REALTIME |
55 | # define HAVE_EPOLL 0 |
254 | # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL |
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255 | #endif |
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256 | |
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257 | #ifndef EV_USE_NANOSLEEP |
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258 | # if _POSIX_C_SOURCE >= 199309L |
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259 | # define EV_USE_NANOSLEEP EV_FEATURE_OS |
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260 | # else |
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261 | # define EV_USE_NANOSLEEP 0 |
56 | #endif |
262 | # endif |
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263 | #endif |
57 | |
264 | |
58 | #ifndef HAVE_REALTIME |
265 | #ifndef EV_USE_SELECT |
59 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
266 | # define EV_USE_SELECT EV_FEATURE_BACKENDS |
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267 | #endif |
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268 | |
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269 | #ifndef EV_USE_POLL |
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270 | # ifdef _WIN32 |
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271 | # define EV_USE_POLL 0 |
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272 | # else |
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273 | # define EV_USE_POLL EV_FEATURE_BACKENDS |
60 | #endif |
274 | # endif |
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275 | #endif |
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276 | |
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277 | #ifndef EV_USE_EPOLL |
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278 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) |
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279 | # define EV_USE_EPOLL EV_FEATURE_BACKENDS |
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280 | # else |
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281 | # define EV_USE_EPOLL 0 |
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282 | # endif |
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283 | #endif |
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284 | |
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285 | #ifndef EV_USE_KQUEUE |
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286 | # define EV_USE_KQUEUE 0 |
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287 | #endif |
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288 | |
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289 | #ifndef EV_USE_PORT |
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290 | # define EV_USE_PORT 0 |
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291 | #endif |
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292 | |
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293 | #ifndef EV_USE_INOTIFY |
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294 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) |
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295 | # define EV_USE_INOTIFY EV_FEATURE_OS |
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296 | # else |
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297 | # define EV_USE_INOTIFY 0 |
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298 | # endif |
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299 | #endif |
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300 | |
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301 | #ifndef EV_PID_HASHSIZE |
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302 | # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1 |
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303 | #endif |
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304 | |
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305 | #ifndef EV_INOTIFY_HASHSIZE |
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306 | # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1 |
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307 | #endif |
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308 | |
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309 | #ifndef EV_USE_EVENTFD |
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310 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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311 | # define EV_USE_EVENTFD EV_FEATURE_OS |
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312 | # else |
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313 | # define EV_USE_EVENTFD 0 |
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314 | # endif |
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315 | #endif |
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316 | |
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317 | #ifndef EV_USE_SIGNALFD |
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318 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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319 | # define EV_USE_SIGNALFD EV_FEATURE_OS |
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320 | # else |
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321 | # define EV_USE_SIGNALFD 0 |
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322 | # endif |
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323 | #endif |
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324 | |
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325 | #if 0 /* debugging */ |
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326 | # define EV_VERIFY 3 |
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327 | # define EV_USE_4HEAP 1 |
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328 | # define EV_HEAP_CACHE_AT 1 |
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329 | #endif |
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330 | |
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331 | #ifndef EV_VERIFY |
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332 | # define EV_VERIFY (EV_FEATURE_API ? 1 : 0) |
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333 | #endif |
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334 | |
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335 | #ifndef EV_USE_4HEAP |
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336 | # define EV_USE_4HEAP EV_FEATURE_DATA |
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337 | #endif |
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338 | |
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339 | #ifndef EV_HEAP_CACHE_AT |
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340 | # define EV_HEAP_CACHE_AT EV_FEATURE_DATA |
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341 | #endif |
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342 | |
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343 | /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ |
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344 | /* which makes programs even slower. might work on other unices, too. */ |
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345 | #if EV_USE_CLOCK_SYSCALL |
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346 | # include <syscall.h> |
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347 | # ifdef SYS_clock_gettime |
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348 | # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) |
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349 | # undef EV_USE_MONOTONIC |
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350 | # define EV_USE_MONOTONIC 1 |
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351 | # else |
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352 | # undef EV_USE_CLOCK_SYSCALL |
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353 | # define EV_USE_CLOCK_SYSCALL 0 |
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354 | # endif |
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355 | #endif |
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356 | |
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357 | /* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
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358 | |
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359 | #ifdef _AIX |
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360 | /* AIX has a completely broken poll.h header */ |
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361 | # undef EV_USE_POLL |
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362 | # define EV_USE_POLL 0 |
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363 | #endif |
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364 | |
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365 | #ifndef CLOCK_MONOTONIC |
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366 | # undef EV_USE_MONOTONIC |
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367 | # define EV_USE_MONOTONIC 0 |
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368 | #endif |
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369 | |
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370 | #ifndef CLOCK_REALTIME |
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371 | # undef EV_USE_REALTIME |
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372 | # define EV_USE_REALTIME 0 |
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373 | #endif |
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374 | |
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375 | #if !EV_STAT_ENABLE |
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376 | # undef EV_USE_INOTIFY |
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377 | # define EV_USE_INOTIFY 0 |
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378 | #endif |
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379 | |
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380 | #if !EV_USE_NANOSLEEP |
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381 | # ifndef _WIN32 |
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382 | # include <sys/select.h> |
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383 | # endif |
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384 | #endif |
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385 | |
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386 | #if EV_USE_INOTIFY |
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387 | # include <sys/statfs.h> |
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388 | # include <sys/inotify.h> |
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389 | /* some very old inotify.h headers don't have IN_DONT_FOLLOW */ |
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390 | # ifndef IN_DONT_FOLLOW |
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391 | # undef EV_USE_INOTIFY |
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392 | # define EV_USE_INOTIFY 0 |
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393 | # endif |
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394 | #endif |
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395 | |
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396 | #if EV_SELECT_IS_WINSOCKET |
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397 | # include <winsock.h> |
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398 | #endif |
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399 | |
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400 | #if EV_USE_EVENTFD |
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401 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
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402 | # include <stdint.h> |
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403 | # ifndef EFD_NONBLOCK |
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404 | # define EFD_NONBLOCK O_NONBLOCK |
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405 | # endif |
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406 | # ifndef EFD_CLOEXEC |
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407 | # ifdef O_CLOEXEC |
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408 | # define EFD_CLOEXEC O_CLOEXEC |
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409 | # else |
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410 | # define EFD_CLOEXEC 02000000 |
|
|
411 | # endif |
|
|
412 | # endif |
|
|
413 | EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags); |
|
|
414 | #endif |
|
|
415 | |
|
|
416 | #if EV_USE_SIGNALFD |
|
|
417 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
|
|
418 | # include <stdint.h> |
|
|
419 | # ifndef SFD_NONBLOCK |
|
|
420 | # define SFD_NONBLOCK O_NONBLOCK |
|
|
421 | # endif |
|
|
422 | # ifndef SFD_CLOEXEC |
|
|
423 | # ifdef O_CLOEXEC |
|
|
424 | # define SFD_CLOEXEC O_CLOEXEC |
|
|
425 | # else |
|
|
426 | # define SFD_CLOEXEC 02000000 |
|
|
427 | # endif |
|
|
428 | # endif |
|
|
429 | EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags); |
|
|
430 | |
|
|
431 | struct signalfd_siginfo |
|
|
432 | { |
|
|
433 | uint32_t ssi_signo; |
|
|
434 | char pad[128 - sizeof (uint32_t)]; |
|
|
435 | }; |
|
|
436 | #endif |
|
|
437 | |
|
|
438 | /**/ |
|
|
439 | |
|
|
440 | #if EV_VERIFY >= 3 |
|
|
441 | # define EV_FREQUENT_CHECK ev_verify (EV_A) |
|
|
442 | #else |
|
|
443 | # define EV_FREQUENT_CHECK do { } while (0) |
|
|
444 | #endif |
|
|
445 | |
|
|
446 | /* |
|
|
447 | * This is used to avoid floating point rounding problems. |
|
|
448 | * It is added to ev_rt_now when scheduling periodics |
|
|
449 | * to ensure progress, time-wise, even when rounding |
|
|
450 | * errors are against us. |
|
|
451 | * This value is good at least till the year 4000. |
|
|
452 | * Better solutions welcome. |
|
|
453 | */ |
|
|
454 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
61 | |
455 | |
62 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
456 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
63 | #define MAX_BLOCKTIME 60. |
457 | #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
64 | |
458 | |
65 | #include "ev.h" |
459 | #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) |
|
|
460 | #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) |
66 | |
461 | |
|
|
462 | #if __GNUC__ >= 4 |
|
|
463 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
|
|
464 | # define noinline __attribute__ ((noinline)) |
|
|
465 | #else |
|
|
466 | # define expect(expr,value) (expr) |
|
|
467 | # define noinline |
|
|
468 | # if __STDC_VERSION__ < 199901L && __GNUC__ < 2 |
|
|
469 | # define inline |
|
|
470 | # endif |
|
|
471 | #endif |
|
|
472 | |
|
|
473 | #define expect_false(expr) expect ((expr) != 0, 0) |
|
|
474 | #define expect_true(expr) expect ((expr) != 0, 1) |
|
|
475 | #define inline_size static inline |
|
|
476 | |
|
|
477 | #if EV_FEATURE_CODE |
|
|
478 | # define inline_speed static inline |
|
|
479 | #else |
|
|
480 | # define inline_speed static noinline |
|
|
481 | #endif |
|
|
482 | |
|
|
483 | #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
|
|
484 | |
|
|
485 | #if EV_MINPRI == EV_MAXPRI |
|
|
486 | # define ABSPRI(w) (((W)w), 0) |
|
|
487 | #else |
|
|
488 | # define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
|
|
489 | #endif |
|
|
490 | |
|
|
491 | #define EMPTY /* required for microsofts broken pseudo-c compiler */ |
|
|
492 | #define EMPTY2(a,b) /* used to suppress some warnings */ |
|
|
493 | |
67 | typedef struct ev_watcher *W; |
494 | typedef ev_watcher *W; |
68 | typedef struct ev_watcher_list *WL; |
495 | typedef ev_watcher_list *WL; |
69 | typedef struct ev_watcher_time *WT; |
496 | typedef ev_watcher_time *WT; |
70 | |
497 | |
71 | static ev_tstamp now, diff; /* monotonic clock */ |
498 | #define ev_active(w) ((W)(w))->active |
72 | ev_tstamp ev_now; |
499 | #define ev_at(w) ((WT)(w))->at |
73 | int ev_method; |
|
|
74 | |
500 | |
75 | static int have_monotonic; /* runtime */ |
501 | #if EV_USE_REALTIME |
|
|
502 | /* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
|
|
503 | /* giving it a reasonably high chance of working on typical architectures */ |
|
|
504 | static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
|
|
505 | #endif |
76 | |
506 | |
77 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
507 | #if EV_USE_MONOTONIC |
78 | static void (*method_modify)(int fd, int oev, int nev); |
508 | static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
79 | static void (*method_poll)(ev_tstamp timeout); |
509 | #endif |
|
|
510 | |
|
|
511 | #ifndef EV_FD_TO_WIN32_HANDLE |
|
|
512 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
|
|
513 | #endif |
|
|
514 | #ifndef EV_WIN32_HANDLE_TO_FD |
|
|
515 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
|
|
516 | #endif |
|
|
517 | #ifndef EV_WIN32_CLOSE_FD |
|
|
518 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
|
|
519 | #endif |
|
|
520 | |
|
|
521 | #ifdef _WIN32 |
|
|
522 | # include "ev_win32.c" |
|
|
523 | #endif |
80 | |
524 | |
81 | /*****************************************************************************/ |
525 | /*****************************************************************************/ |
82 | |
526 | |
|
|
527 | #ifdef __linux |
|
|
528 | # include <sys/utsname.h> |
|
|
529 | #endif |
|
|
530 | |
|
|
531 | static unsigned int noinline |
|
|
532 | ev_linux_version (void) |
|
|
533 | { |
|
|
534 | #ifdef __linux |
|
|
535 | unsigned int v = 0; |
|
|
536 | struct utsname buf; |
|
|
537 | int i; |
|
|
538 | char *p = buf.release; |
|
|
539 | |
|
|
540 | if (uname (&buf)) |
|
|
541 | return 0; |
|
|
542 | |
|
|
543 | for (i = 3+1; --i; ) |
|
|
544 | { |
|
|
545 | unsigned int c = 0; |
|
|
546 | |
|
|
547 | for (;;) |
|
|
548 | { |
|
|
549 | if (*p >= '0' && *p <= '9') |
|
|
550 | c = c * 10 + *p++ - '0'; |
|
|
551 | else |
|
|
552 | { |
|
|
553 | p += *p == '.'; |
|
|
554 | break; |
|
|
555 | } |
|
|
556 | } |
|
|
557 | |
|
|
558 | v = (v << 8) | c; |
|
|
559 | } |
|
|
560 | |
|
|
561 | return v; |
|
|
562 | #else |
|
|
563 | return 0; |
|
|
564 | #endif |
|
|
565 | } |
|
|
566 | |
|
|
567 | /*****************************************************************************/ |
|
|
568 | |
|
|
569 | #if EV_AVOID_STDIO |
|
|
570 | static void noinline |
|
|
571 | ev_printerr (const char *msg) |
|
|
572 | { |
|
|
573 | write (STDERR_FILENO, msg, strlen (msg)); |
|
|
574 | } |
|
|
575 | #endif |
|
|
576 | |
|
|
577 | static void (*syserr_cb)(const char *msg); |
|
|
578 | |
|
|
579 | void |
|
|
580 | ev_set_syserr_cb (void (*cb)(const char *msg)) |
|
|
581 | { |
|
|
582 | syserr_cb = cb; |
|
|
583 | } |
|
|
584 | |
|
|
585 | static void noinline |
|
|
586 | ev_syserr (const char *msg) |
|
|
587 | { |
|
|
588 | if (!msg) |
|
|
589 | msg = "(libev) system error"; |
|
|
590 | |
|
|
591 | if (syserr_cb) |
|
|
592 | syserr_cb (msg); |
|
|
593 | else |
|
|
594 | { |
|
|
595 | #if EV_AVOID_STDIO |
|
|
596 | ev_printerr (msg); |
|
|
597 | ev_printerr (": "); |
|
|
598 | ev_printerr (strerror (errno)); |
|
|
599 | ev_printerr ("\n"); |
|
|
600 | #else |
|
|
601 | perror (msg); |
|
|
602 | #endif |
|
|
603 | abort (); |
|
|
604 | } |
|
|
605 | } |
|
|
606 | |
|
|
607 | static void * |
|
|
608 | ev_realloc_emul (void *ptr, long size) |
|
|
609 | { |
|
|
610 | #if __GLIBC__ |
|
|
611 | return realloc (ptr, size); |
|
|
612 | #else |
|
|
613 | /* some systems, notably openbsd and darwin, fail to properly |
|
|
614 | * implement realloc (x, 0) (as required by both ansi c-89 and |
|
|
615 | * the single unix specification, so work around them here. |
|
|
616 | */ |
|
|
617 | |
|
|
618 | if (size) |
|
|
619 | return realloc (ptr, size); |
|
|
620 | |
|
|
621 | free (ptr); |
|
|
622 | return 0; |
|
|
623 | #endif |
|
|
624 | } |
|
|
625 | |
|
|
626 | static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; |
|
|
627 | |
|
|
628 | void |
|
|
629 | ev_set_allocator (void *(*cb)(void *ptr, long size)) |
|
|
630 | { |
|
|
631 | alloc = cb; |
|
|
632 | } |
|
|
633 | |
|
|
634 | inline_speed void * |
|
|
635 | ev_realloc (void *ptr, long size) |
|
|
636 | { |
|
|
637 | ptr = alloc (ptr, size); |
|
|
638 | |
|
|
639 | if (!ptr && size) |
|
|
640 | { |
|
|
641 | #if EV_AVOID_STDIO |
|
|
642 | ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
|
|
643 | #else |
|
|
644 | fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
|
|
645 | #endif |
|
|
646 | abort (); |
|
|
647 | } |
|
|
648 | |
|
|
649 | return ptr; |
|
|
650 | } |
|
|
651 | |
|
|
652 | #define ev_malloc(size) ev_realloc (0, (size)) |
|
|
653 | #define ev_free(ptr) ev_realloc ((ptr), 0) |
|
|
654 | |
|
|
655 | /*****************************************************************************/ |
|
|
656 | |
|
|
657 | /* set in reify when reification needed */ |
|
|
658 | #define EV_ANFD_REIFY 1 |
|
|
659 | |
|
|
660 | /* file descriptor info structure */ |
|
|
661 | typedef struct |
|
|
662 | { |
|
|
663 | WL head; |
|
|
664 | unsigned char events; /* the events watched for */ |
|
|
665 | unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ |
|
|
666 | unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ |
|
|
667 | unsigned char unused; |
|
|
668 | #if EV_USE_EPOLL |
|
|
669 | unsigned int egen; /* generation counter to counter epoll bugs */ |
|
|
670 | #endif |
|
|
671 | #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
|
|
672 | SOCKET handle; |
|
|
673 | #endif |
|
|
674 | #if EV_USE_IOCP |
|
|
675 | OVERLAPPED or, ow; |
|
|
676 | #endif |
|
|
677 | } ANFD; |
|
|
678 | |
|
|
679 | /* stores the pending event set for a given watcher */ |
|
|
680 | typedef struct |
|
|
681 | { |
|
|
682 | W w; |
|
|
683 | int events; /* the pending event set for the given watcher */ |
|
|
684 | } ANPENDING; |
|
|
685 | |
|
|
686 | #if EV_USE_INOTIFY |
|
|
687 | /* hash table entry per inotify-id */ |
|
|
688 | typedef struct |
|
|
689 | { |
|
|
690 | WL head; |
|
|
691 | } ANFS; |
|
|
692 | #endif |
|
|
693 | |
|
|
694 | /* Heap Entry */ |
|
|
695 | #if EV_HEAP_CACHE_AT |
|
|
696 | /* a heap element */ |
|
|
697 | typedef struct { |
|
|
698 | ev_tstamp at; |
|
|
699 | WT w; |
|
|
700 | } ANHE; |
|
|
701 | |
|
|
702 | #define ANHE_w(he) (he).w /* access watcher, read-write */ |
|
|
703 | #define ANHE_at(he) (he).at /* access cached at, read-only */ |
|
|
704 | #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ |
|
|
705 | #else |
|
|
706 | /* a heap element */ |
|
|
707 | typedef WT ANHE; |
|
|
708 | |
|
|
709 | #define ANHE_w(he) (he) |
|
|
710 | #define ANHE_at(he) (he)->at |
|
|
711 | #define ANHE_at_cache(he) |
|
|
712 | #endif |
|
|
713 | |
|
|
714 | #if EV_MULTIPLICITY |
|
|
715 | |
|
|
716 | struct ev_loop |
|
|
717 | { |
|
|
718 | ev_tstamp ev_rt_now; |
|
|
719 | #define ev_rt_now ((loop)->ev_rt_now) |
|
|
720 | #define VAR(name,decl) decl; |
|
|
721 | #include "ev_vars.h" |
|
|
722 | #undef VAR |
|
|
723 | }; |
|
|
724 | #include "ev_wrap.h" |
|
|
725 | |
|
|
726 | static struct ev_loop default_loop_struct; |
|
|
727 | struct ev_loop *ev_default_loop_ptr; |
|
|
728 | |
|
|
729 | #else |
|
|
730 | |
|
|
731 | ev_tstamp ev_rt_now; |
|
|
732 | #define VAR(name,decl) static decl; |
|
|
733 | #include "ev_vars.h" |
|
|
734 | #undef VAR |
|
|
735 | |
|
|
736 | static int ev_default_loop_ptr; |
|
|
737 | |
|
|
738 | #endif |
|
|
739 | |
|
|
740 | #if EV_FEATURE_API |
|
|
741 | # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) |
|
|
742 | # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) |
|
|
743 | # define EV_INVOKE_PENDING invoke_cb (EV_A) |
|
|
744 | #else |
|
|
745 | # define EV_RELEASE_CB (void)0 |
|
|
746 | # define EV_ACQUIRE_CB (void)0 |
|
|
747 | # define EV_INVOKE_PENDING ev_invoke_pending (EV_A) |
|
|
748 | #endif |
|
|
749 | |
|
|
750 | #define EVBREAK_RECURSE 0x80 |
|
|
751 | |
|
|
752 | /*****************************************************************************/ |
|
|
753 | |
|
|
754 | #ifndef EV_HAVE_EV_TIME |
83 | ev_tstamp |
755 | ev_tstamp |
84 | ev_time (void) |
756 | ev_time (void) |
85 | { |
757 | { |
86 | #if HAVE_REALTIME |
758 | #if EV_USE_REALTIME |
|
|
759 | if (expect_true (have_realtime)) |
|
|
760 | { |
87 | struct timespec ts; |
761 | struct timespec ts; |
88 | clock_gettime (CLOCK_REALTIME, &ts); |
762 | clock_gettime (CLOCK_REALTIME, &ts); |
89 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
763 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
90 | #else |
764 | } |
|
|
765 | #endif |
|
|
766 | |
91 | struct timeval tv; |
767 | struct timeval tv; |
92 | gettimeofday (&tv, 0); |
768 | gettimeofday (&tv, 0); |
93 | return tv.tv_sec + tv.tv_usec * 1e-6; |
769 | return tv.tv_sec + tv.tv_usec * 1e-6; |
94 | #endif |
|
|
95 | } |
770 | } |
|
|
771 | #endif |
96 | |
772 | |
97 | static ev_tstamp |
773 | inline_size ev_tstamp |
98 | get_clock (void) |
774 | get_clock (void) |
99 | { |
775 | { |
100 | #if HAVE_MONOTONIC |
776 | #if EV_USE_MONOTONIC |
101 | if (have_monotonic) |
777 | if (expect_true (have_monotonic)) |
102 | { |
778 | { |
103 | struct timespec ts; |
779 | struct timespec ts; |
104 | clock_gettime (CLOCK_MONOTONIC, &ts); |
780 | clock_gettime (CLOCK_MONOTONIC, &ts); |
105 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
781 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
106 | } |
782 | } |
107 | #endif |
783 | #endif |
108 | |
784 | |
109 | return ev_time (); |
785 | return ev_time (); |
110 | } |
786 | } |
111 | |
787 | |
112 | #define array_needsize(base,cur,cnt,init) \ |
788 | #if EV_MULTIPLICITY |
113 | if ((cnt) > cur) \ |
789 | ev_tstamp |
114 | { \ |
790 | ev_now (EV_P) |
115 | int newcnt = cur ? cur << 1 : 16; \ |
791 | { |
116 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
792 | return ev_rt_now; |
117 | init (base + cur, newcnt - cur); \ |
793 | } |
118 | cur = newcnt; \ |
794 | #endif |
|
|
795 | |
|
|
796 | void |
|
|
797 | ev_sleep (ev_tstamp delay) |
|
|
798 | { |
|
|
799 | if (delay > 0.) |
119 | } |
800 | { |
|
|
801 | #if EV_USE_NANOSLEEP |
|
|
802 | struct timespec ts; |
|
|
803 | |
|
|
804 | EV_TS_SET (ts, delay); |
|
|
805 | nanosleep (&ts, 0); |
|
|
806 | #elif defined(_WIN32) |
|
|
807 | Sleep ((unsigned long)(delay * 1e3)); |
|
|
808 | #else |
|
|
809 | struct timeval tv; |
|
|
810 | |
|
|
811 | /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ |
|
|
812 | /* something not guaranteed by newer posix versions, but guaranteed */ |
|
|
813 | /* by older ones */ |
|
|
814 | EV_TV_SET (tv, delay); |
|
|
815 | select (0, 0, 0, 0, &tv); |
|
|
816 | #endif |
|
|
817 | } |
|
|
818 | } |
|
|
819 | |
|
|
820 | inline_speed int |
|
|
821 | ev_timeout_to_ms (ev_tstamp timeout) |
|
|
822 | { |
|
|
823 | int ms = timeout * 1000. + .999999; |
|
|
824 | |
|
|
825 | return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1; |
|
|
826 | } |
120 | |
827 | |
121 | /*****************************************************************************/ |
828 | /*****************************************************************************/ |
122 | |
829 | |
123 | typedef struct |
830 | #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
124 | { |
|
|
125 | struct ev_io *head; |
|
|
126 | unsigned char wev, rev; /* want, received event set */ |
|
|
127 | } ANFD; |
|
|
128 | |
831 | |
129 | static ANFD *anfds; |
832 | /* find a suitable new size for the given array, */ |
130 | static int anfdmax; |
833 | /* hopefully by rounding to a nice-to-malloc size */ |
131 | |
834 | inline_size int |
132 | static int *fdchanges; |
835 | array_nextsize (int elem, int cur, int cnt) |
133 | static int fdchangemax, fdchangecnt; |
|
|
134 | |
|
|
135 | static void |
|
|
136 | anfds_init (ANFD *base, int count) |
|
|
137 | { |
836 | { |
138 | while (count--) |
837 | int ncur = cur + 1; |
139 | { |
838 | |
140 | base->head = 0; |
839 | do |
141 | base->wev = base->rev = EV_NONE; |
840 | ncur <<= 1; |
142 | ++base; |
841 | while (cnt > ncur); |
|
|
842 | |
|
|
843 | /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ |
|
|
844 | if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) |
143 | } |
845 | { |
144 | } |
846 | ncur *= elem; |
145 | |
847 | ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); |
146 | typedef struct |
848 | ncur = ncur - sizeof (void *) * 4; |
147 | { |
849 | ncur /= elem; |
148 | W w; |
|
|
149 | int events; |
|
|
150 | } ANPENDING; |
|
|
151 | |
|
|
152 | static ANPENDING *pendings; |
|
|
153 | static int pendingmax, pendingcnt; |
|
|
154 | |
|
|
155 | static void |
|
|
156 | event (W w, int events) |
|
|
157 | { |
|
|
158 | if (w->active) |
|
|
159 | { |
850 | } |
|
|
851 | |
|
|
852 | return ncur; |
|
|
853 | } |
|
|
854 | |
|
|
855 | static noinline void * |
|
|
856 | array_realloc (int elem, void *base, int *cur, int cnt) |
|
|
857 | { |
|
|
858 | *cur = array_nextsize (elem, *cur, cnt); |
|
|
859 | return ev_realloc (base, elem * *cur); |
|
|
860 | } |
|
|
861 | |
|
|
862 | #define array_init_zero(base,count) \ |
|
|
863 | memset ((void *)(base), 0, sizeof (*(base)) * (count)) |
|
|
864 | |
|
|
865 | #define array_needsize(type,base,cur,cnt,init) \ |
|
|
866 | if (expect_false ((cnt) > (cur))) \ |
|
|
867 | { \ |
|
|
868 | int ocur_ = (cur); \ |
|
|
869 | (base) = (type *)array_realloc \ |
|
|
870 | (sizeof (type), (base), &(cur), (cnt)); \ |
|
|
871 | init ((base) + (ocur_), (cur) - ocur_); \ |
|
|
872 | } |
|
|
873 | |
|
|
874 | #if 0 |
|
|
875 | #define array_slim(type,stem) \ |
|
|
876 | if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
|
|
877 | { \ |
|
|
878 | stem ## max = array_roundsize (stem ## cnt >> 1); \ |
|
|
879 | base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
|
|
880 | fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
|
|
881 | } |
|
|
882 | #endif |
|
|
883 | |
|
|
884 | #define array_free(stem, idx) \ |
|
|
885 | ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 |
|
|
886 | |
|
|
887 | /*****************************************************************************/ |
|
|
888 | |
|
|
889 | /* dummy callback for pending events */ |
|
|
890 | static void noinline |
|
|
891 | pendingcb (EV_P_ ev_prepare *w, int revents) |
|
|
892 | { |
|
|
893 | } |
|
|
894 | |
|
|
895 | void noinline |
|
|
896 | ev_feed_event (EV_P_ void *w, int revents) |
|
|
897 | { |
|
|
898 | W w_ = (W)w; |
|
|
899 | int pri = ABSPRI (w_); |
|
|
900 | |
|
|
901 | if (expect_false (w_->pending)) |
|
|
902 | pendings [pri][w_->pending - 1].events |= revents; |
|
|
903 | else |
|
|
904 | { |
160 | w->pending = ++pendingcnt; |
905 | w_->pending = ++pendingcnt [pri]; |
161 | array_needsize (pendings, pendingmax, pendingcnt, ); |
906 | array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
162 | pendings [pendingcnt - 1].w = w; |
907 | pendings [pri][w_->pending - 1].w = w_; |
163 | pendings [pendingcnt - 1].events = events; |
908 | pendings [pri][w_->pending - 1].events = revents; |
164 | } |
909 | } |
165 | } |
910 | } |
166 | |
911 | |
167 | static void |
912 | inline_speed void |
|
|
913 | feed_reverse (EV_P_ W w) |
|
|
914 | { |
|
|
915 | array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); |
|
|
916 | rfeeds [rfeedcnt++] = w; |
|
|
917 | } |
|
|
918 | |
|
|
919 | inline_size void |
|
|
920 | feed_reverse_done (EV_P_ int revents) |
|
|
921 | { |
|
|
922 | do |
|
|
923 | ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); |
|
|
924 | while (rfeedcnt); |
|
|
925 | } |
|
|
926 | |
|
|
927 | inline_speed void |
|
|
928 | queue_events (EV_P_ W *events, int eventcnt, int type) |
|
|
929 | { |
|
|
930 | int i; |
|
|
931 | |
|
|
932 | for (i = 0; i < eventcnt; ++i) |
|
|
933 | ev_feed_event (EV_A_ events [i], type); |
|
|
934 | } |
|
|
935 | |
|
|
936 | /*****************************************************************************/ |
|
|
937 | |
|
|
938 | inline_speed void |
168 | fd_event (int fd, int events) |
939 | fd_event_nocheck (EV_P_ int fd, int revents) |
169 | { |
940 | { |
170 | ANFD *anfd = anfds + fd; |
941 | ANFD *anfd = anfds + fd; |
171 | struct ev_io *w; |
942 | ev_io *w; |
172 | |
943 | |
173 | for (w = anfd->head; w; w = w->next) |
944 | for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
174 | { |
945 | { |
175 | int ev = w->events & events; |
946 | int ev = w->events & revents; |
176 | |
947 | |
177 | if (ev) |
948 | if (ev) |
178 | event ((W)w, ev); |
949 | ev_feed_event (EV_A_ (W)w, ev); |
179 | } |
|
|
180 | } |
|
|
181 | |
|
|
182 | static void |
|
|
183 | queue_events (W *events, int eventcnt, int type) |
|
|
184 | { |
|
|
185 | int i; |
|
|
186 | |
|
|
187 | for (i = 0; i < eventcnt; ++i) |
|
|
188 | event (events [i], type); |
|
|
189 | } |
|
|
190 | |
|
|
191 | /* called on EBADF to verify fds */ |
|
|
192 | static void |
|
|
193 | fd_recheck () |
|
|
194 | { |
|
|
195 | int fd; |
|
|
196 | |
|
|
197 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
198 | if (anfds [fd].wev) |
|
|
199 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
|
|
200 | while (anfds [fd].head) |
|
|
201 | evio_stop (anfds [fd].head); |
|
|
202 | } |
|
|
203 | |
|
|
204 | /*****************************************************************************/ |
|
|
205 | |
|
|
206 | static struct ev_timer **timers; |
|
|
207 | static int timermax, timercnt; |
|
|
208 | |
|
|
209 | static struct ev_periodic **periodics; |
|
|
210 | static int periodicmax, periodiccnt; |
|
|
211 | |
|
|
212 | static void |
|
|
213 | upheap (WT *timers, int k) |
|
|
214 | { |
|
|
215 | WT w = timers [k]; |
|
|
216 | |
|
|
217 | while (k && timers [k >> 1]->at > w->at) |
|
|
218 | { |
|
|
219 | timers [k] = timers [k >> 1]; |
|
|
220 | timers [k]->active = k + 1; |
|
|
221 | k >>= 1; |
|
|
222 | } |
|
|
223 | |
|
|
224 | timers [k] = w; |
|
|
225 | timers [k]->active = k + 1; |
|
|
226 | |
|
|
227 | } |
|
|
228 | |
|
|
229 | static void |
|
|
230 | downheap (WT *timers, int N, int k) |
|
|
231 | { |
|
|
232 | WT w = timers [k]; |
|
|
233 | |
|
|
234 | while (k < (N >> 1)) |
|
|
235 | { |
|
|
236 | int j = k << 1; |
|
|
237 | |
|
|
238 | if (j + 1 < N && timers [j]->at > timers [j + 1]->at) |
|
|
239 | ++j; |
|
|
240 | |
|
|
241 | if (w->at <= timers [j]->at) |
|
|
242 | break; |
|
|
243 | |
|
|
244 | timers [k] = timers [j]; |
|
|
245 | timers [k]->active = k + 1; |
|
|
246 | k = j; |
|
|
247 | } |
|
|
248 | |
|
|
249 | timers [k] = w; |
|
|
250 | timers [k]->active = k + 1; |
|
|
251 | } |
|
|
252 | |
|
|
253 | /*****************************************************************************/ |
|
|
254 | |
|
|
255 | typedef struct |
|
|
256 | { |
|
|
257 | struct ev_signal *head; |
|
|
258 | sig_atomic_t gotsig; |
|
|
259 | } ANSIG; |
|
|
260 | |
|
|
261 | static ANSIG *signals; |
|
|
262 | static int signalmax; |
|
|
263 | |
|
|
264 | static int sigpipe [2]; |
|
|
265 | static sig_atomic_t gotsig; |
|
|
266 | static struct ev_io sigev; |
|
|
267 | |
|
|
268 | static void |
|
|
269 | signals_init (ANSIG *base, int count) |
|
|
270 | { |
|
|
271 | while (count--) |
|
|
272 | { |
|
|
273 | base->head = 0; |
|
|
274 | base->gotsig = 0; |
|
|
275 | ++base; |
|
|
276 | } |
|
|
277 | } |
|
|
278 | |
|
|
279 | static void |
|
|
280 | sighandler (int signum) |
|
|
281 | { |
|
|
282 | signals [signum - 1].gotsig = 1; |
|
|
283 | |
|
|
284 | if (!gotsig) |
|
|
285 | { |
|
|
286 | gotsig = 1; |
|
|
287 | write (sigpipe [1], &gotsig, 1); |
|
|
288 | } |
|
|
289 | } |
|
|
290 | |
|
|
291 | static void |
|
|
292 | sigcb (struct ev_io *iow, int revents) |
|
|
293 | { |
|
|
294 | struct ev_signal *w; |
|
|
295 | int sig; |
|
|
296 | |
|
|
297 | gotsig = 0; |
|
|
298 | read (sigpipe [0], &revents, 1); |
|
|
299 | |
|
|
300 | for (sig = signalmax; sig--; ) |
|
|
301 | if (signals [sig].gotsig) |
|
|
302 | { |
|
|
303 | signals [sig].gotsig = 0; |
|
|
304 | |
|
|
305 | for (w = signals [sig].head; w; w = w->next) |
|
|
306 | event ((W)w, EV_SIGNAL); |
|
|
307 | } |
950 | } |
308 | } |
951 | } |
309 | |
952 | |
310 | static void |
953 | /* do not submit kernel events for fds that have reify set */ |
311 | siginit (void) |
954 | /* because that means they changed while we were polling for new events */ |
|
|
955 | inline_speed void |
|
|
956 | fd_event (EV_P_ int fd, int revents) |
312 | { |
957 | { |
313 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
958 | ANFD *anfd = anfds + fd; |
314 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
|
|
315 | |
959 | |
316 | /* rather than sort out wether we really need nb, set it */ |
960 | if (expect_true (!anfd->reify)) |
317 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
961 | fd_event_nocheck (EV_A_ fd, revents); |
318 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
|
|
319 | |
|
|
320 | evio_set (&sigev, sigpipe [0], EV_READ); |
|
|
321 | evio_start (&sigev); |
|
|
322 | } |
962 | } |
323 | |
963 | |
324 | /*****************************************************************************/ |
964 | void |
325 | |
965 | ev_feed_fd_event (EV_P_ int fd, int revents) |
326 | static struct ev_idle **idles; |
|
|
327 | static int idlemax, idlecnt; |
|
|
328 | |
|
|
329 | static struct ev_prepare **prepares; |
|
|
330 | static int preparemax, preparecnt; |
|
|
331 | |
|
|
332 | static struct ev_check **checks; |
|
|
333 | static int checkmax, checkcnt; |
|
|
334 | |
|
|
335 | /*****************************************************************************/ |
|
|
336 | |
|
|
337 | #if HAVE_EPOLL |
|
|
338 | # include "ev_epoll.c" |
|
|
339 | #endif |
|
|
340 | #if HAVE_SELECT |
|
|
341 | # include "ev_select.c" |
|
|
342 | #endif |
|
|
343 | |
|
|
344 | int ev_init (int flags) |
|
|
345 | { |
966 | { |
346 | #if HAVE_MONOTONIC |
967 | if (fd >= 0 && fd < anfdmax) |
347 | { |
968 | fd_event_nocheck (EV_A_ fd, revents); |
348 | struct timespec ts; |
|
|
349 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
350 | have_monotonic = 1; |
|
|
351 | } |
|
|
352 | #endif |
|
|
353 | |
|
|
354 | ev_now = ev_time (); |
|
|
355 | now = get_clock (); |
|
|
356 | diff = ev_now - now; |
|
|
357 | |
|
|
358 | if (pipe (sigpipe)) |
|
|
359 | return 0; |
|
|
360 | |
|
|
361 | ev_method = EVMETHOD_NONE; |
|
|
362 | #if HAVE_EPOLL |
|
|
363 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
|
|
364 | #endif |
|
|
365 | #if HAVE_SELECT |
|
|
366 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
|
|
367 | #endif |
|
|
368 | |
|
|
369 | if (ev_method) |
|
|
370 | { |
|
|
371 | evw_init (&sigev, sigcb); |
|
|
372 | siginit (); |
|
|
373 | } |
|
|
374 | |
|
|
375 | return ev_method; |
|
|
376 | } |
969 | } |
377 | |
970 | |
378 | /*****************************************************************************/ |
971 | /* make sure the external fd watch events are in-sync */ |
379 | |
972 | /* with the kernel/libev internal state */ |
380 | void ev_prefork (void) |
973 | inline_size void |
381 | { |
974 | fd_reify (EV_P) |
382 | /* nop */ |
|
|
383 | } |
|
|
384 | |
|
|
385 | void ev_postfork_parent (void) |
|
|
386 | { |
|
|
387 | /* nop */ |
|
|
388 | } |
|
|
389 | |
|
|
390 | void ev_postfork_child (void) |
|
|
391 | { |
|
|
392 | #if HAVE_EPOLL |
|
|
393 | if (ev_method == EVMETHOD_EPOLL) |
|
|
394 | epoll_postfork_child (); |
|
|
395 | #endif |
|
|
396 | |
|
|
397 | evio_stop (&sigev); |
|
|
398 | close (sigpipe [0]); |
|
|
399 | close (sigpipe [1]); |
|
|
400 | pipe (sigpipe); |
|
|
401 | siginit (); |
|
|
402 | } |
|
|
403 | |
|
|
404 | /*****************************************************************************/ |
|
|
405 | |
|
|
406 | static void |
|
|
407 | fd_reify (void) |
|
|
408 | { |
975 | { |
409 | int i; |
976 | int i; |
410 | |
977 | |
411 | for (i = 0; i < fdchangecnt; ++i) |
978 | for (i = 0; i < fdchangecnt; ++i) |
412 | { |
979 | { |
413 | int fd = fdchanges [i]; |
980 | int fd = fdchanges [i]; |
414 | ANFD *anfd = anfds + fd; |
981 | ANFD *anfd = anfds + fd; |
415 | struct ev_io *w; |
982 | ev_io *w; |
416 | |
983 | |
417 | int wev = 0; |
984 | unsigned char o_events = anfd->events; |
|
|
985 | unsigned char o_reify = anfd->reify; |
418 | |
986 | |
419 | for (w = anfd->head; w; w = w->next) |
987 | anfd->reify = 0; |
420 | wev |= w->events; |
|
|
421 | |
988 | |
422 | if (anfd->wev != wev) |
989 | #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
|
|
990 | if (o_reify & EV__IOFDSET) |
423 | { |
991 | { |
424 | method_modify (fd, anfd->wev, wev); |
992 | unsigned long arg; |
425 | anfd->wev = wev; |
993 | anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
|
|
994 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
|
|
995 | printf ("oi %d %x\n", fd, anfd->handle);//D |
426 | } |
996 | } |
|
|
997 | #endif |
|
|
998 | |
|
|
999 | /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ |
|
|
1000 | { |
|
|
1001 | anfd->events = 0; |
|
|
1002 | |
|
|
1003 | for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
|
|
1004 | anfd->events |= (unsigned char)w->events; |
|
|
1005 | |
|
|
1006 | if (o_events != anfd->events) |
|
|
1007 | o_reify = EV__IOFDSET; /* actually |= */ |
|
|
1008 | } |
|
|
1009 | |
|
|
1010 | if (o_reify & EV__IOFDSET) |
|
|
1011 | backend_modify (EV_A_ fd, o_events, anfd->events); |
427 | } |
1012 | } |
428 | |
1013 | |
429 | fdchangecnt = 0; |
1014 | fdchangecnt = 0; |
430 | } |
1015 | } |
431 | |
1016 | |
|
|
1017 | /* something about the given fd changed */ |
|
|
1018 | inline_size void |
|
|
1019 | fd_change (EV_P_ int fd, int flags) |
|
|
1020 | { |
|
|
1021 | unsigned char reify = anfds [fd].reify; |
|
|
1022 | anfds [fd].reify |= flags; |
|
|
1023 | |
|
|
1024 | if (expect_true (!reify)) |
|
|
1025 | { |
|
|
1026 | ++fdchangecnt; |
|
|
1027 | array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
|
|
1028 | fdchanges [fdchangecnt - 1] = fd; |
|
|
1029 | } |
|
|
1030 | } |
|
|
1031 | |
|
|
1032 | /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ |
|
|
1033 | inline_speed void |
|
|
1034 | fd_kill (EV_P_ int fd) |
|
|
1035 | { |
|
|
1036 | ev_io *w; |
|
|
1037 | |
|
|
1038 | while ((w = (ev_io *)anfds [fd].head)) |
|
|
1039 | { |
|
|
1040 | ev_io_stop (EV_A_ w); |
|
|
1041 | ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
|
|
1042 | } |
|
|
1043 | } |
|
|
1044 | |
|
|
1045 | /* check whether the given fd is actually valid, for error recovery */ |
|
|
1046 | inline_size int |
|
|
1047 | fd_valid (int fd) |
|
|
1048 | { |
|
|
1049 | #ifdef _WIN32 |
|
|
1050 | return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
|
|
1051 | #else |
|
|
1052 | return fcntl (fd, F_GETFD) != -1; |
|
|
1053 | #endif |
|
|
1054 | } |
|
|
1055 | |
|
|
1056 | /* called on EBADF to verify fds */ |
|
|
1057 | static void noinline |
|
|
1058 | fd_ebadf (EV_P) |
|
|
1059 | { |
|
|
1060 | int fd; |
|
|
1061 | |
|
|
1062 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
1063 | if (anfds [fd].events) |
|
|
1064 | if (!fd_valid (fd) && errno == EBADF) |
|
|
1065 | fd_kill (EV_A_ fd); |
|
|
1066 | } |
|
|
1067 | |
|
|
1068 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
|
|
1069 | static void noinline |
|
|
1070 | fd_enomem (EV_P) |
|
|
1071 | { |
|
|
1072 | int fd; |
|
|
1073 | |
|
|
1074 | for (fd = anfdmax; fd--; ) |
|
|
1075 | if (anfds [fd].events) |
|
|
1076 | { |
|
|
1077 | fd_kill (EV_A_ fd); |
|
|
1078 | break; |
|
|
1079 | } |
|
|
1080 | } |
|
|
1081 | |
|
|
1082 | /* usually called after fork if backend needs to re-arm all fds from scratch */ |
|
|
1083 | static void noinline |
|
|
1084 | fd_rearm_all (EV_P) |
|
|
1085 | { |
|
|
1086 | int fd; |
|
|
1087 | |
|
|
1088 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
1089 | if (anfds [fd].events) |
|
|
1090 | { |
|
|
1091 | anfds [fd].events = 0; |
|
|
1092 | anfds [fd].emask = 0; |
|
|
1093 | fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); |
|
|
1094 | } |
|
|
1095 | } |
|
|
1096 | |
|
|
1097 | /* used to prepare libev internal fd's */ |
|
|
1098 | /* this is not fork-safe */ |
|
|
1099 | inline_speed void |
|
|
1100 | fd_intern (int fd) |
|
|
1101 | { |
|
|
1102 | #ifdef _WIN32 |
|
|
1103 | unsigned long arg = 1; |
|
|
1104 | ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
|
|
1105 | #else |
|
|
1106 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
|
1107 | fcntl (fd, F_SETFL, O_NONBLOCK); |
|
|
1108 | #endif |
|
|
1109 | } |
|
|
1110 | |
|
|
1111 | /*****************************************************************************/ |
|
|
1112 | |
|
|
1113 | /* |
|
|
1114 | * the heap functions want a real array index. array index 0 is guaranteed to not |
|
|
1115 | * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives |
|
|
1116 | * the branching factor of the d-tree. |
|
|
1117 | */ |
|
|
1118 | |
|
|
1119 | /* |
|
|
1120 | * at the moment we allow libev the luxury of two heaps, |
|
|
1121 | * a small-code-size 2-heap one and a ~1.5kb larger 4-heap |
|
|
1122 | * which is more cache-efficient. |
|
|
1123 | * the difference is about 5% with 50000+ watchers. |
|
|
1124 | */ |
|
|
1125 | #if EV_USE_4HEAP |
|
|
1126 | |
|
|
1127 | #define DHEAP 4 |
|
|
1128 | #define HEAP0 (DHEAP - 1) /* index of first element in heap */ |
|
|
1129 | #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) |
|
|
1130 | #define UPHEAP_DONE(p,k) ((p) == (k)) |
|
|
1131 | |
|
|
1132 | /* away from the root */ |
|
|
1133 | inline_speed void |
|
|
1134 | downheap (ANHE *heap, int N, int k) |
|
|
1135 | { |
|
|
1136 | ANHE he = heap [k]; |
|
|
1137 | ANHE *E = heap + N + HEAP0; |
|
|
1138 | |
|
|
1139 | for (;;) |
|
|
1140 | { |
|
|
1141 | ev_tstamp minat; |
|
|
1142 | ANHE *minpos; |
|
|
1143 | ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; |
|
|
1144 | |
|
|
1145 | /* find minimum child */ |
|
|
1146 | if (expect_true (pos + DHEAP - 1 < E)) |
|
|
1147 | { |
|
|
1148 | /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
|
|
1149 | if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
|
|
1150 | if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
|
|
1151 | if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
|
|
1152 | } |
|
|
1153 | else if (pos < E) |
|
|
1154 | { |
|
|
1155 | /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
|
|
1156 | if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
|
|
1157 | if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
|
|
1158 | if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
|
|
1159 | } |
|
|
1160 | else |
|
|
1161 | break; |
|
|
1162 | |
|
|
1163 | if (ANHE_at (he) <= minat) |
|
|
1164 | break; |
|
|
1165 | |
|
|
1166 | heap [k] = *minpos; |
|
|
1167 | ev_active (ANHE_w (*minpos)) = k; |
|
|
1168 | |
|
|
1169 | k = minpos - heap; |
|
|
1170 | } |
|
|
1171 | |
|
|
1172 | heap [k] = he; |
|
|
1173 | ev_active (ANHE_w (he)) = k; |
|
|
1174 | } |
|
|
1175 | |
|
|
1176 | #else /* 4HEAP */ |
|
|
1177 | |
|
|
1178 | #define HEAP0 1 |
|
|
1179 | #define HPARENT(k) ((k) >> 1) |
|
|
1180 | #define UPHEAP_DONE(p,k) (!(p)) |
|
|
1181 | |
|
|
1182 | /* away from the root */ |
|
|
1183 | inline_speed void |
|
|
1184 | downheap (ANHE *heap, int N, int k) |
|
|
1185 | { |
|
|
1186 | ANHE he = heap [k]; |
|
|
1187 | |
|
|
1188 | for (;;) |
|
|
1189 | { |
|
|
1190 | int c = k << 1; |
|
|
1191 | |
|
|
1192 | if (c >= N + HEAP0) |
|
|
1193 | break; |
|
|
1194 | |
|
|
1195 | c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) |
|
|
1196 | ? 1 : 0; |
|
|
1197 | |
|
|
1198 | if (ANHE_at (he) <= ANHE_at (heap [c])) |
|
|
1199 | break; |
|
|
1200 | |
|
|
1201 | heap [k] = heap [c]; |
|
|
1202 | ev_active (ANHE_w (heap [k])) = k; |
|
|
1203 | |
|
|
1204 | k = c; |
|
|
1205 | } |
|
|
1206 | |
|
|
1207 | heap [k] = he; |
|
|
1208 | ev_active (ANHE_w (he)) = k; |
|
|
1209 | } |
|
|
1210 | #endif |
|
|
1211 | |
|
|
1212 | /* towards the root */ |
|
|
1213 | inline_speed void |
|
|
1214 | upheap (ANHE *heap, int k) |
|
|
1215 | { |
|
|
1216 | ANHE he = heap [k]; |
|
|
1217 | |
|
|
1218 | for (;;) |
|
|
1219 | { |
|
|
1220 | int p = HPARENT (k); |
|
|
1221 | |
|
|
1222 | if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) |
|
|
1223 | break; |
|
|
1224 | |
|
|
1225 | heap [k] = heap [p]; |
|
|
1226 | ev_active (ANHE_w (heap [k])) = k; |
|
|
1227 | k = p; |
|
|
1228 | } |
|
|
1229 | |
|
|
1230 | heap [k] = he; |
|
|
1231 | ev_active (ANHE_w (he)) = k; |
|
|
1232 | } |
|
|
1233 | |
|
|
1234 | /* move an element suitably so it is in a correct place */ |
|
|
1235 | inline_size void |
|
|
1236 | adjustheap (ANHE *heap, int N, int k) |
|
|
1237 | { |
|
|
1238 | if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) |
|
|
1239 | upheap (heap, k); |
|
|
1240 | else |
|
|
1241 | downheap (heap, N, k); |
|
|
1242 | } |
|
|
1243 | |
|
|
1244 | /* rebuild the heap: this function is used only once and executed rarely */ |
|
|
1245 | inline_size void |
|
|
1246 | reheap (ANHE *heap, int N) |
|
|
1247 | { |
|
|
1248 | int i; |
|
|
1249 | |
|
|
1250 | /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ |
|
|
1251 | /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ |
|
|
1252 | for (i = 0; i < N; ++i) |
|
|
1253 | upheap (heap, i + HEAP0); |
|
|
1254 | } |
|
|
1255 | |
|
|
1256 | /*****************************************************************************/ |
|
|
1257 | |
|
|
1258 | /* associate signal watchers to a signal signal */ |
|
|
1259 | typedef struct |
|
|
1260 | { |
|
|
1261 | EV_ATOMIC_T pending; |
|
|
1262 | #if EV_MULTIPLICITY |
|
|
1263 | EV_P; |
|
|
1264 | #endif |
|
|
1265 | WL head; |
|
|
1266 | } ANSIG; |
|
|
1267 | |
|
|
1268 | static ANSIG signals [EV_NSIG - 1]; |
|
|
1269 | |
|
|
1270 | /*****************************************************************************/ |
|
|
1271 | |
|
|
1272 | #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
|
|
1273 | |
|
|
1274 | static void noinline |
|
|
1275 | evpipe_init (EV_P) |
|
|
1276 | { |
|
|
1277 | if (!ev_is_active (&pipe_w)) |
|
|
1278 | { |
|
|
1279 | # if EV_USE_EVENTFD |
|
|
1280 | evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); |
|
|
1281 | if (evfd < 0 && errno == EINVAL) |
|
|
1282 | evfd = eventfd (0, 0); |
|
|
1283 | |
|
|
1284 | if (evfd >= 0) |
|
|
1285 | { |
|
|
1286 | evpipe [0] = -1; |
|
|
1287 | fd_intern (evfd); /* doing it twice doesn't hurt */ |
|
|
1288 | ev_io_set (&pipe_w, evfd, EV_READ); |
|
|
1289 | } |
|
|
1290 | else |
|
|
1291 | # endif |
|
|
1292 | { |
|
|
1293 | while (pipe (evpipe)) |
|
|
1294 | ev_syserr ("(libev) error creating signal/async pipe"); |
|
|
1295 | |
|
|
1296 | fd_intern (evpipe [0]); |
|
|
1297 | fd_intern (evpipe [1]); |
|
|
1298 | ev_io_set (&pipe_w, evpipe [0], EV_READ); |
|
|
1299 | } |
|
|
1300 | |
|
|
1301 | ev_io_start (EV_A_ &pipe_w); |
|
|
1302 | ev_unref (EV_A); /* watcher should not keep loop alive */ |
|
|
1303 | } |
|
|
1304 | } |
|
|
1305 | |
|
|
1306 | inline_size void |
|
|
1307 | evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
|
|
1308 | { |
|
|
1309 | if (!*flag) |
|
|
1310 | { |
|
|
1311 | int old_errno = errno; /* save errno because write might clobber it */ |
|
|
1312 | char dummy; |
|
|
1313 | |
|
|
1314 | *flag = 1; |
|
|
1315 | |
|
|
1316 | #if EV_USE_EVENTFD |
|
|
1317 | if (evfd >= 0) |
|
|
1318 | { |
|
|
1319 | uint64_t counter = 1; |
|
|
1320 | write (evfd, &counter, sizeof (uint64_t)); |
|
|
1321 | } |
|
|
1322 | else |
|
|
1323 | #endif |
|
|
1324 | /* win32 people keep sending patches that change this write() to send() */ |
|
|
1325 | /* and then run away. but send() is wrong, it wants a socket handle on win32 */ |
|
|
1326 | /* so when you think this write should be a send instead, please find out */ |
|
|
1327 | /* where your send() is from - it's definitely not the microsoft send, and */ |
|
|
1328 | /* tell me. thank you. */ |
|
|
1329 | write (evpipe [1], &dummy, 1); |
|
|
1330 | |
|
|
1331 | errno = old_errno; |
|
|
1332 | } |
|
|
1333 | } |
|
|
1334 | |
|
|
1335 | /* called whenever the libev signal pipe */ |
|
|
1336 | /* got some events (signal, async) */ |
432 | static void |
1337 | static void |
433 | call_pending () |
1338 | pipecb (EV_P_ ev_io *iow, int revents) |
434 | { |
1339 | { |
435 | while (pendingcnt) |
1340 | int i; |
|
|
1341 | |
|
|
1342 | #if EV_USE_EVENTFD |
|
|
1343 | if (evfd >= 0) |
|
|
1344 | { |
|
|
1345 | uint64_t counter; |
|
|
1346 | read (evfd, &counter, sizeof (uint64_t)); |
436 | { |
1347 | } |
437 | ANPENDING *p = pendings + --pendingcnt; |
1348 | else |
|
|
1349 | #endif |
|
|
1350 | { |
|
|
1351 | char dummy; |
|
|
1352 | /* see discussion in evpipe_write when you think this read should be recv in win32 */ |
|
|
1353 | read (evpipe [0], &dummy, 1); |
|
|
1354 | } |
438 | |
1355 | |
439 | if (p->w) |
1356 | if (sig_pending) |
|
|
1357 | { |
|
|
1358 | sig_pending = 0; |
|
|
1359 | |
|
|
1360 | for (i = EV_NSIG - 1; i--; ) |
|
|
1361 | if (expect_false (signals [i].pending)) |
|
|
1362 | ev_feed_signal_event (EV_A_ i + 1); |
|
|
1363 | } |
|
|
1364 | |
|
|
1365 | #if EV_ASYNC_ENABLE |
|
|
1366 | if (async_pending) |
|
|
1367 | { |
|
|
1368 | async_pending = 0; |
|
|
1369 | |
|
|
1370 | for (i = asynccnt; i--; ) |
|
|
1371 | if (asyncs [i]->sent) |
|
|
1372 | { |
|
|
1373 | asyncs [i]->sent = 0; |
|
|
1374 | ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
|
|
1375 | } |
|
|
1376 | } |
|
|
1377 | #endif |
|
|
1378 | } |
|
|
1379 | |
|
|
1380 | /*****************************************************************************/ |
|
|
1381 | |
|
|
1382 | void |
|
|
1383 | ev_feed_signal (int signum) |
|
|
1384 | { |
|
|
1385 | #if EV_MULTIPLICITY |
|
|
1386 | EV_P = signals [signum - 1].loop; |
|
|
1387 | |
|
|
1388 | if (!EV_A) |
|
|
1389 | return; |
|
|
1390 | #endif |
|
|
1391 | |
|
|
1392 | signals [signum - 1].pending = 1; |
|
|
1393 | evpipe_write (EV_A_ &sig_pending); |
|
|
1394 | } |
|
|
1395 | |
|
|
1396 | static void |
|
|
1397 | ev_sighandler (int signum) |
|
|
1398 | { |
|
|
1399 | #ifdef _WIN32 |
|
|
1400 | signal (signum, ev_sighandler); |
|
|
1401 | #endif |
|
|
1402 | |
|
|
1403 | ev_feed_signal (signum); |
|
|
1404 | } |
|
|
1405 | |
|
|
1406 | void noinline |
|
|
1407 | ev_feed_signal_event (EV_P_ int signum) |
|
|
1408 | { |
|
|
1409 | WL w; |
|
|
1410 | |
|
|
1411 | if (expect_false (signum <= 0 || signum > EV_NSIG)) |
|
|
1412 | return; |
|
|
1413 | |
|
|
1414 | --signum; |
|
|
1415 | |
|
|
1416 | #if EV_MULTIPLICITY |
|
|
1417 | /* it is permissible to try to feed a signal to the wrong loop */ |
|
|
1418 | /* or, likely more useful, feeding a signal nobody is waiting for */ |
|
|
1419 | |
|
|
1420 | if (expect_false (signals [signum].loop != EV_A)) |
|
|
1421 | return; |
|
|
1422 | #endif |
|
|
1423 | |
|
|
1424 | signals [signum].pending = 0; |
|
|
1425 | |
|
|
1426 | for (w = signals [signum].head; w; w = w->next) |
|
|
1427 | ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
|
|
1428 | } |
|
|
1429 | |
|
|
1430 | #if EV_USE_SIGNALFD |
|
|
1431 | static void |
|
|
1432 | sigfdcb (EV_P_ ev_io *iow, int revents) |
|
|
1433 | { |
|
|
1434 | struct signalfd_siginfo si[2], *sip; /* these structs are big */ |
|
|
1435 | |
|
|
1436 | for (;;) |
|
|
1437 | { |
|
|
1438 | ssize_t res = read (sigfd, si, sizeof (si)); |
|
|
1439 | |
|
|
1440 | /* not ISO-C, as res might be -1, but works with SuS */ |
|
|
1441 | for (sip = si; (char *)sip < (char *)si + res; ++sip) |
|
|
1442 | ev_feed_signal_event (EV_A_ sip->ssi_signo); |
|
|
1443 | |
|
|
1444 | if (res < (ssize_t)sizeof (si)) |
|
|
1445 | break; |
|
|
1446 | } |
|
|
1447 | } |
|
|
1448 | #endif |
|
|
1449 | |
|
|
1450 | #endif |
|
|
1451 | |
|
|
1452 | /*****************************************************************************/ |
|
|
1453 | |
|
|
1454 | #if EV_CHILD_ENABLE |
|
|
1455 | static WL childs [EV_PID_HASHSIZE]; |
|
|
1456 | |
|
|
1457 | static ev_signal childev; |
|
|
1458 | |
|
|
1459 | #ifndef WIFCONTINUED |
|
|
1460 | # define WIFCONTINUED(status) 0 |
|
|
1461 | #endif |
|
|
1462 | |
|
|
1463 | /* handle a single child status event */ |
|
|
1464 | inline_speed void |
|
|
1465 | child_reap (EV_P_ int chain, int pid, int status) |
|
|
1466 | { |
|
|
1467 | ev_child *w; |
|
|
1468 | int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
|
|
1469 | |
|
|
1470 | for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
|
|
1471 | { |
|
|
1472 | if ((w->pid == pid || !w->pid) |
|
|
1473 | && (!traced || (w->flags & 1))) |
440 | { |
1474 | { |
441 | p->w->pending = 0; |
1475 | ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ |
442 | p->w->cb (p->w, p->events); |
1476 | w->rpid = pid; |
|
|
1477 | w->rstatus = status; |
|
|
1478 | ev_feed_event (EV_A_ (W)w, EV_CHILD); |
443 | } |
1479 | } |
444 | } |
1480 | } |
445 | } |
1481 | } |
446 | |
1482 | |
|
|
1483 | #ifndef WCONTINUED |
|
|
1484 | # define WCONTINUED 0 |
|
|
1485 | #endif |
|
|
1486 | |
|
|
1487 | /* called on sigchld etc., calls waitpid */ |
447 | static void |
1488 | static void |
|
|
1489 | childcb (EV_P_ ev_signal *sw, int revents) |
|
|
1490 | { |
|
|
1491 | int pid, status; |
|
|
1492 | |
|
|
1493 | /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
|
|
1494 | if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
|
|
1495 | if (!WCONTINUED |
|
|
1496 | || errno != EINVAL |
|
|
1497 | || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
|
|
1498 | return; |
|
|
1499 | |
|
|
1500 | /* make sure we are called again until all children have been reaped */ |
|
|
1501 | /* we need to do it this way so that the callback gets called before we continue */ |
|
|
1502 | ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
|
|
1503 | |
|
|
1504 | child_reap (EV_A_ pid, pid, status); |
|
|
1505 | if ((EV_PID_HASHSIZE) > 1) |
|
|
1506 | child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
|
|
1507 | } |
|
|
1508 | |
|
|
1509 | #endif |
|
|
1510 | |
|
|
1511 | /*****************************************************************************/ |
|
|
1512 | |
|
|
1513 | #if EV_USE_IOCP |
|
|
1514 | # include "ev_iocp.c" |
|
|
1515 | #endif |
|
|
1516 | #if EV_USE_PORT |
|
|
1517 | # include "ev_port.c" |
|
|
1518 | #endif |
|
|
1519 | #if EV_USE_KQUEUE |
|
|
1520 | # include "ev_kqueue.c" |
|
|
1521 | #endif |
|
|
1522 | #if EV_USE_EPOLL |
|
|
1523 | # include "ev_epoll.c" |
|
|
1524 | #endif |
|
|
1525 | #if EV_USE_POLL |
|
|
1526 | # include "ev_poll.c" |
|
|
1527 | #endif |
|
|
1528 | #if EV_USE_SELECT |
|
|
1529 | # include "ev_select.c" |
|
|
1530 | #endif |
|
|
1531 | |
|
|
1532 | int |
|
|
1533 | ev_version_major (void) |
|
|
1534 | { |
|
|
1535 | return EV_VERSION_MAJOR; |
|
|
1536 | } |
|
|
1537 | |
|
|
1538 | int |
|
|
1539 | ev_version_minor (void) |
|
|
1540 | { |
|
|
1541 | return EV_VERSION_MINOR; |
|
|
1542 | } |
|
|
1543 | |
|
|
1544 | /* return true if we are running with elevated privileges and should ignore env variables */ |
|
|
1545 | int inline_size |
|
|
1546 | enable_secure (void) |
|
|
1547 | { |
|
|
1548 | #ifdef _WIN32 |
|
|
1549 | return 0; |
|
|
1550 | #else |
|
|
1551 | return getuid () != geteuid () |
|
|
1552 | || getgid () != getegid (); |
|
|
1553 | #endif |
|
|
1554 | } |
|
|
1555 | |
|
|
1556 | unsigned int |
|
|
1557 | ev_supported_backends (void) |
|
|
1558 | { |
|
|
1559 | unsigned int flags = 0; |
|
|
1560 | |
|
|
1561 | if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
|
|
1562 | if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
|
|
1563 | if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
|
|
1564 | if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
|
|
1565 | if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
|
|
1566 | |
|
|
1567 | return flags; |
|
|
1568 | } |
|
|
1569 | |
|
|
1570 | unsigned int |
|
|
1571 | ev_recommended_backends (void) |
|
|
1572 | { |
|
|
1573 | unsigned int flags = ev_supported_backends (); |
|
|
1574 | |
|
|
1575 | #ifndef __NetBSD__ |
|
|
1576 | /* kqueue is borked on everything but netbsd apparently */ |
|
|
1577 | /* it usually doesn't work correctly on anything but sockets and pipes */ |
|
|
1578 | flags &= ~EVBACKEND_KQUEUE; |
|
|
1579 | #endif |
|
|
1580 | #ifdef __APPLE__ |
|
|
1581 | /* only select works correctly on that "unix-certified" platform */ |
|
|
1582 | flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ |
|
|
1583 | flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ |
|
|
1584 | #endif |
|
|
1585 | #ifdef __FreeBSD__ |
|
|
1586 | flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ |
|
|
1587 | #endif |
|
|
1588 | |
|
|
1589 | return flags; |
|
|
1590 | } |
|
|
1591 | |
|
|
1592 | unsigned int |
|
|
1593 | ev_embeddable_backends (void) |
|
|
1594 | { |
|
|
1595 | int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
|
|
1596 | |
|
|
1597 | /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
|
|
1598 | if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ |
|
|
1599 | flags &= ~EVBACKEND_EPOLL; |
|
|
1600 | |
|
|
1601 | return flags; |
|
|
1602 | } |
|
|
1603 | |
|
|
1604 | unsigned int |
|
|
1605 | ev_backend (EV_P) |
|
|
1606 | { |
|
|
1607 | return backend; |
|
|
1608 | } |
|
|
1609 | |
|
|
1610 | #if EV_FEATURE_API |
|
|
1611 | unsigned int |
|
|
1612 | ev_iteration (EV_P) |
|
|
1613 | { |
|
|
1614 | return loop_count; |
|
|
1615 | } |
|
|
1616 | |
|
|
1617 | unsigned int |
|
|
1618 | ev_depth (EV_P) |
|
|
1619 | { |
|
|
1620 | return loop_depth; |
|
|
1621 | } |
|
|
1622 | |
|
|
1623 | void |
|
|
1624 | ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
|
|
1625 | { |
|
|
1626 | io_blocktime = interval; |
|
|
1627 | } |
|
|
1628 | |
|
|
1629 | void |
|
|
1630 | ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
|
|
1631 | { |
|
|
1632 | timeout_blocktime = interval; |
|
|
1633 | } |
|
|
1634 | |
|
|
1635 | void |
|
|
1636 | ev_set_userdata (EV_P_ void *data) |
|
|
1637 | { |
|
|
1638 | userdata = data; |
|
|
1639 | } |
|
|
1640 | |
|
|
1641 | void * |
|
|
1642 | ev_userdata (EV_P) |
|
|
1643 | { |
|
|
1644 | return userdata; |
|
|
1645 | } |
|
|
1646 | |
|
|
1647 | void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) |
|
|
1648 | { |
|
|
1649 | invoke_cb = invoke_pending_cb; |
|
|
1650 | } |
|
|
1651 | |
|
|
1652 | void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) |
|
|
1653 | { |
|
|
1654 | release_cb = release; |
|
|
1655 | acquire_cb = acquire; |
|
|
1656 | } |
|
|
1657 | #endif |
|
|
1658 | |
|
|
1659 | /* initialise a loop structure, must be zero-initialised */ |
|
|
1660 | static void noinline |
|
|
1661 | loop_init (EV_P_ unsigned int flags) |
|
|
1662 | { |
|
|
1663 | if (!backend) |
|
|
1664 | { |
|
|
1665 | origflags = flags; |
|
|
1666 | |
|
|
1667 | #if EV_USE_REALTIME |
|
|
1668 | if (!have_realtime) |
|
|
1669 | { |
|
|
1670 | struct timespec ts; |
|
|
1671 | |
|
|
1672 | if (!clock_gettime (CLOCK_REALTIME, &ts)) |
|
|
1673 | have_realtime = 1; |
|
|
1674 | } |
|
|
1675 | #endif |
|
|
1676 | |
|
|
1677 | #if EV_USE_MONOTONIC |
|
|
1678 | if (!have_monotonic) |
|
|
1679 | { |
|
|
1680 | struct timespec ts; |
|
|
1681 | |
|
|
1682 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
1683 | have_monotonic = 1; |
|
|
1684 | } |
|
|
1685 | #endif |
|
|
1686 | |
|
|
1687 | /* pid check not overridable via env */ |
|
|
1688 | #ifndef _WIN32 |
|
|
1689 | if (flags & EVFLAG_FORKCHECK) |
|
|
1690 | curpid = getpid (); |
|
|
1691 | #endif |
|
|
1692 | |
|
|
1693 | if (!(flags & EVFLAG_NOENV) |
|
|
1694 | && !enable_secure () |
|
|
1695 | && getenv ("LIBEV_FLAGS")) |
|
|
1696 | flags = atoi (getenv ("LIBEV_FLAGS")); |
|
|
1697 | |
|
|
1698 | ev_rt_now = ev_time (); |
|
|
1699 | mn_now = get_clock (); |
|
|
1700 | now_floor = mn_now; |
|
|
1701 | rtmn_diff = ev_rt_now - mn_now; |
|
|
1702 | #if EV_FEATURE_API |
|
|
1703 | invoke_cb = ev_invoke_pending; |
|
|
1704 | #endif |
|
|
1705 | |
|
|
1706 | io_blocktime = 0.; |
|
|
1707 | timeout_blocktime = 0.; |
|
|
1708 | backend = 0; |
|
|
1709 | backend_fd = -1; |
|
|
1710 | sig_pending = 0; |
|
|
1711 | #if EV_ASYNC_ENABLE |
|
|
1712 | async_pending = 0; |
|
|
1713 | #endif |
|
|
1714 | #if EV_USE_INOTIFY |
|
|
1715 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
|
|
1716 | #endif |
|
|
1717 | #if EV_USE_SIGNALFD |
|
|
1718 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
|
|
1719 | #endif |
|
|
1720 | |
|
|
1721 | if (!(flags & EVBACKEND_MASK)) |
|
|
1722 | flags |= ev_recommended_backends (); |
|
|
1723 | |
|
|
1724 | #if EV_USE_IOCP |
|
|
1725 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
|
|
1726 | #endif |
|
|
1727 | #if EV_USE_PORT |
|
|
1728 | if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
|
|
1729 | #endif |
|
|
1730 | #if EV_USE_KQUEUE |
|
|
1731 | if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
|
|
1732 | #endif |
|
|
1733 | #if EV_USE_EPOLL |
|
|
1734 | if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
|
|
1735 | #endif |
|
|
1736 | #if EV_USE_POLL |
|
|
1737 | if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
|
|
1738 | #endif |
|
|
1739 | #if EV_USE_SELECT |
|
|
1740 | if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
|
|
1741 | #endif |
|
|
1742 | |
|
|
1743 | ev_prepare_init (&pending_w, pendingcb); |
|
|
1744 | |
|
|
1745 | #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
|
|
1746 | ev_init (&pipe_w, pipecb); |
|
|
1747 | ev_set_priority (&pipe_w, EV_MAXPRI); |
|
|
1748 | #endif |
|
|
1749 | } |
|
|
1750 | } |
|
|
1751 | |
|
|
1752 | /* free up a loop structure */ |
|
|
1753 | void |
|
|
1754 | ev_loop_destroy (EV_P) |
|
|
1755 | { |
|
|
1756 | int i; |
|
|
1757 | |
|
|
1758 | #if EV_MULTIPLICITY |
|
|
1759 | /* mimic free (0) */ |
|
|
1760 | if (!EV_A) |
|
|
1761 | return; |
|
|
1762 | #endif |
|
|
1763 | |
|
|
1764 | #if EV_CLEANUP_ENABLE |
|
|
1765 | /* queue cleanup watchers (and execute them) */ |
|
|
1766 | if (expect_false (cleanupcnt)) |
|
|
1767 | { |
|
|
1768 | queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); |
|
|
1769 | EV_INVOKE_PENDING; |
|
|
1770 | } |
|
|
1771 | #endif |
|
|
1772 | |
|
|
1773 | #if EV_CHILD_ENABLE |
|
|
1774 | if (ev_is_active (&childev)) |
|
|
1775 | { |
|
|
1776 | ev_ref (EV_A); /* child watcher */ |
|
|
1777 | ev_signal_stop (EV_A_ &childev); |
|
|
1778 | } |
|
|
1779 | #endif |
|
|
1780 | |
|
|
1781 | if (ev_is_active (&pipe_w)) |
|
|
1782 | { |
|
|
1783 | /*ev_ref (EV_A);*/ |
|
|
1784 | /*ev_io_stop (EV_A_ &pipe_w);*/ |
|
|
1785 | |
|
|
1786 | #if EV_USE_EVENTFD |
|
|
1787 | if (evfd >= 0) |
|
|
1788 | close (evfd); |
|
|
1789 | #endif |
|
|
1790 | |
|
|
1791 | if (evpipe [0] >= 0) |
|
|
1792 | { |
|
|
1793 | EV_WIN32_CLOSE_FD (evpipe [0]); |
|
|
1794 | EV_WIN32_CLOSE_FD (evpipe [1]); |
|
|
1795 | } |
|
|
1796 | } |
|
|
1797 | |
|
|
1798 | #if EV_USE_SIGNALFD |
|
|
1799 | if (ev_is_active (&sigfd_w)) |
|
|
1800 | close (sigfd); |
|
|
1801 | #endif |
|
|
1802 | |
|
|
1803 | #if EV_USE_INOTIFY |
|
|
1804 | if (fs_fd >= 0) |
|
|
1805 | close (fs_fd); |
|
|
1806 | #endif |
|
|
1807 | |
|
|
1808 | if (backend_fd >= 0) |
|
|
1809 | close (backend_fd); |
|
|
1810 | |
|
|
1811 | #if EV_USE_IOCP |
|
|
1812 | if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); |
|
|
1813 | #endif |
|
|
1814 | #if EV_USE_PORT |
|
|
1815 | if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
|
|
1816 | #endif |
|
|
1817 | #if EV_USE_KQUEUE |
|
|
1818 | if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
|
|
1819 | #endif |
|
|
1820 | #if EV_USE_EPOLL |
|
|
1821 | if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
|
|
1822 | #endif |
|
|
1823 | #if EV_USE_POLL |
|
|
1824 | if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
|
|
1825 | #endif |
|
|
1826 | #if EV_USE_SELECT |
|
|
1827 | if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
|
|
1828 | #endif |
|
|
1829 | |
|
|
1830 | for (i = NUMPRI; i--; ) |
|
|
1831 | { |
|
|
1832 | array_free (pending, [i]); |
|
|
1833 | #if EV_IDLE_ENABLE |
|
|
1834 | array_free (idle, [i]); |
|
|
1835 | #endif |
|
|
1836 | } |
|
|
1837 | |
|
|
1838 | ev_free (anfds); anfds = 0; anfdmax = 0; |
|
|
1839 | |
|
|
1840 | /* have to use the microsoft-never-gets-it-right macro */ |
|
|
1841 | array_free (rfeed, EMPTY); |
|
|
1842 | array_free (fdchange, EMPTY); |
|
|
1843 | array_free (timer, EMPTY); |
|
|
1844 | #if EV_PERIODIC_ENABLE |
|
|
1845 | array_free (periodic, EMPTY); |
|
|
1846 | #endif |
|
|
1847 | #if EV_FORK_ENABLE |
|
|
1848 | array_free (fork, EMPTY); |
|
|
1849 | #endif |
|
|
1850 | #if EV_CLEANUP_ENABLE |
|
|
1851 | array_free (cleanup, EMPTY); |
|
|
1852 | #endif |
|
|
1853 | array_free (prepare, EMPTY); |
|
|
1854 | array_free (check, EMPTY); |
|
|
1855 | #if EV_ASYNC_ENABLE |
|
|
1856 | array_free (async, EMPTY); |
|
|
1857 | #endif |
|
|
1858 | |
|
|
1859 | backend = 0; |
|
|
1860 | |
|
|
1861 | #if EV_MULTIPLICITY |
|
|
1862 | if (ev_is_default_loop (EV_A)) |
|
|
1863 | #endif |
|
|
1864 | ev_default_loop_ptr = 0; |
|
|
1865 | #if EV_MULTIPLICITY |
|
|
1866 | else |
|
|
1867 | ev_free (EV_A); |
|
|
1868 | #endif |
|
|
1869 | } |
|
|
1870 | |
|
|
1871 | #if EV_USE_INOTIFY |
|
|
1872 | inline_size void infy_fork (EV_P); |
|
|
1873 | #endif |
|
|
1874 | |
|
|
1875 | inline_size void |
|
|
1876 | loop_fork (EV_P) |
|
|
1877 | { |
|
|
1878 | #if EV_USE_PORT |
|
|
1879 | if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
|
|
1880 | #endif |
|
|
1881 | #if EV_USE_KQUEUE |
|
|
1882 | if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
|
|
1883 | #endif |
|
|
1884 | #if EV_USE_EPOLL |
|
|
1885 | if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
|
|
1886 | #endif |
|
|
1887 | #if EV_USE_INOTIFY |
|
|
1888 | infy_fork (EV_A); |
|
|
1889 | #endif |
|
|
1890 | |
|
|
1891 | if (ev_is_active (&pipe_w)) |
|
|
1892 | { |
|
|
1893 | /* this "locks" the handlers against writing to the pipe */ |
|
|
1894 | /* while we modify the fd vars */ |
|
|
1895 | sig_pending = 1; |
|
|
1896 | #if EV_ASYNC_ENABLE |
|
|
1897 | async_pending = 1; |
|
|
1898 | #endif |
|
|
1899 | |
|
|
1900 | ev_ref (EV_A); |
|
|
1901 | ev_io_stop (EV_A_ &pipe_w); |
|
|
1902 | |
|
|
1903 | #if EV_USE_EVENTFD |
|
|
1904 | if (evfd >= 0) |
|
|
1905 | close (evfd); |
|
|
1906 | #endif |
|
|
1907 | |
|
|
1908 | if (evpipe [0] >= 0) |
|
|
1909 | { |
|
|
1910 | EV_WIN32_CLOSE_FD (evpipe [0]); |
|
|
1911 | EV_WIN32_CLOSE_FD (evpipe [1]); |
|
|
1912 | } |
|
|
1913 | |
|
|
1914 | #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
|
|
1915 | evpipe_init (EV_A); |
|
|
1916 | /* now iterate over everything, in case we missed something */ |
|
|
1917 | pipecb (EV_A_ &pipe_w, EV_READ); |
|
|
1918 | #endif |
|
|
1919 | } |
|
|
1920 | |
|
|
1921 | postfork = 0; |
|
|
1922 | } |
|
|
1923 | |
|
|
1924 | #if EV_MULTIPLICITY |
|
|
1925 | |
|
|
1926 | struct ev_loop * |
|
|
1927 | ev_loop_new (unsigned int flags) |
|
|
1928 | { |
|
|
1929 | EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
|
|
1930 | |
|
|
1931 | memset (EV_A, 0, sizeof (struct ev_loop)); |
|
|
1932 | loop_init (EV_A_ flags); |
|
|
1933 | |
|
|
1934 | if (ev_backend (EV_A)) |
|
|
1935 | return EV_A; |
|
|
1936 | |
|
|
1937 | ev_free (EV_A); |
|
|
1938 | return 0; |
|
|
1939 | } |
|
|
1940 | |
|
|
1941 | #endif /* multiplicity */ |
|
|
1942 | |
|
|
1943 | #if EV_VERIFY |
|
|
1944 | static void noinline |
|
|
1945 | verify_watcher (EV_P_ W w) |
|
|
1946 | { |
|
|
1947 | assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); |
|
|
1948 | |
|
|
1949 | if (w->pending) |
|
|
1950 | assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); |
|
|
1951 | } |
|
|
1952 | |
|
|
1953 | static void noinline |
|
|
1954 | verify_heap (EV_P_ ANHE *heap, int N) |
|
|
1955 | { |
|
|
1956 | int i; |
|
|
1957 | |
|
|
1958 | for (i = HEAP0; i < N + HEAP0; ++i) |
|
|
1959 | { |
|
|
1960 | assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); |
|
|
1961 | assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); |
|
|
1962 | assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); |
|
|
1963 | |
|
|
1964 | verify_watcher (EV_A_ (W)ANHE_w (heap [i])); |
|
|
1965 | } |
|
|
1966 | } |
|
|
1967 | |
|
|
1968 | static void noinline |
|
|
1969 | array_verify (EV_P_ W *ws, int cnt) |
|
|
1970 | { |
|
|
1971 | while (cnt--) |
|
|
1972 | { |
|
|
1973 | assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); |
|
|
1974 | verify_watcher (EV_A_ ws [cnt]); |
|
|
1975 | } |
|
|
1976 | } |
|
|
1977 | #endif |
|
|
1978 | |
|
|
1979 | #if EV_FEATURE_API |
|
|
1980 | void |
|
|
1981 | ev_verify (EV_P) |
|
|
1982 | { |
|
|
1983 | #if EV_VERIFY |
|
|
1984 | int i; |
|
|
1985 | WL w; |
|
|
1986 | |
|
|
1987 | assert (activecnt >= -1); |
|
|
1988 | |
|
|
1989 | assert (fdchangemax >= fdchangecnt); |
|
|
1990 | for (i = 0; i < fdchangecnt; ++i) |
|
|
1991 | assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); |
|
|
1992 | |
|
|
1993 | assert (anfdmax >= 0); |
|
|
1994 | for (i = 0; i < anfdmax; ++i) |
|
|
1995 | for (w = anfds [i].head; w; w = w->next) |
|
|
1996 | { |
|
|
1997 | verify_watcher (EV_A_ (W)w); |
|
|
1998 | assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); |
|
|
1999 | assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); |
|
|
2000 | } |
|
|
2001 | |
|
|
2002 | assert (timermax >= timercnt); |
|
|
2003 | verify_heap (EV_A_ timers, timercnt); |
|
|
2004 | |
|
|
2005 | #if EV_PERIODIC_ENABLE |
|
|
2006 | assert (periodicmax >= periodiccnt); |
|
|
2007 | verify_heap (EV_A_ periodics, periodiccnt); |
|
|
2008 | #endif |
|
|
2009 | |
|
|
2010 | for (i = NUMPRI; i--; ) |
|
|
2011 | { |
|
|
2012 | assert (pendingmax [i] >= pendingcnt [i]); |
|
|
2013 | #if EV_IDLE_ENABLE |
|
|
2014 | assert (idleall >= 0); |
|
|
2015 | assert (idlemax [i] >= idlecnt [i]); |
|
|
2016 | array_verify (EV_A_ (W *)idles [i], idlecnt [i]); |
|
|
2017 | #endif |
|
|
2018 | } |
|
|
2019 | |
|
|
2020 | #if EV_FORK_ENABLE |
|
|
2021 | assert (forkmax >= forkcnt); |
|
|
2022 | array_verify (EV_A_ (W *)forks, forkcnt); |
|
|
2023 | #endif |
|
|
2024 | |
|
|
2025 | #if EV_CLEANUP_ENABLE |
|
|
2026 | assert (cleanupmax >= cleanupcnt); |
|
|
2027 | array_verify (EV_A_ (W *)cleanups, cleanupcnt); |
|
|
2028 | #endif |
|
|
2029 | |
|
|
2030 | #if EV_ASYNC_ENABLE |
|
|
2031 | assert (asyncmax >= asynccnt); |
|
|
2032 | array_verify (EV_A_ (W *)asyncs, asynccnt); |
|
|
2033 | #endif |
|
|
2034 | |
|
|
2035 | #if EV_PREPARE_ENABLE |
|
|
2036 | assert (preparemax >= preparecnt); |
|
|
2037 | array_verify (EV_A_ (W *)prepares, preparecnt); |
|
|
2038 | #endif |
|
|
2039 | |
|
|
2040 | #if EV_CHECK_ENABLE |
|
|
2041 | assert (checkmax >= checkcnt); |
|
|
2042 | array_verify (EV_A_ (W *)checks, checkcnt); |
|
|
2043 | #endif |
|
|
2044 | |
|
|
2045 | # if 0 |
|
|
2046 | #if EV_CHILD_ENABLE |
|
|
2047 | for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
|
|
2048 | for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) |
|
|
2049 | #endif |
|
|
2050 | # endif |
|
|
2051 | #endif |
|
|
2052 | } |
|
|
2053 | #endif |
|
|
2054 | |
|
|
2055 | #if EV_MULTIPLICITY |
|
|
2056 | struct ev_loop * |
|
|
2057 | #else |
|
|
2058 | int |
|
|
2059 | #endif |
|
|
2060 | ev_default_loop (unsigned int flags) |
|
|
2061 | { |
|
|
2062 | if (!ev_default_loop_ptr) |
|
|
2063 | { |
|
|
2064 | #if EV_MULTIPLICITY |
|
|
2065 | EV_P = ev_default_loop_ptr = &default_loop_struct; |
|
|
2066 | #else |
|
|
2067 | ev_default_loop_ptr = 1; |
|
|
2068 | #endif |
|
|
2069 | |
|
|
2070 | loop_init (EV_A_ flags); |
|
|
2071 | |
|
|
2072 | if (ev_backend (EV_A)) |
|
|
2073 | { |
|
|
2074 | #if EV_CHILD_ENABLE |
|
|
2075 | ev_signal_init (&childev, childcb, SIGCHLD); |
|
|
2076 | ev_set_priority (&childev, EV_MAXPRI); |
|
|
2077 | ev_signal_start (EV_A_ &childev); |
|
|
2078 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
2079 | #endif |
|
|
2080 | } |
|
|
2081 | else |
|
|
2082 | ev_default_loop_ptr = 0; |
|
|
2083 | } |
|
|
2084 | |
|
|
2085 | return ev_default_loop_ptr; |
|
|
2086 | } |
|
|
2087 | |
|
|
2088 | void |
|
|
2089 | ev_loop_fork (EV_P) |
|
|
2090 | { |
|
|
2091 | postfork = 1; /* must be in line with ev_default_fork */ |
|
|
2092 | } |
|
|
2093 | |
|
|
2094 | /*****************************************************************************/ |
|
|
2095 | |
|
|
2096 | void |
|
|
2097 | ev_invoke (EV_P_ void *w, int revents) |
|
|
2098 | { |
|
|
2099 | EV_CB_INVOKE ((W)w, revents); |
|
|
2100 | } |
|
|
2101 | |
|
|
2102 | unsigned int |
|
|
2103 | ev_pending_count (EV_P) |
|
|
2104 | { |
|
|
2105 | int pri; |
|
|
2106 | unsigned int count = 0; |
|
|
2107 | |
|
|
2108 | for (pri = NUMPRI; pri--; ) |
|
|
2109 | count += pendingcnt [pri]; |
|
|
2110 | |
|
|
2111 | return count; |
|
|
2112 | } |
|
|
2113 | |
|
|
2114 | void noinline |
|
|
2115 | ev_invoke_pending (EV_P) |
|
|
2116 | { |
|
|
2117 | int pri; |
|
|
2118 | |
|
|
2119 | for (pri = NUMPRI; pri--; ) |
|
|
2120 | while (pendingcnt [pri]) |
|
|
2121 | { |
|
|
2122 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
|
|
2123 | |
|
|
2124 | p->w->pending = 0; |
|
|
2125 | EV_CB_INVOKE (p->w, p->events); |
|
|
2126 | EV_FREQUENT_CHECK; |
|
|
2127 | } |
|
|
2128 | } |
|
|
2129 | |
|
|
2130 | #if EV_IDLE_ENABLE |
|
|
2131 | /* make idle watchers pending. this handles the "call-idle */ |
|
|
2132 | /* only when higher priorities are idle" logic */ |
|
|
2133 | inline_size void |
|
|
2134 | idle_reify (EV_P) |
|
|
2135 | { |
|
|
2136 | if (expect_false (idleall)) |
|
|
2137 | { |
|
|
2138 | int pri; |
|
|
2139 | |
|
|
2140 | for (pri = NUMPRI; pri--; ) |
|
|
2141 | { |
|
|
2142 | if (pendingcnt [pri]) |
|
|
2143 | break; |
|
|
2144 | |
|
|
2145 | if (idlecnt [pri]) |
|
|
2146 | { |
|
|
2147 | queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
|
|
2148 | break; |
|
|
2149 | } |
|
|
2150 | } |
|
|
2151 | } |
|
|
2152 | } |
|
|
2153 | #endif |
|
|
2154 | |
|
|
2155 | /* make timers pending */ |
|
|
2156 | inline_size void |
448 | timers_reify () |
2157 | timers_reify (EV_P) |
449 | { |
2158 | { |
450 | while (timercnt && timers [0]->at <= now) |
2159 | EV_FREQUENT_CHECK; |
451 | { |
|
|
452 | struct ev_timer *w = timers [0]; |
|
|
453 | |
2160 | |
454 | event ((W)w, EV_TIMEOUT); |
2161 | if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) |
|
|
2162 | { |
|
|
2163 | do |
|
|
2164 | { |
|
|
2165 | ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); |
455 | |
2166 | |
|
|
2167 | /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ |
|
|
2168 | |
456 | /* first reschedule or stop timer */ |
2169 | /* first reschedule or stop timer */ |
|
|
2170 | if (w->repeat) |
|
|
2171 | { |
|
|
2172 | ev_at (w) += w->repeat; |
|
|
2173 | if (ev_at (w) < mn_now) |
|
|
2174 | ev_at (w) = mn_now; |
|
|
2175 | |
|
|
2176 | assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
|
|
2177 | |
|
|
2178 | ANHE_at_cache (timers [HEAP0]); |
|
|
2179 | downheap (timers, timercnt, HEAP0); |
|
|
2180 | } |
|
|
2181 | else |
|
|
2182 | ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
|
|
2183 | |
|
|
2184 | EV_FREQUENT_CHECK; |
|
|
2185 | feed_reverse (EV_A_ (W)w); |
|
|
2186 | } |
|
|
2187 | while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); |
|
|
2188 | |
|
|
2189 | feed_reverse_done (EV_A_ EV_TIMER); |
|
|
2190 | } |
|
|
2191 | } |
|
|
2192 | |
|
|
2193 | #if EV_PERIODIC_ENABLE |
|
|
2194 | /* make periodics pending */ |
|
|
2195 | inline_size void |
|
|
2196 | periodics_reify (EV_P) |
|
|
2197 | { |
|
|
2198 | EV_FREQUENT_CHECK; |
|
|
2199 | |
|
|
2200 | while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) |
|
|
2201 | { |
|
|
2202 | int feed_count = 0; |
|
|
2203 | |
|
|
2204 | do |
|
|
2205 | { |
|
|
2206 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); |
|
|
2207 | |
|
|
2208 | /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ |
|
|
2209 | |
|
|
2210 | /* first reschedule or stop timer */ |
|
|
2211 | if (w->reschedule_cb) |
|
|
2212 | { |
|
|
2213 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
|
|
2214 | |
|
|
2215 | assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); |
|
|
2216 | |
|
|
2217 | ANHE_at_cache (periodics [HEAP0]); |
|
|
2218 | downheap (periodics, periodiccnt, HEAP0); |
|
|
2219 | } |
|
|
2220 | else if (w->interval) |
|
|
2221 | { |
|
|
2222 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2223 | /* if next trigger time is not sufficiently in the future, put it there */ |
|
|
2224 | /* this might happen because of floating point inexactness */ |
|
|
2225 | if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
|
|
2226 | { |
|
|
2227 | ev_at (w) += w->interval; |
|
|
2228 | |
|
|
2229 | /* if interval is unreasonably low we might still have a time in the past */ |
|
|
2230 | /* so correct this. this will make the periodic very inexact, but the user */ |
|
|
2231 | /* has effectively asked to get triggered more often than possible */ |
|
|
2232 | if (ev_at (w) < ev_rt_now) |
|
|
2233 | ev_at (w) = ev_rt_now; |
|
|
2234 | } |
|
|
2235 | |
|
|
2236 | ANHE_at_cache (periodics [HEAP0]); |
|
|
2237 | downheap (periodics, periodiccnt, HEAP0); |
|
|
2238 | } |
|
|
2239 | else |
|
|
2240 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
|
|
2241 | |
|
|
2242 | EV_FREQUENT_CHECK; |
|
|
2243 | feed_reverse (EV_A_ (W)w); |
|
|
2244 | } |
|
|
2245 | while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); |
|
|
2246 | |
|
|
2247 | feed_reverse_done (EV_A_ EV_PERIODIC); |
|
|
2248 | } |
|
|
2249 | } |
|
|
2250 | |
|
|
2251 | /* simply recalculate all periodics */ |
|
|
2252 | /* TODO: maybe ensure that at least one event happens when jumping forward? */ |
|
|
2253 | static void noinline |
|
|
2254 | periodics_reschedule (EV_P) |
|
|
2255 | { |
|
|
2256 | int i; |
|
|
2257 | |
|
|
2258 | /* adjust periodics after time jump */ |
|
|
2259 | for (i = HEAP0; i < periodiccnt + HEAP0; ++i) |
|
|
2260 | { |
|
|
2261 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
|
|
2262 | |
|
|
2263 | if (w->reschedule_cb) |
|
|
2264 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
|
|
2265 | else if (w->interval) |
|
|
2266 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2267 | |
|
|
2268 | ANHE_at_cache (periodics [i]); |
|
|
2269 | } |
|
|
2270 | |
|
|
2271 | reheap (periodics, periodiccnt); |
|
|
2272 | } |
|
|
2273 | #endif |
|
|
2274 | |
|
|
2275 | /* adjust all timers by a given offset */ |
|
|
2276 | static void noinline |
|
|
2277 | timers_reschedule (EV_P_ ev_tstamp adjust) |
|
|
2278 | { |
|
|
2279 | int i; |
|
|
2280 | |
|
|
2281 | for (i = 0; i < timercnt; ++i) |
|
|
2282 | { |
|
|
2283 | ANHE *he = timers + i + HEAP0; |
|
|
2284 | ANHE_w (*he)->at += adjust; |
|
|
2285 | ANHE_at_cache (*he); |
|
|
2286 | } |
|
|
2287 | } |
|
|
2288 | |
|
|
2289 | /* fetch new monotonic and realtime times from the kernel */ |
|
|
2290 | /* also detect if there was a timejump, and act accordingly */ |
|
|
2291 | inline_speed void |
|
|
2292 | time_update (EV_P_ ev_tstamp max_block) |
|
|
2293 | { |
|
|
2294 | #if EV_USE_MONOTONIC |
|
|
2295 | if (expect_true (have_monotonic)) |
|
|
2296 | { |
|
|
2297 | int i; |
|
|
2298 | ev_tstamp odiff = rtmn_diff; |
|
|
2299 | |
|
|
2300 | mn_now = get_clock (); |
|
|
2301 | |
|
|
2302 | /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
|
|
2303 | /* interpolate in the meantime */ |
|
|
2304 | if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
2305 | { |
|
|
2306 | ev_rt_now = rtmn_diff + mn_now; |
|
|
2307 | return; |
|
|
2308 | } |
|
|
2309 | |
|
|
2310 | now_floor = mn_now; |
|
|
2311 | ev_rt_now = ev_time (); |
|
|
2312 | |
|
|
2313 | /* loop a few times, before making important decisions. |
|
|
2314 | * on the choice of "4": one iteration isn't enough, |
|
|
2315 | * in case we get preempted during the calls to |
|
|
2316 | * ev_time and get_clock. a second call is almost guaranteed |
|
|
2317 | * to succeed in that case, though. and looping a few more times |
|
|
2318 | * doesn't hurt either as we only do this on time-jumps or |
|
|
2319 | * in the unlikely event of having been preempted here. |
|
|
2320 | */ |
|
|
2321 | for (i = 4; --i; ) |
|
|
2322 | { |
|
|
2323 | rtmn_diff = ev_rt_now - mn_now; |
|
|
2324 | |
|
|
2325 | if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) |
|
|
2326 | return; /* all is well */ |
|
|
2327 | |
|
|
2328 | ev_rt_now = ev_time (); |
|
|
2329 | mn_now = get_clock (); |
|
|
2330 | now_floor = mn_now; |
|
|
2331 | } |
|
|
2332 | |
|
|
2333 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
2334 | /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
|
|
2335 | # if EV_PERIODIC_ENABLE |
|
|
2336 | periodics_reschedule (EV_A); |
|
|
2337 | # endif |
|
|
2338 | } |
|
|
2339 | else |
|
|
2340 | #endif |
|
|
2341 | { |
|
|
2342 | ev_rt_now = ev_time (); |
|
|
2343 | |
|
|
2344 | if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
|
|
2345 | { |
|
|
2346 | /* adjust timers. this is easy, as the offset is the same for all of them */ |
|
|
2347 | timers_reschedule (EV_A_ ev_rt_now - mn_now); |
|
|
2348 | #if EV_PERIODIC_ENABLE |
|
|
2349 | periodics_reschedule (EV_A); |
|
|
2350 | #endif |
|
|
2351 | } |
|
|
2352 | |
|
|
2353 | mn_now = ev_rt_now; |
|
|
2354 | } |
|
|
2355 | } |
|
|
2356 | |
|
|
2357 | void |
|
|
2358 | ev_run (EV_P_ int flags) |
|
|
2359 | { |
|
|
2360 | #if EV_FEATURE_API |
|
|
2361 | ++loop_depth; |
|
|
2362 | #endif |
|
|
2363 | |
|
|
2364 | assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE)); |
|
|
2365 | |
|
|
2366 | loop_done = EVBREAK_CANCEL; |
|
|
2367 | |
|
|
2368 | EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ |
|
|
2369 | |
|
|
2370 | do |
|
|
2371 | { |
|
|
2372 | #if EV_VERIFY >= 2 |
|
|
2373 | ev_verify (EV_A); |
|
|
2374 | #endif |
|
|
2375 | |
|
|
2376 | #ifndef _WIN32 |
|
|
2377 | if (expect_false (curpid)) /* penalise the forking check even more */ |
|
|
2378 | if (expect_false (getpid () != curpid)) |
|
|
2379 | { |
|
|
2380 | curpid = getpid (); |
|
|
2381 | postfork = 1; |
|
|
2382 | } |
|
|
2383 | #endif |
|
|
2384 | |
|
|
2385 | #if EV_FORK_ENABLE |
|
|
2386 | /* we might have forked, so queue fork handlers */ |
|
|
2387 | if (expect_false (postfork)) |
|
|
2388 | if (forkcnt) |
|
|
2389 | { |
|
|
2390 | queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
|
|
2391 | EV_INVOKE_PENDING; |
|
|
2392 | } |
|
|
2393 | #endif |
|
|
2394 | |
|
|
2395 | #if EV_PREPARE_ENABLE |
|
|
2396 | /* queue prepare watchers (and execute them) */ |
|
|
2397 | if (expect_false (preparecnt)) |
|
|
2398 | { |
|
|
2399 | queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
|
|
2400 | EV_INVOKE_PENDING; |
|
|
2401 | } |
|
|
2402 | #endif |
|
|
2403 | |
|
|
2404 | if (expect_false (loop_done)) |
|
|
2405 | break; |
|
|
2406 | |
|
|
2407 | /* we might have forked, so reify kernel state if necessary */ |
|
|
2408 | if (expect_false (postfork)) |
|
|
2409 | loop_fork (EV_A); |
|
|
2410 | |
|
|
2411 | /* update fd-related kernel structures */ |
|
|
2412 | fd_reify (EV_A); |
|
|
2413 | |
|
|
2414 | /* calculate blocking time */ |
|
|
2415 | { |
|
|
2416 | ev_tstamp waittime = 0.; |
|
|
2417 | ev_tstamp sleeptime = 0.; |
|
|
2418 | |
|
|
2419 | /* remember old timestamp for io_blocktime calculation */ |
|
|
2420 | ev_tstamp prev_mn_now = mn_now; |
|
|
2421 | |
|
|
2422 | /* update time to cancel out callback processing overhead */ |
|
|
2423 | time_update (EV_A_ 1e100); |
|
|
2424 | |
|
|
2425 | if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) |
|
|
2426 | { |
|
|
2427 | waittime = MAX_BLOCKTIME; |
|
|
2428 | |
|
|
2429 | if (timercnt) |
|
|
2430 | { |
|
|
2431 | ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; |
|
|
2432 | if (waittime > to) waittime = to; |
|
|
2433 | } |
|
|
2434 | |
|
|
2435 | #if EV_PERIODIC_ENABLE |
|
|
2436 | if (periodiccnt) |
|
|
2437 | { |
|
|
2438 | ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; |
|
|
2439 | if (waittime > to) waittime = to; |
|
|
2440 | } |
|
|
2441 | #endif |
|
|
2442 | |
|
|
2443 | /* don't let timeouts decrease the waittime below timeout_blocktime */ |
|
|
2444 | if (expect_false (waittime < timeout_blocktime)) |
|
|
2445 | waittime = timeout_blocktime; |
|
|
2446 | |
|
|
2447 | /* extra check because io_blocktime is commonly 0 */ |
|
|
2448 | if (expect_false (io_blocktime)) |
|
|
2449 | { |
|
|
2450 | sleeptime = io_blocktime - (mn_now - prev_mn_now); |
|
|
2451 | |
|
|
2452 | if (sleeptime > waittime - backend_fudge) |
|
|
2453 | sleeptime = waittime - backend_fudge; |
|
|
2454 | |
|
|
2455 | if (expect_true (sleeptime > 0.)) |
|
|
2456 | { |
|
|
2457 | ev_sleep (sleeptime); |
|
|
2458 | waittime -= sleeptime; |
|
|
2459 | } |
|
|
2460 | } |
|
|
2461 | } |
|
|
2462 | |
|
|
2463 | #if EV_FEATURE_API |
|
|
2464 | ++loop_count; |
|
|
2465 | #endif |
|
|
2466 | assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ |
|
|
2467 | backend_poll (EV_A_ waittime); |
|
|
2468 | assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ |
|
|
2469 | |
|
|
2470 | /* update ev_rt_now, do magic */ |
|
|
2471 | time_update (EV_A_ waittime + sleeptime); |
|
|
2472 | } |
|
|
2473 | |
|
|
2474 | /* queue pending timers and reschedule them */ |
|
|
2475 | timers_reify (EV_A); /* relative timers called last */ |
|
|
2476 | #if EV_PERIODIC_ENABLE |
|
|
2477 | periodics_reify (EV_A); /* absolute timers called first */ |
|
|
2478 | #endif |
|
|
2479 | |
|
|
2480 | #if EV_IDLE_ENABLE |
|
|
2481 | /* queue idle watchers unless other events are pending */ |
|
|
2482 | idle_reify (EV_A); |
|
|
2483 | #endif |
|
|
2484 | |
|
|
2485 | #if EV_CHECK_ENABLE |
|
|
2486 | /* queue check watchers, to be executed first */ |
|
|
2487 | if (expect_false (checkcnt)) |
|
|
2488 | queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
|
|
2489 | #endif |
|
|
2490 | |
|
|
2491 | EV_INVOKE_PENDING; |
|
|
2492 | } |
|
|
2493 | while (expect_true ( |
|
|
2494 | activecnt |
|
|
2495 | && !loop_done |
|
|
2496 | && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT)) |
|
|
2497 | )); |
|
|
2498 | |
|
|
2499 | if (loop_done == EVBREAK_ONE) |
|
|
2500 | loop_done = EVBREAK_CANCEL; |
|
|
2501 | |
|
|
2502 | #if EV_FEATURE_API |
|
|
2503 | --loop_depth; |
|
|
2504 | #endif |
|
|
2505 | } |
|
|
2506 | |
|
|
2507 | void |
|
|
2508 | ev_break (EV_P_ int how) |
|
|
2509 | { |
|
|
2510 | loop_done = how; |
|
|
2511 | } |
|
|
2512 | |
|
|
2513 | void |
|
|
2514 | ev_ref (EV_P) |
|
|
2515 | { |
|
|
2516 | ++activecnt; |
|
|
2517 | } |
|
|
2518 | |
|
|
2519 | void |
|
|
2520 | ev_unref (EV_P) |
|
|
2521 | { |
|
|
2522 | --activecnt; |
|
|
2523 | } |
|
|
2524 | |
|
|
2525 | void |
|
|
2526 | ev_now_update (EV_P) |
|
|
2527 | { |
|
|
2528 | time_update (EV_A_ 1e100); |
|
|
2529 | } |
|
|
2530 | |
|
|
2531 | void |
|
|
2532 | ev_suspend (EV_P) |
|
|
2533 | { |
|
|
2534 | ev_now_update (EV_A); |
|
|
2535 | } |
|
|
2536 | |
|
|
2537 | void |
|
|
2538 | ev_resume (EV_P) |
|
|
2539 | { |
|
|
2540 | ev_tstamp mn_prev = mn_now; |
|
|
2541 | |
|
|
2542 | ev_now_update (EV_A); |
|
|
2543 | timers_reschedule (EV_A_ mn_now - mn_prev); |
|
|
2544 | #if EV_PERIODIC_ENABLE |
|
|
2545 | /* TODO: really do this? */ |
|
|
2546 | periodics_reschedule (EV_A); |
|
|
2547 | #endif |
|
|
2548 | } |
|
|
2549 | |
|
|
2550 | /*****************************************************************************/ |
|
|
2551 | /* singly-linked list management, used when the expected list length is short */ |
|
|
2552 | |
|
|
2553 | inline_size void |
|
|
2554 | wlist_add (WL *head, WL elem) |
|
|
2555 | { |
|
|
2556 | elem->next = *head; |
|
|
2557 | *head = elem; |
|
|
2558 | } |
|
|
2559 | |
|
|
2560 | inline_size void |
|
|
2561 | wlist_del (WL *head, WL elem) |
|
|
2562 | { |
|
|
2563 | while (*head) |
|
|
2564 | { |
|
|
2565 | if (expect_true (*head == elem)) |
|
|
2566 | { |
|
|
2567 | *head = elem->next; |
|
|
2568 | break; |
|
|
2569 | } |
|
|
2570 | |
|
|
2571 | head = &(*head)->next; |
|
|
2572 | } |
|
|
2573 | } |
|
|
2574 | |
|
|
2575 | /* internal, faster, version of ev_clear_pending */ |
|
|
2576 | inline_speed void |
|
|
2577 | clear_pending (EV_P_ W w) |
|
|
2578 | { |
|
|
2579 | if (w->pending) |
|
|
2580 | { |
|
|
2581 | pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; |
|
|
2582 | w->pending = 0; |
|
|
2583 | } |
|
|
2584 | } |
|
|
2585 | |
|
|
2586 | int |
|
|
2587 | ev_clear_pending (EV_P_ void *w) |
|
|
2588 | { |
|
|
2589 | W w_ = (W)w; |
|
|
2590 | int pending = w_->pending; |
|
|
2591 | |
|
|
2592 | if (expect_true (pending)) |
|
|
2593 | { |
|
|
2594 | ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
|
|
2595 | p->w = (W)&pending_w; |
|
|
2596 | w_->pending = 0; |
|
|
2597 | return p->events; |
|
|
2598 | } |
|
|
2599 | else |
|
|
2600 | return 0; |
|
|
2601 | } |
|
|
2602 | |
|
|
2603 | inline_size void |
|
|
2604 | pri_adjust (EV_P_ W w) |
|
|
2605 | { |
|
|
2606 | int pri = ev_priority (w); |
|
|
2607 | pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
|
|
2608 | pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
|
|
2609 | ev_set_priority (w, pri); |
|
|
2610 | } |
|
|
2611 | |
|
|
2612 | inline_speed void |
|
|
2613 | ev_start (EV_P_ W w, int active) |
|
|
2614 | { |
|
|
2615 | pri_adjust (EV_A_ w); |
|
|
2616 | w->active = active; |
|
|
2617 | ev_ref (EV_A); |
|
|
2618 | } |
|
|
2619 | |
|
|
2620 | inline_size void |
|
|
2621 | ev_stop (EV_P_ W w) |
|
|
2622 | { |
|
|
2623 | ev_unref (EV_A); |
|
|
2624 | w->active = 0; |
|
|
2625 | } |
|
|
2626 | |
|
|
2627 | /*****************************************************************************/ |
|
|
2628 | |
|
|
2629 | void noinline |
|
|
2630 | ev_io_start (EV_P_ ev_io *w) |
|
|
2631 | { |
|
|
2632 | int fd = w->fd; |
|
|
2633 | |
|
|
2634 | if (expect_false (ev_is_active (w))) |
|
|
2635 | return; |
|
|
2636 | |
|
|
2637 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
|
|
2638 | assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
|
|
2639 | |
|
|
2640 | EV_FREQUENT_CHECK; |
|
|
2641 | |
|
|
2642 | ev_start (EV_A_ (W)w, 1); |
|
|
2643 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
|
|
2644 | wlist_add (&anfds[fd].head, (WL)w); |
|
|
2645 | |
|
|
2646 | fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); |
|
|
2647 | w->events &= ~EV__IOFDSET; |
|
|
2648 | |
|
|
2649 | EV_FREQUENT_CHECK; |
|
|
2650 | } |
|
|
2651 | |
|
|
2652 | void noinline |
|
|
2653 | ev_io_stop (EV_P_ ev_io *w) |
|
|
2654 | { |
|
|
2655 | clear_pending (EV_A_ (W)w); |
|
|
2656 | if (expect_false (!ev_is_active (w))) |
|
|
2657 | return; |
|
|
2658 | |
|
|
2659 | assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
|
|
2660 | |
|
|
2661 | EV_FREQUENT_CHECK; |
|
|
2662 | |
|
|
2663 | wlist_del (&anfds[w->fd].head, (WL)w); |
|
|
2664 | ev_stop (EV_A_ (W)w); |
|
|
2665 | |
|
|
2666 | fd_change (EV_A_ w->fd, EV_ANFD_REIFY); |
|
|
2667 | |
|
|
2668 | EV_FREQUENT_CHECK; |
|
|
2669 | } |
|
|
2670 | |
|
|
2671 | void noinline |
|
|
2672 | ev_timer_start (EV_P_ ev_timer *w) |
|
|
2673 | { |
|
|
2674 | if (expect_false (ev_is_active (w))) |
|
|
2675 | return; |
|
|
2676 | |
|
|
2677 | ev_at (w) += mn_now; |
|
|
2678 | |
|
|
2679 | assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
|
|
2680 | |
|
|
2681 | EV_FREQUENT_CHECK; |
|
|
2682 | |
|
|
2683 | ++timercnt; |
|
|
2684 | ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); |
|
|
2685 | array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); |
|
|
2686 | ANHE_w (timers [ev_active (w)]) = (WT)w; |
|
|
2687 | ANHE_at_cache (timers [ev_active (w)]); |
|
|
2688 | upheap (timers, ev_active (w)); |
|
|
2689 | |
|
|
2690 | EV_FREQUENT_CHECK; |
|
|
2691 | |
|
|
2692 | /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ |
|
|
2693 | } |
|
|
2694 | |
|
|
2695 | void noinline |
|
|
2696 | ev_timer_stop (EV_P_ ev_timer *w) |
|
|
2697 | { |
|
|
2698 | clear_pending (EV_A_ (W)w); |
|
|
2699 | if (expect_false (!ev_is_active (w))) |
|
|
2700 | return; |
|
|
2701 | |
|
|
2702 | EV_FREQUENT_CHECK; |
|
|
2703 | |
|
|
2704 | { |
|
|
2705 | int active = ev_active (w); |
|
|
2706 | |
|
|
2707 | assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); |
|
|
2708 | |
|
|
2709 | --timercnt; |
|
|
2710 | |
|
|
2711 | if (expect_true (active < timercnt + HEAP0)) |
|
|
2712 | { |
|
|
2713 | timers [active] = timers [timercnt + HEAP0]; |
|
|
2714 | adjustheap (timers, timercnt, active); |
|
|
2715 | } |
|
|
2716 | } |
|
|
2717 | |
|
|
2718 | ev_at (w) -= mn_now; |
|
|
2719 | |
|
|
2720 | ev_stop (EV_A_ (W)w); |
|
|
2721 | |
|
|
2722 | EV_FREQUENT_CHECK; |
|
|
2723 | } |
|
|
2724 | |
|
|
2725 | void noinline |
|
|
2726 | ev_timer_again (EV_P_ ev_timer *w) |
|
|
2727 | { |
|
|
2728 | EV_FREQUENT_CHECK; |
|
|
2729 | |
|
|
2730 | if (ev_is_active (w)) |
|
|
2731 | { |
457 | if (w->repeat) |
2732 | if (w->repeat) |
458 | { |
2733 | { |
459 | w->at = now + w->repeat; |
2734 | ev_at (w) = mn_now + w->repeat; |
460 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
2735 | ANHE_at_cache (timers [ev_active (w)]); |
461 | downheap ((WT *)timers, timercnt, 0); |
2736 | adjustheap (timers, timercnt, ev_active (w)); |
462 | } |
2737 | } |
463 | else |
2738 | else |
464 | evtimer_stop (w); /* nonrepeating: stop timer */ |
2739 | ev_timer_stop (EV_A_ w); |
465 | } |
|
|
466 | } |
|
|
467 | |
|
|
468 | static void |
|
|
469 | periodics_reify () |
|
|
470 | { |
|
|
471 | while (periodiccnt && periodics [0]->at <= ev_now) |
|
|
472 | { |
2740 | } |
473 | struct ev_periodic *w = periodics [0]; |
2741 | else if (w->repeat) |
|
|
2742 | { |
|
|
2743 | ev_at (w) = w->repeat; |
|
|
2744 | ev_timer_start (EV_A_ w); |
|
|
2745 | } |
474 | |
2746 | |
475 | /* first reschedule or stop timer */ |
2747 | EV_FREQUENT_CHECK; |
|
|
2748 | } |
|
|
2749 | |
|
|
2750 | ev_tstamp |
|
|
2751 | ev_timer_remaining (EV_P_ ev_timer *w) |
|
|
2752 | { |
|
|
2753 | return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); |
|
|
2754 | } |
|
|
2755 | |
|
|
2756 | #if EV_PERIODIC_ENABLE |
|
|
2757 | void noinline |
|
|
2758 | ev_periodic_start (EV_P_ ev_periodic *w) |
|
|
2759 | { |
|
|
2760 | if (expect_false (ev_is_active (w))) |
|
|
2761 | return; |
|
|
2762 | |
|
|
2763 | if (w->reschedule_cb) |
|
|
2764 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
476 | if (w->interval) |
2765 | else if (w->interval) |
|
|
2766 | { |
|
|
2767 | assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
|
|
2768 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
2769 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2770 | } |
|
|
2771 | else |
|
|
2772 | ev_at (w) = w->offset; |
|
|
2773 | |
|
|
2774 | EV_FREQUENT_CHECK; |
|
|
2775 | |
|
|
2776 | ++periodiccnt; |
|
|
2777 | ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); |
|
|
2778 | array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); |
|
|
2779 | ANHE_w (periodics [ev_active (w)]) = (WT)w; |
|
|
2780 | ANHE_at_cache (periodics [ev_active (w)]); |
|
|
2781 | upheap (periodics, ev_active (w)); |
|
|
2782 | |
|
|
2783 | EV_FREQUENT_CHECK; |
|
|
2784 | |
|
|
2785 | /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ |
|
|
2786 | } |
|
|
2787 | |
|
|
2788 | void noinline |
|
|
2789 | ev_periodic_stop (EV_P_ ev_periodic *w) |
|
|
2790 | { |
|
|
2791 | clear_pending (EV_A_ (W)w); |
|
|
2792 | if (expect_false (!ev_is_active (w))) |
|
|
2793 | return; |
|
|
2794 | |
|
|
2795 | EV_FREQUENT_CHECK; |
|
|
2796 | |
|
|
2797 | { |
|
|
2798 | int active = ev_active (w); |
|
|
2799 | |
|
|
2800 | assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); |
|
|
2801 | |
|
|
2802 | --periodiccnt; |
|
|
2803 | |
|
|
2804 | if (expect_true (active < periodiccnt + HEAP0)) |
|
|
2805 | { |
|
|
2806 | periodics [active] = periodics [periodiccnt + HEAP0]; |
|
|
2807 | adjustheap (periodics, periodiccnt, active); |
|
|
2808 | } |
|
|
2809 | } |
|
|
2810 | |
|
|
2811 | ev_stop (EV_A_ (W)w); |
|
|
2812 | |
|
|
2813 | EV_FREQUENT_CHECK; |
|
|
2814 | } |
|
|
2815 | |
|
|
2816 | void noinline |
|
|
2817 | ev_periodic_again (EV_P_ ev_periodic *w) |
|
|
2818 | { |
|
|
2819 | /* TODO: use adjustheap and recalculation */ |
|
|
2820 | ev_periodic_stop (EV_A_ w); |
|
|
2821 | ev_periodic_start (EV_A_ w); |
|
|
2822 | } |
|
|
2823 | #endif |
|
|
2824 | |
|
|
2825 | #ifndef SA_RESTART |
|
|
2826 | # define SA_RESTART 0 |
|
|
2827 | #endif |
|
|
2828 | |
|
|
2829 | #if EV_SIGNAL_ENABLE |
|
|
2830 | |
|
|
2831 | void noinline |
|
|
2832 | ev_signal_start (EV_P_ ev_signal *w) |
|
|
2833 | { |
|
|
2834 | if (expect_false (ev_is_active (w))) |
|
|
2835 | return; |
|
|
2836 | |
|
|
2837 | assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); |
|
|
2838 | |
|
|
2839 | #if EV_MULTIPLICITY |
|
|
2840 | assert (("libev: a signal must not be attached to two different loops", |
|
|
2841 | !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); |
|
|
2842 | |
|
|
2843 | signals [w->signum - 1].loop = EV_A; |
|
|
2844 | #endif |
|
|
2845 | |
|
|
2846 | EV_FREQUENT_CHECK; |
|
|
2847 | |
|
|
2848 | #if EV_USE_SIGNALFD |
|
|
2849 | if (sigfd == -2) |
|
|
2850 | { |
|
|
2851 | sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); |
|
|
2852 | if (sigfd < 0 && errno == EINVAL) |
|
|
2853 | sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ |
|
|
2854 | |
|
|
2855 | if (sigfd >= 0) |
477 | { |
2856 | { |
478 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
2857 | fd_intern (sigfd); /* doing it twice will not hurt */ |
479 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
2858 | |
480 | downheap ((WT *)periodics, periodiccnt, 0); |
2859 | sigemptyset (&sigfd_set); |
|
|
2860 | |
|
|
2861 | ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); |
|
|
2862 | ev_set_priority (&sigfd_w, EV_MAXPRI); |
|
|
2863 | ev_io_start (EV_A_ &sigfd_w); |
|
|
2864 | ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ |
|
|
2865 | } |
|
|
2866 | } |
|
|
2867 | |
|
|
2868 | if (sigfd >= 0) |
|
|
2869 | { |
|
|
2870 | /* TODO: check .head */ |
|
|
2871 | sigaddset (&sigfd_set, w->signum); |
|
|
2872 | sigprocmask (SIG_BLOCK, &sigfd_set, 0); |
|
|
2873 | |
|
|
2874 | signalfd (sigfd, &sigfd_set, 0); |
|
|
2875 | } |
|
|
2876 | #endif |
|
|
2877 | |
|
|
2878 | ev_start (EV_A_ (W)w, 1); |
|
|
2879 | wlist_add (&signals [w->signum - 1].head, (WL)w); |
|
|
2880 | |
|
|
2881 | if (!((WL)w)->next) |
|
|
2882 | # if EV_USE_SIGNALFD |
|
|
2883 | if (sigfd < 0) /*TODO*/ |
|
|
2884 | # endif |
|
|
2885 | { |
|
|
2886 | # ifdef _WIN32 |
|
|
2887 | evpipe_init (EV_A); |
|
|
2888 | |
|
|
2889 | signal (w->signum, ev_sighandler); |
|
|
2890 | # else |
|
|
2891 | struct sigaction sa; |
|
|
2892 | |
|
|
2893 | evpipe_init (EV_A); |
|
|
2894 | |
|
|
2895 | sa.sa_handler = ev_sighandler; |
|
|
2896 | sigfillset (&sa.sa_mask); |
|
|
2897 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
|
|
2898 | sigaction (w->signum, &sa, 0); |
|
|
2899 | |
|
|
2900 | if (origflags & EVFLAG_NOSIGMASK) |
|
|
2901 | { |
|
|
2902 | sigemptyset (&sa.sa_mask); |
|
|
2903 | sigaddset (&sa.sa_mask, w->signum); |
|
|
2904 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
|
|
2905 | } |
|
|
2906 | #endif |
|
|
2907 | } |
|
|
2908 | |
|
|
2909 | EV_FREQUENT_CHECK; |
|
|
2910 | } |
|
|
2911 | |
|
|
2912 | void noinline |
|
|
2913 | ev_signal_stop (EV_P_ ev_signal *w) |
|
|
2914 | { |
|
|
2915 | clear_pending (EV_A_ (W)w); |
|
|
2916 | if (expect_false (!ev_is_active (w))) |
|
|
2917 | return; |
|
|
2918 | |
|
|
2919 | EV_FREQUENT_CHECK; |
|
|
2920 | |
|
|
2921 | wlist_del (&signals [w->signum - 1].head, (WL)w); |
|
|
2922 | ev_stop (EV_A_ (W)w); |
|
|
2923 | |
|
|
2924 | if (!signals [w->signum - 1].head) |
|
|
2925 | { |
|
|
2926 | #if EV_MULTIPLICITY |
|
|
2927 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
|
|
2928 | #endif |
|
|
2929 | #if EV_USE_SIGNALFD |
|
|
2930 | if (sigfd >= 0) |
|
|
2931 | { |
|
|
2932 | sigset_t ss; |
|
|
2933 | |
|
|
2934 | sigemptyset (&ss); |
|
|
2935 | sigaddset (&ss, w->signum); |
|
|
2936 | sigdelset (&sigfd_set, w->signum); |
|
|
2937 | |
|
|
2938 | signalfd (sigfd, &sigfd_set, 0); |
|
|
2939 | sigprocmask (SIG_UNBLOCK, &ss, 0); |
481 | } |
2940 | } |
482 | else |
2941 | else |
483 | evperiodic_stop (w); /* nonrepeating: stop timer */ |
2942 | #endif |
484 | |
2943 | signal (w->signum, SIG_DFL); |
485 | event ((W)w, EV_TIMEOUT); |
|
|
486 | } |
|
|
487 | } |
|
|
488 | |
|
|
489 | static void |
|
|
490 | periodics_reschedule (ev_tstamp diff) |
|
|
491 | { |
|
|
492 | int i; |
|
|
493 | |
|
|
494 | /* adjust periodics after time jump */ |
|
|
495 | for (i = 0; i < periodiccnt; ++i) |
|
|
496 | { |
2944 | } |
497 | struct ev_periodic *w = periodics [i]; |
|
|
498 | |
2945 | |
499 | if (w->interval) |
2946 | EV_FREQUENT_CHECK; |
|
|
2947 | } |
|
|
2948 | |
|
|
2949 | #endif |
|
|
2950 | |
|
|
2951 | #if EV_CHILD_ENABLE |
|
|
2952 | |
|
|
2953 | void |
|
|
2954 | ev_child_start (EV_P_ ev_child *w) |
|
|
2955 | { |
|
|
2956 | #if EV_MULTIPLICITY |
|
|
2957 | assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
|
|
2958 | #endif |
|
|
2959 | if (expect_false (ev_is_active (w))) |
|
|
2960 | return; |
|
|
2961 | |
|
|
2962 | EV_FREQUENT_CHECK; |
|
|
2963 | |
|
|
2964 | ev_start (EV_A_ (W)w, 1); |
|
|
2965 | wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
|
|
2966 | |
|
|
2967 | EV_FREQUENT_CHECK; |
|
|
2968 | } |
|
|
2969 | |
|
|
2970 | void |
|
|
2971 | ev_child_stop (EV_P_ ev_child *w) |
|
|
2972 | { |
|
|
2973 | clear_pending (EV_A_ (W)w); |
|
|
2974 | if (expect_false (!ev_is_active (w))) |
|
|
2975 | return; |
|
|
2976 | |
|
|
2977 | EV_FREQUENT_CHECK; |
|
|
2978 | |
|
|
2979 | wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
|
|
2980 | ev_stop (EV_A_ (W)w); |
|
|
2981 | |
|
|
2982 | EV_FREQUENT_CHECK; |
|
|
2983 | } |
|
|
2984 | |
|
|
2985 | #endif |
|
|
2986 | |
|
|
2987 | #if EV_STAT_ENABLE |
|
|
2988 | |
|
|
2989 | # ifdef _WIN32 |
|
|
2990 | # undef lstat |
|
|
2991 | # define lstat(a,b) _stati64 (a,b) |
|
|
2992 | # endif |
|
|
2993 | |
|
|
2994 | #define DEF_STAT_INTERVAL 5.0074891 |
|
|
2995 | #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ |
|
|
2996 | #define MIN_STAT_INTERVAL 0.1074891 |
|
|
2997 | |
|
|
2998 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
|
|
2999 | |
|
|
3000 | #if EV_USE_INOTIFY |
|
|
3001 | |
|
|
3002 | /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
|
|
3003 | # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
|
|
3004 | |
|
|
3005 | static void noinline |
|
|
3006 | infy_add (EV_P_ ev_stat *w) |
|
|
3007 | { |
|
|
3008 | w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); |
|
|
3009 | |
|
|
3010 | if (w->wd >= 0) |
|
|
3011 | { |
|
|
3012 | struct statfs sfs; |
|
|
3013 | |
|
|
3014 | /* now local changes will be tracked by inotify, but remote changes won't */ |
|
|
3015 | /* unless the filesystem is known to be local, we therefore still poll */ |
|
|
3016 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
3017 | |
|
|
3018 | if (!fs_2625) |
|
|
3019 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3020 | else if (!statfs (w->path, &sfs) |
|
|
3021 | && (sfs.f_type == 0x1373 /* devfs */ |
|
|
3022 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
3023 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
3024 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
3025 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
3026 | || sfs.f_type == 0x58465342 /* xfs */)) |
|
|
3027 | w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
|
|
3028 | else |
|
|
3029 | w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
|
|
3030 | } |
|
|
3031 | else |
|
|
3032 | { |
|
|
3033 | /* can't use inotify, continue to stat */ |
|
|
3034 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3035 | |
|
|
3036 | /* if path is not there, monitor some parent directory for speedup hints */ |
|
|
3037 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
|
|
3038 | /* but an efficiency issue only */ |
|
|
3039 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
500 | { |
3040 | { |
501 | ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
3041 | char path [4096]; |
|
|
3042 | strcpy (path, w->path); |
502 | |
3043 | |
503 | if (fabs (diff) >= 1e-4) |
3044 | do |
504 | { |
3045 | { |
505 | evperiodic_stop (w); |
3046 | int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
506 | evperiodic_start (w); |
3047 | | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
507 | |
3048 | |
508 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
3049 | char *pend = strrchr (path, '/'); |
|
|
3050 | |
|
|
3051 | if (!pend || pend == path) |
|
|
3052 | break; |
|
|
3053 | |
|
|
3054 | *pend = 0; |
|
|
3055 | w->wd = inotify_add_watch (fs_fd, path, mask); |
|
|
3056 | } |
|
|
3057 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
|
|
3058 | } |
|
|
3059 | } |
|
|
3060 | |
|
|
3061 | if (w->wd >= 0) |
|
|
3062 | wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
|
|
3063 | |
|
|
3064 | /* now re-arm timer, if required */ |
|
|
3065 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
|
|
3066 | ev_timer_again (EV_A_ &w->timer); |
|
|
3067 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
3068 | } |
|
|
3069 | |
|
|
3070 | static void noinline |
|
|
3071 | infy_del (EV_P_ ev_stat *w) |
|
|
3072 | { |
|
|
3073 | int slot; |
|
|
3074 | int wd = w->wd; |
|
|
3075 | |
|
|
3076 | if (wd < 0) |
|
|
3077 | return; |
|
|
3078 | |
|
|
3079 | w->wd = -2; |
|
|
3080 | slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); |
|
|
3081 | wlist_del (&fs_hash [slot].head, (WL)w); |
|
|
3082 | |
|
|
3083 | /* remove this watcher, if others are watching it, they will rearm */ |
|
|
3084 | inotify_rm_watch (fs_fd, wd); |
|
|
3085 | } |
|
|
3086 | |
|
|
3087 | static void noinline |
|
|
3088 | infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
|
|
3089 | { |
|
|
3090 | if (slot < 0) |
|
|
3091 | /* overflow, need to check for all hash slots */ |
|
|
3092 | for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
|
|
3093 | infy_wd (EV_A_ slot, wd, ev); |
|
|
3094 | else |
|
|
3095 | { |
|
|
3096 | WL w_; |
|
|
3097 | |
|
|
3098 | for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) |
|
|
3099 | { |
|
|
3100 | ev_stat *w = (ev_stat *)w_; |
|
|
3101 | w_ = w_->next; /* lets us remove this watcher and all before it */ |
|
|
3102 | |
|
|
3103 | if (w->wd == wd || wd == -1) |
|
|
3104 | { |
|
|
3105 | if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
|
|
3106 | { |
|
|
3107 | wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
|
|
3108 | w->wd = -1; |
|
|
3109 | infy_add (EV_A_ w); /* re-add, no matter what */ |
|
|
3110 | } |
|
|
3111 | |
|
|
3112 | stat_timer_cb (EV_A_ &w->timer, 0); |
509 | } |
3113 | } |
510 | } |
3114 | } |
511 | } |
3115 | } |
512 | } |
3116 | } |
513 | |
3117 | |
514 | static void |
3118 | static void |
515 | time_update () |
3119 | infy_cb (EV_P_ ev_io *w, int revents) |
516 | { |
3120 | { |
|
|
3121 | char buf [EV_INOTIFY_BUFSIZE]; |
517 | int i; |
3122 | int ofs; |
|
|
3123 | int len = read (fs_fd, buf, sizeof (buf)); |
518 | |
3124 | |
519 | ev_now = ev_time (); |
3125 | for (ofs = 0; ofs < len; ) |
520 | |
3126 | { |
521 | if (have_monotonic) |
3127 | struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
|
|
3128 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
|
|
3129 | ofs += sizeof (struct inotify_event) + ev->len; |
522 | { |
3130 | } |
523 | ev_tstamp odiff = diff; |
3131 | } |
524 | |
3132 | |
525 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
3133 | inline_size void |
|
|
3134 | ev_check_2625 (EV_P) |
|
|
3135 | { |
|
|
3136 | /* kernels < 2.6.25 are borked |
|
|
3137 | * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
|
|
3138 | */ |
|
|
3139 | if (ev_linux_version () < 0x020619) |
|
|
3140 | return; |
|
|
3141 | |
|
|
3142 | fs_2625 = 1; |
|
|
3143 | } |
|
|
3144 | |
|
|
3145 | inline_size int |
|
|
3146 | infy_newfd (void) |
|
|
3147 | { |
|
|
3148 | #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) |
|
|
3149 | int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
|
|
3150 | if (fd >= 0) |
|
|
3151 | return fd; |
|
|
3152 | #endif |
|
|
3153 | return inotify_init (); |
|
|
3154 | } |
|
|
3155 | |
|
|
3156 | inline_size void |
|
|
3157 | infy_init (EV_P) |
|
|
3158 | { |
|
|
3159 | if (fs_fd != -2) |
|
|
3160 | return; |
|
|
3161 | |
|
|
3162 | fs_fd = -1; |
|
|
3163 | |
|
|
3164 | ev_check_2625 (EV_A); |
|
|
3165 | |
|
|
3166 | fs_fd = infy_newfd (); |
|
|
3167 | |
|
|
3168 | if (fs_fd >= 0) |
|
|
3169 | { |
|
|
3170 | fd_intern (fs_fd); |
|
|
3171 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
|
|
3172 | ev_set_priority (&fs_w, EV_MAXPRI); |
|
|
3173 | ev_io_start (EV_A_ &fs_w); |
|
|
3174 | ev_unref (EV_A); |
|
|
3175 | } |
|
|
3176 | } |
|
|
3177 | |
|
|
3178 | inline_size void |
|
|
3179 | infy_fork (EV_P) |
|
|
3180 | { |
|
|
3181 | int slot; |
|
|
3182 | |
|
|
3183 | if (fs_fd < 0) |
|
|
3184 | return; |
|
|
3185 | |
|
|
3186 | ev_ref (EV_A); |
|
|
3187 | ev_io_stop (EV_A_ &fs_w); |
|
|
3188 | close (fs_fd); |
|
|
3189 | fs_fd = infy_newfd (); |
|
|
3190 | |
|
|
3191 | if (fs_fd >= 0) |
|
|
3192 | { |
|
|
3193 | fd_intern (fs_fd); |
|
|
3194 | ev_io_set (&fs_w, fs_fd, EV_READ); |
|
|
3195 | ev_io_start (EV_A_ &fs_w); |
|
|
3196 | ev_unref (EV_A); |
|
|
3197 | } |
|
|
3198 | |
|
|
3199 | for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
|
|
3200 | { |
|
|
3201 | WL w_ = fs_hash [slot].head; |
|
|
3202 | fs_hash [slot].head = 0; |
|
|
3203 | |
|
|
3204 | while (w_) |
526 | { |
3205 | { |
527 | now = get_clock (); |
3206 | ev_stat *w = (ev_stat *)w_; |
528 | diff = ev_now - now; |
3207 | w_ = w_->next; /* lets us add this watcher */ |
529 | |
3208 | |
530 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
3209 | w->wd = -1; |
531 | return; /* all is well */ |
|
|
532 | |
3210 | |
533 | ev_now = ev_time (); |
3211 | if (fs_fd >= 0) |
|
|
3212 | infy_add (EV_A_ w); /* re-add, no matter what */ |
|
|
3213 | else |
|
|
3214 | { |
|
|
3215 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3216 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
|
|
3217 | ev_timer_again (EV_A_ &w->timer); |
|
|
3218 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
3219 | } |
534 | } |
3220 | } |
535 | |
|
|
536 | periodics_reschedule (diff - odiff); |
|
|
537 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
538 | } |
3221 | } |
|
|
3222 | } |
|
|
3223 | |
|
|
3224 | #endif |
|
|
3225 | |
|
|
3226 | #ifdef _WIN32 |
|
|
3227 | # define EV_LSTAT(p,b) _stati64 (p, b) |
|
|
3228 | #else |
|
|
3229 | # define EV_LSTAT(p,b) lstat (p, b) |
|
|
3230 | #endif |
|
|
3231 | |
|
|
3232 | void |
|
|
3233 | ev_stat_stat (EV_P_ ev_stat *w) |
|
|
3234 | { |
|
|
3235 | if (lstat (w->path, &w->attr) < 0) |
|
|
3236 | w->attr.st_nlink = 0; |
|
|
3237 | else if (!w->attr.st_nlink) |
|
|
3238 | w->attr.st_nlink = 1; |
|
|
3239 | } |
|
|
3240 | |
|
|
3241 | static void noinline |
|
|
3242 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
|
|
3243 | { |
|
|
3244 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
|
|
3245 | |
|
|
3246 | ev_statdata prev = w->attr; |
|
|
3247 | ev_stat_stat (EV_A_ w); |
|
|
3248 | |
|
|
3249 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
|
|
3250 | if ( |
|
|
3251 | prev.st_dev != w->attr.st_dev |
|
|
3252 | || prev.st_ino != w->attr.st_ino |
|
|
3253 | || prev.st_mode != w->attr.st_mode |
|
|
3254 | || prev.st_nlink != w->attr.st_nlink |
|
|
3255 | || prev.st_uid != w->attr.st_uid |
|
|
3256 | || prev.st_gid != w->attr.st_gid |
|
|
3257 | || prev.st_rdev != w->attr.st_rdev |
|
|
3258 | || prev.st_size != w->attr.st_size |
|
|
3259 | || prev.st_atime != w->attr.st_atime |
|
|
3260 | || prev.st_mtime != w->attr.st_mtime |
|
|
3261 | || prev.st_ctime != w->attr.st_ctime |
|
|
3262 | ) { |
|
|
3263 | /* we only update w->prev on actual differences */ |
|
|
3264 | /* in case we test more often than invoke the callback, */ |
|
|
3265 | /* to ensure that prev is always different to attr */ |
|
|
3266 | w->prev = prev; |
|
|
3267 | |
|
|
3268 | #if EV_USE_INOTIFY |
|
|
3269 | if (fs_fd >= 0) |
|
|
3270 | { |
|
|
3271 | infy_del (EV_A_ w); |
|
|
3272 | infy_add (EV_A_ w); |
|
|
3273 | ev_stat_stat (EV_A_ w); /* avoid race... */ |
|
|
3274 | } |
|
|
3275 | #endif |
|
|
3276 | |
|
|
3277 | ev_feed_event (EV_A_ w, EV_STAT); |
|
|
3278 | } |
|
|
3279 | } |
|
|
3280 | |
|
|
3281 | void |
|
|
3282 | ev_stat_start (EV_P_ ev_stat *w) |
|
|
3283 | { |
|
|
3284 | if (expect_false (ev_is_active (w))) |
|
|
3285 | return; |
|
|
3286 | |
|
|
3287 | ev_stat_stat (EV_A_ w); |
|
|
3288 | |
|
|
3289 | if (w->interval < MIN_STAT_INTERVAL && w->interval) |
|
|
3290 | w->interval = MIN_STAT_INTERVAL; |
|
|
3291 | |
|
|
3292 | ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); |
|
|
3293 | ev_set_priority (&w->timer, ev_priority (w)); |
|
|
3294 | |
|
|
3295 | #if EV_USE_INOTIFY |
|
|
3296 | infy_init (EV_A); |
|
|
3297 | |
|
|
3298 | if (fs_fd >= 0) |
|
|
3299 | infy_add (EV_A_ w); |
539 | else |
3300 | else |
|
|
3301 | #endif |
|
|
3302 | { |
|
|
3303 | ev_timer_again (EV_A_ &w->timer); |
|
|
3304 | ev_unref (EV_A); |
540 | { |
3305 | } |
541 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
3306 | |
|
|
3307 | ev_start (EV_A_ (W)w, 1); |
|
|
3308 | |
|
|
3309 | EV_FREQUENT_CHECK; |
|
|
3310 | } |
|
|
3311 | |
|
|
3312 | void |
|
|
3313 | ev_stat_stop (EV_P_ ev_stat *w) |
|
|
3314 | { |
|
|
3315 | clear_pending (EV_A_ (W)w); |
|
|
3316 | if (expect_false (!ev_is_active (w))) |
|
|
3317 | return; |
|
|
3318 | |
|
|
3319 | EV_FREQUENT_CHECK; |
|
|
3320 | |
|
|
3321 | #if EV_USE_INOTIFY |
|
|
3322 | infy_del (EV_A_ w); |
|
|
3323 | #endif |
|
|
3324 | |
|
|
3325 | if (ev_is_active (&w->timer)) |
|
|
3326 | { |
|
|
3327 | ev_ref (EV_A); |
|
|
3328 | ev_timer_stop (EV_A_ &w->timer); |
|
|
3329 | } |
|
|
3330 | |
|
|
3331 | ev_stop (EV_A_ (W)w); |
|
|
3332 | |
|
|
3333 | EV_FREQUENT_CHECK; |
|
|
3334 | } |
|
|
3335 | #endif |
|
|
3336 | |
|
|
3337 | #if EV_IDLE_ENABLE |
|
|
3338 | void |
|
|
3339 | ev_idle_start (EV_P_ ev_idle *w) |
|
|
3340 | { |
|
|
3341 | if (expect_false (ev_is_active (w))) |
|
|
3342 | return; |
|
|
3343 | |
|
|
3344 | pri_adjust (EV_A_ (W)w); |
|
|
3345 | |
|
|
3346 | EV_FREQUENT_CHECK; |
|
|
3347 | |
|
|
3348 | { |
|
|
3349 | int active = ++idlecnt [ABSPRI (w)]; |
|
|
3350 | |
|
|
3351 | ++idleall; |
|
|
3352 | ev_start (EV_A_ (W)w, active); |
|
|
3353 | |
|
|
3354 | array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
|
|
3355 | idles [ABSPRI (w)][active - 1] = w; |
|
|
3356 | } |
|
|
3357 | |
|
|
3358 | EV_FREQUENT_CHECK; |
|
|
3359 | } |
|
|
3360 | |
|
|
3361 | void |
|
|
3362 | ev_idle_stop (EV_P_ ev_idle *w) |
|
|
3363 | { |
|
|
3364 | clear_pending (EV_A_ (W)w); |
|
|
3365 | if (expect_false (!ev_is_active (w))) |
|
|
3366 | return; |
|
|
3367 | |
|
|
3368 | EV_FREQUENT_CHECK; |
|
|
3369 | |
|
|
3370 | { |
|
|
3371 | int active = ev_active (w); |
|
|
3372 | |
|
|
3373 | idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
|
|
3374 | ev_active (idles [ABSPRI (w)][active - 1]) = active; |
|
|
3375 | |
|
|
3376 | ev_stop (EV_A_ (W)w); |
|
|
3377 | --idleall; |
|
|
3378 | } |
|
|
3379 | |
|
|
3380 | EV_FREQUENT_CHECK; |
|
|
3381 | } |
|
|
3382 | #endif |
|
|
3383 | |
|
|
3384 | #if EV_PREPARE_ENABLE |
|
|
3385 | void |
|
|
3386 | ev_prepare_start (EV_P_ ev_prepare *w) |
|
|
3387 | { |
|
|
3388 | if (expect_false (ev_is_active (w))) |
|
|
3389 | return; |
|
|
3390 | |
|
|
3391 | EV_FREQUENT_CHECK; |
|
|
3392 | |
|
|
3393 | ev_start (EV_A_ (W)w, ++preparecnt); |
|
|
3394 | array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
|
|
3395 | prepares [preparecnt - 1] = w; |
|
|
3396 | |
|
|
3397 | EV_FREQUENT_CHECK; |
|
|
3398 | } |
|
|
3399 | |
|
|
3400 | void |
|
|
3401 | ev_prepare_stop (EV_P_ ev_prepare *w) |
|
|
3402 | { |
|
|
3403 | clear_pending (EV_A_ (W)w); |
|
|
3404 | if (expect_false (!ev_is_active (w))) |
|
|
3405 | return; |
|
|
3406 | |
|
|
3407 | EV_FREQUENT_CHECK; |
|
|
3408 | |
|
|
3409 | { |
|
|
3410 | int active = ev_active (w); |
|
|
3411 | |
|
|
3412 | prepares [active - 1] = prepares [--preparecnt]; |
|
|
3413 | ev_active (prepares [active - 1]) = active; |
|
|
3414 | } |
|
|
3415 | |
|
|
3416 | ev_stop (EV_A_ (W)w); |
|
|
3417 | |
|
|
3418 | EV_FREQUENT_CHECK; |
|
|
3419 | } |
|
|
3420 | #endif |
|
|
3421 | |
|
|
3422 | #if EV_CHECK_ENABLE |
|
|
3423 | void |
|
|
3424 | ev_check_start (EV_P_ ev_check *w) |
|
|
3425 | { |
|
|
3426 | if (expect_false (ev_is_active (w))) |
|
|
3427 | return; |
|
|
3428 | |
|
|
3429 | EV_FREQUENT_CHECK; |
|
|
3430 | |
|
|
3431 | ev_start (EV_A_ (W)w, ++checkcnt); |
|
|
3432 | array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
|
|
3433 | checks [checkcnt - 1] = w; |
|
|
3434 | |
|
|
3435 | EV_FREQUENT_CHECK; |
|
|
3436 | } |
|
|
3437 | |
|
|
3438 | void |
|
|
3439 | ev_check_stop (EV_P_ ev_check *w) |
|
|
3440 | { |
|
|
3441 | clear_pending (EV_A_ (W)w); |
|
|
3442 | if (expect_false (!ev_is_active (w))) |
|
|
3443 | return; |
|
|
3444 | |
|
|
3445 | EV_FREQUENT_CHECK; |
|
|
3446 | |
|
|
3447 | { |
|
|
3448 | int active = ev_active (w); |
|
|
3449 | |
|
|
3450 | checks [active - 1] = checks [--checkcnt]; |
|
|
3451 | ev_active (checks [active - 1]) = active; |
|
|
3452 | } |
|
|
3453 | |
|
|
3454 | ev_stop (EV_A_ (W)w); |
|
|
3455 | |
|
|
3456 | EV_FREQUENT_CHECK; |
|
|
3457 | } |
|
|
3458 | #endif |
|
|
3459 | |
|
|
3460 | #if EV_EMBED_ENABLE |
|
|
3461 | void noinline |
|
|
3462 | ev_embed_sweep (EV_P_ ev_embed *w) |
|
|
3463 | { |
|
|
3464 | ev_run (w->other, EVRUN_NOWAIT); |
|
|
3465 | } |
|
|
3466 | |
|
|
3467 | static void |
|
|
3468 | embed_io_cb (EV_P_ ev_io *io, int revents) |
|
|
3469 | { |
|
|
3470 | ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
|
|
3471 | |
|
|
3472 | if (ev_cb (w)) |
|
|
3473 | ev_feed_event (EV_A_ (W)w, EV_EMBED); |
|
|
3474 | else |
|
|
3475 | ev_run (w->other, EVRUN_NOWAIT); |
|
|
3476 | } |
|
|
3477 | |
|
|
3478 | static void |
|
|
3479 | embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
|
|
3480 | { |
|
|
3481 | ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
|
|
3482 | |
|
|
3483 | { |
|
|
3484 | EV_P = w->other; |
|
|
3485 | |
|
|
3486 | while (fdchangecnt) |
542 | { |
3487 | { |
543 | periodics_reschedule (ev_now - now); |
3488 | fd_reify (EV_A); |
544 | |
3489 | ev_run (EV_A_ EVRUN_NOWAIT); |
545 | /* adjust timers. this is easy, as the offset is the same for all */ |
|
|
546 | for (i = 0; i < timercnt; ++i) |
|
|
547 | timers [i]->at += diff; |
|
|
548 | } |
3490 | } |
549 | |
|
|
550 | now = ev_now; |
|
|
551 | } |
3491 | } |
552 | } |
3492 | } |
553 | |
3493 | |
554 | int ev_loop_done; |
3494 | static void |
555 | |
3495 | embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) |
556 | void ev_loop (int flags) |
|
|
557 | { |
3496 | { |
558 | double block; |
3497 | ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); |
559 | ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; |
|
|
560 | |
3498 | |
561 | do |
3499 | ev_embed_stop (EV_A_ w); |
|
|
3500 | |
562 | { |
3501 | { |
563 | /* queue check watchers (and execute them) */ |
3502 | EV_P = w->other; |
564 | if (preparecnt) |
|
|
565 | { |
|
|
566 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
|
|
567 | call_pending (); |
|
|
568 | } |
|
|
569 | |
3503 | |
570 | /* update fd-related kernel structures */ |
3504 | ev_loop_fork (EV_A); |
571 | fd_reify (); |
3505 | ev_run (EV_A_ EVRUN_NOWAIT); |
572 | |
|
|
573 | /* calculate blocking time */ |
|
|
574 | |
|
|
575 | /* we only need this for !monotonic clockor timers, but as we basically |
|
|
576 | always have timers, we just calculate it always */ |
|
|
577 | ev_now = ev_time (); |
|
|
578 | |
|
|
579 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
|
|
580 | block = 0.; |
|
|
581 | else |
|
|
582 | { |
|
|
583 | block = MAX_BLOCKTIME; |
|
|
584 | |
|
|
585 | if (timercnt) |
|
|
586 | { |
|
|
587 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
|
|
588 | if (block > to) block = to; |
|
|
589 | } |
|
|
590 | |
|
|
591 | if (periodiccnt) |
|
|
592 | { |
|
|
593 | ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
|
|
594 | if (block > to) block = to; |
|
|
595 | } |
|
|
596 | |
|
|
597 | if (block < 0.) block = 0.; |
|
|
598 | } |
|
|
599 | |
|
|
600 | method_poll (block); |
|
|
601 | |
|
|
602 | /* update ev_now, do magic */ |
|
|
603 | time_update (); |
|
|
604 | |
|
|
605 | /* queue pending timers and reschedule them */ |
|
|
606 | timers_reify (); /* relative timers called last */ |
|
|
607 | periodics_reify (); /* absolute timers called first */ |
|
|
608 | |
|
|
609 | /* queue idle watchers unless io or timers are pending */ |
|
|
610 | if (!pendingcnt) |
|
|
611 | queue_events ((W *)idles, idlecnt, EV_IDLE); |
|
|
612 | |
|
|
613 | /* queue check watchers, to be executed first */ |
|
|
614 | if (checkcnt) |
|
|
615 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
|
|
616 | |
|
|
617 | call_pending (); |
|
|
618 | } |
3506 | } |
619 | while (!ev_loop_done); |
|
|
620 | |
3507 | |
621 | if (ev_loop_done != 2) |
3508 | ev_embed_start (EV_A_ w); |
622 | ev_loop_done = 0; |
|
|
623 | } |
3509 | } |
|
|
3510 | |
|
|
3511 | #if 0 |
|
|
3512 | static void |
|
|
3513 | embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
|
|
3514 | { |
|
|
3515 | ev_idle_stop (EV_A_ idle); |
|
|
3516 | } |
|
|
3517 | #endif |
|
|
3518 | |
|
|
3519 | void |
|
|
3520 | ev_embed_start (EV_P_ ev_embed *w) |
|
|
3521 | { |
|
|
3522 | if (expect_false (ev_is_active (w))) |
|
|
3523 | return; |
|
|
3524 | |
|
|
3525 | { |
|
|
3526 | EV_P = w->other; |
|
|
3527 | assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
|
|
3528 | ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
|
|
3529 | } |
|
|
3530 | |
|
|
3531 | EV_FREQUENT_CHECK; |
|
|
3532 | |
|
|
3533 | ev_set_priority (&w->io, ev_priority (w)); |
|
|
3534 | ev_io_start (EV_A_ &w->io); |
|
|
3535 | |
|
|
3536 | ev_prepare_init (&w->prepare, embed_prepare_cb); |
|
|
3537 | ev_set_priority (&w->prepare, EV_MINPRI); |
|
|
3538 | ev_prepare_start (EV_A_ &w->prepare); |
|
|
3539 | |
|
|
3540 | ev_fork_init (&w->fork, embed_fork_cb); |
|
|
3541 | ev_fork_start (EV_A_ &w->fork); |
|
|
3542 | |
|
|
3543 | /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
|
|
3544 | |
|
|
3545 | ev_start (EV_A_ (W)w, 1); |
|
|
3546 | |
|
|
3547 | EV_FREQUENT_CHECK; |
|
|
3548 | } |
|
|
3549 | |
|
|
3550 | void |
|
|
3551 | ev_embed_stop (EV_P_ ev_embed *w) |
|
|
3552 | { |
|
|
3553 | clear_pending (EV_A_ (W)w); |
|
|
3554 | if (expect_false (!ev_is_active (w))) |
|
|
3555 | return; |
|
|
3556 | |
|
|
3557 | EV_FREQUENT_CHECK; |
|
|
3558 | |
|
|
3559 | ev_io_stop (EV_A_ &w->io); |
|
|
3560 | ev_prepare_stop (EV_A_ &w->prepare); |
|
|
3561 | ev_fork_stop (EV_A_ &w->fork); |
|
|
3562 | |
|
|
3563 | ev_stop (EV_A_ (W)w); |
|
|
3564 | |
|
|
3565 | EV_FREQUENT_CHECK; |
|
|
3566 | } |
|
|
3567 | #endif |
|
|
3568 | |
|
|
3569 | #if EV_FORK_ENABLE |
|
|
3570 | void |
|
|
3571 | ev_fork_start (EV_P_ ev_fork *w) |
|
|
3572 | { |
|
|
3573 | if (expect_false (ev_is_active (w))) |
|
|
3574 | return; |
|
|
3575 | |
|
|
3576 | EV_FREQUENT_CHECK; |
|
|
3577 | |
|
|
3578 | ev_start (EV_A_ (W)w, ++forkcnt); |
|
|
3579 | array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
|
|
3580 | forks [forkcnt - 1] = w; |
|
|
3581 | |
|
|
3582 | EV_FREQUENT_CHECK; |
|
|
3583 | } |
|
|
3584 | |
|
|
3585 | void |
|
|
3586 | ev_fork_stop (EV_P_ ev_fork *w) |
|
|
3587 | { |
|
|
3588 | clear_pending (EV_A_ (W)w); |
|
|
3589 | if (expect_false (!ev_is_active (w))) |
|
|
3590 | return; |
|
|
3591 | |
|
|
3592 | EV_FREQUENT_CHECK; |
|
|
3593 | |
|
|
3594 | { |
|
|
3595 | int active = ev_active (w); |
|
|
3596 | |
|
|
3597 | forks [active - 1] = forks [--forkcnt]; |
|
|
3598 | ev_active (forks [active - 1]) = active; |
|
|
3599 | } |
|
|
3600 | |
|
|
3601 | ev_stop (EV_A_ (W)w); |
|
|
3602 | |
|
|
3603 | EV_FREQUENT_CHECK; |
|
|
3604 | } |
|
|
3605 | #endif |
|
|
3606 | |
|
|
3607 | #if EV_CLEANUP_ENABLE |
|
|
3608 | void |
|
|
3609 | ev_cleanup_start (EV_P_ ev_cleanup *w) |
|
|
3610 | { |
|
|
3611 | if (expect_false (ev_is_active (w))) |
|
|
3612 | return; |
|
|
3613 | |
|
|
3614 | EV_FREQUENT_CHECK; |
|
|
3615 | |
|
|
3616 | ev_start (EV_A_ (W)w, ++cleanupcnt); |
|
|
3617 | array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
|
|
3618 | cleanups [cleanupcnt - 1] = w; |
|
|
3619 | |
|
|
3620 | /* cleanup watchers should never keep a refcount on the loop */ |
|
|
3621 | ev_unref (EV_A); |
|
|
3622 | EV_FREQUENT_CHECK; |
|
|
3623 | } |
|
|
3624 | |
|
|
3625 | void |
|
|
3626 | ev_cleanup_stop (EV_P_ ev_cleanup *w) |
|
|
3627 | { |
|
|
3628 | clear_pending (EV_A_ (W)w); |
|
|
3629 | if (expect_false (!ev_is_active (w))) |
|
|
3630 | return; |
|
|
3631 | |
|
|
3632 | EV_FREQUENT_CHECK; |
|
|
3633 | ev_ref (EV_A); |
|
|
3634 | |
|
|
3635 | { |
|
|
3636 | int active = ev_active (w); |
|
|
3637 | |
|
|
3638 | cleanups [active - 1] = cleanups [--cleanupcnt]; |
|
|
3639 | ev_active (cleanups [active - 1]) = active; |
|
|
3640 | } |
|
|
3641 | |
|
|
3642 | ev_stop (EV_A_ (W)w); |
|
|
3643 | |
|
|
3644 | EV_FREQUENT_CHECK; |
|
|
3645 | } |
|
|
3646 | #endif |
|
|
3647 | |
|
|
3648 | #if EV_ASYNC_ENABLE |
|
|
3649 | void |
|
|
3650 | ev_async_start (EV_P_ ev_async *w) |
|
|
3651 | { |
|
|
3652 | if (expect_false (ev_is_active (w))) |
|
|
3653 | return; |
|
|
3654 | |
|
|
3655 | w->sent = 0; |
|
|
3656 | |
|
|
3657 | evpipe_init (EV_A); |
|
|
3658 | |
|
|
3659 | EV_FREQUENT_CHECK; |
|
|
3660 | |
|
|
3661 | ev_start (EV_A_ (W)w, ++asynccnt); |
|
|
3662 | array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
|
|
3663 | asyncs [asynccnt - 1] = w; |
|
|
3664 | |
|
|
3665 | EV_FREQUENT_CHECK; |
|
|
3666 | } |
|
|
3667 | |
|
|
3668 | void |
|
|
3669 | ev_async_stop (EV_P_ ev_async *w) |
|
|
3670 | { |
|
|
3671 | clear_pending (EV_A_ (W)w); |
|
|
3672 | if (expect_false (!ev_is_active (w))) |
|
|
3673 | return; |
|
|
3674 | |
|
|
3675 | EV_FREQUENT_CHECK; |
|
|
3676 | |
|
|
3677 | { |
|
|
3678 | int active = ev_active (w); |
|
|
3679 | |
|
|
3680 | asyncs [active - 1] = asyncs [--asynccnt]; |
|
|
3681 | ev_active (asyncs [active - 1]) = active; |
|
|
3682 | } |
|
|
3683 | |
|
|
3684 | ev_stop (EV_A_ (W)w); |
|
|
3685 | |
|
|
3686 | EV_FREQUENT_CHECK; |
|
|
3687 | } |
|
|
3688 | |
|
|
3689 | void |
|
|
3690 | ev_async_send (EV_P_ ev_async *w) |
|
|
3691 | { |
|
|
3692 | w->sent = 1; |
|
|
3693 | evpipe_write (EV_A_ &async_pending); |
|
|
3694 | } |
|
|
3695 | #endif |
624 | |
3696 | |
625 | /*****************************************************************************/ |
3697 | /*****************************************************************************/ |
626 | |
3698 | |
627 | static void |
|
|
628 | wlist_add (WL *head, WL elem) |
|
|
629 | { |
|
|
630 | elem->next = *head; |
|
|
631 | *head = elem; |
|
|
632 | } |
|
|
633 | |
|
|
634 | static void |
|
|
635 | wlist_del (WL *head, WL elem) |
|
|
636 | { |
|
|
637 | while (*head) |
|
|
638 | { |
|
|
639 | if (*head == elem) |
|
|
640 | { |
|
|
641 | *head = elem->next; |
|
|
642 | return; |
|
|
643 | } |
|
|
644 | |
|
|
645 | head = &(*head)->next; |
|
|
646 | } |
|
|
647 | } |
|
|
648 | |
|
|
649 | static void |
|
|
650 | ev_clear (W w) |
|
|
651 | { |
|
|
652 | if (w->pending) |
|
|
653 | { |
|
|
654 | pendings [w->pending - 1].w = 0; |
|
|
655 | w->pending = 0; |
|
|
656 | } |
|
|
657 | } |
|
|
658 | |
|
|
659 | static void |
|
|
660 | ev_start (W w, int active) |
|
|
661 | { |
|
|
662 | w->active = active; |
|
|
663 | } |
|
|
664 | |
|
|
665 | static void |
|
|
666 | ev_stop (W w) |
|
|
667 | { |
|
|
668 | w->active = 0; |
|
|
669 | } |
|
|
670 | |
|
|
671 | /*****************************************************************************/ |
|
|
672 | |
|
|
673 | void |
|
|
674 | evio_start (struct ev_io *w) |
|
|
675 | { |
|
|
676 | if (ev_is_active (w)) |
|
|
677 | return; |
|
|
678 | |
|
|
679 | int fd = w->fd; |
|
|
680 | |
|
|
681 | ev_start ((W)w, 1); |
|
|
682 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
|
|
683 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
|
|
684 | |
|
|
685 | ++fdchangecnt; |
|
|
686 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
687 | fdchanges [fdchangecnt - 1] = fd; |
|
|
688 | } |
|
|
689 | |
|
|
690 | void |
|
|
691 | evio_stop (struct ev_io *w) |
|
|
692 | { |
|
|
693 | ev_clear ((W)w); |
|
|
694 | if (!ev_is_active (w)) |
|
|
695 | return; |
|
|
696 | |
|
|
697 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
|
|
698 | ev_stop ((W)w); |
|
|
699 | |
|
|
700 | ++fdchangecnt; |
|
|
701 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
702 | fdchanges [fdchangecnt - 1] = w->fd; |
|
|
703 | } |
|
|
704 | |
|
|
705 | void |
|
|
706 | evtimer_start (struct ev_timer *w) |
|
|
707 | { |
|
|
708 | if (ev_is_active (w)) |
|
|
709 | return; |
|
|
710 | |
|
|
711 | w->at += now; |
|
|
712 | |
|
|
713 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
|
|
714 | |
|
|
715 | ev_start ((W)w, ++timercnt); |
|
|
716 | array_needsize (timers, timermax, timercnt, ); |
|
|
717 | timers [timercnt - 1] = w; |
|
|
718 | upheap ((WT *)timers, timercnt - 1); |
|
|
719 | } |
|
|
720 | |
|
|
721 | void |
|
|
722 | evtimer_stop (struct ev_timer *w) |
|
|
723 | { |
|
|
724 | ev_clear ((W)w); |
|
|
725 | if (!ev_is_active (w)) |
|
|
726 | return; |
|
|
727 | |
|
|
728 | if (w->active < timercnt--) |
|
|
729 | { |
|
|
730 | timers [w->active - 1] = timers [timercnt]; |
|
|
731 | downheap ((WT *)timers, timercnt, w->active - 1); |
|
|
732 | } |
|
|
733 | |
|
|
734 | w->at = w->repeat; |
|
|
735 | |
|
|
736 | ev_stop ((W)w); |
|
|
737 | } |
|
|
738 | |
|
|
739 | void |
|
|
740 | evtimer_again (struct ev_timer *w) |
|
|
741 | { |
|
|
742 | if (ev_is_active (w)) |
|
|
743 | { |
|
|
744 | if (w->repeat) |
|
|
745 | { |
|
|
746 | w->at = now + w->repeat; |
|
|
747 | downheap ((WT *)timers, timercnt, w->active - 1); |
|
|
748 | } |
|
|
749 | else |
|
|
750 | evtimer_stop (w); |
|
|
751 | } |
|
|
752 | else if (w->repeat) |
|
|
753 | evtimer_start (w); |
|
|
754 | } |
|
|
755 | |
|
|
756 | void |
|
|
757 | evperiodic_start (struct ev_periodic *w) |
|
|
758 | { |
|
|
759 | if (ev_is_active (w)) |
|
|
760 | return; |
|
|
761 | |
|
|
762 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
|
|
763 | |
|
|
764 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
765 | if (w->interval) |
|
|
766 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
|
|
767 | |
|
|
768 | ev_start ((W)w, ++periodiccnt); |
|
|
769 | array_needsize (periodics, periodicmax, periodiccnt, ); |
|
|
770 | periodics [periodiccnt - 1] = w; |
|
|
771 | upheap ((WT *)periodics, periodiccnt - 1); |
|
|
772 | } |
|
|
773 | |
|
|
774 | void |
|
|
775 | evperiodic_stop (struct ev_periodic *w) |
|
|
776 | { |
|
|
777 | ev_clear ((W)w); |
|
|
778 | if (!ev_is_active (w)) |
|
|
779 | return; |
|
|
780 | |
|
|
781 | if (w->active < periodiccnt--) |
|
|
782 | { |
|
|
783 | periodics [w->active - 1] = periodics [periodiccnt]; |
|
|
784 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
|
|
785 | } |
|
|
786 | |
|
|
787 | ev_stop ((W)w); |
|
|
788 | } |
|
|
789 | |
|
|
790 | void |
|
|
791 | evsignal_start (struct ev_signal *w) |
|
|
792 | { |
|
|
793 | if (ev_is_active (w)) |
|
|
794 | return; |
|
|
795 | |
|
|
796 | ev_start ((W)w, 1); |
|
|
797 | array_needsize (signals, signalmax, w->signum, signals_init); |
|
|
798 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
|
|
799 | |
|
|
800 | if (!w->next) |
|
|
801 | { |
|
|
802 | struct sigaction sa; |
|
|
803 | sa.sa_handler = sighandler; |
|
|
804 | sigfillset (&sa.sa_mask); |
|
|
805 | sa.sa_flags = 0; |
|
|
806 | sigaction (w->signum, &sa, 0); |
|
|
807 | } |
|
|
808 | } |
|
|
809 | |
|
|
810 | void |
|
|
811 | evsignal_stop (struct ev_signal *w) |
|
|
812 | { |
|
|
813 | ev_clear ((W)w); |
|
|
814 | if (!ev_is_active (w)) |
|
|
815 | return; |
|
|
816 | |
|
|
817 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
|
|
818 | ev_stop ((W)w); |
|
|
819 | |
|
|
820 | if (!signals [w->signum - 1].head) |
|
|
821 | signal (w->signum, SIG_DFL); |
|
|
822 | } |
|
|
823 | |
|
|
824 | void evidle_start (struct ev_idle *w) |
|
|
825 | { |
|
|
826 | if (ev_is_active (w)) |
|
|
827 | return; |
|
|
828 | |
|
|
829 | ev_start ((W)w, ++idlecnt); |
|
|
830 | array_needsize (idles, idlemax, idlecnt, ); |
|
|
831 | idles [idlecnt - 1] = w; |
|
|
832 | } |
|
|
833 | |
|
|
834 | void evidle_stop (struct ev_idle *w) |
|
|
835 | { |
|
|
836 | ev_clear ((W)w); |
|
|
837 | if (ev_is_active (w)) |
|
|
838 | return; |
|
|
839 | |
|
|
840 | idles [w->active - 1] = idles [--idlecnt]; |
|
|
841 | ev_stop ((W)w); |
|
|
842 | } |
|
|
843 | |
|
|
844 | void evprepare_start (struct ev_prepare *w) |
|
|
845 | { |
|
|
846 | if (ev_is_active (w)) |
|
|
847 | return; |
|
|
848 | |
|
|
849 | ev_start ((W)w, ++preparecnt); |
|
|
850 | array_needsize (prepares, preparemax, preparecnt, ); |
|
|
851 | prepares [preparecnt - 1] = w; |
|
|
852 | } |
|
|
853 | |
|
|
854 | void evprepare_stop (struct ev_prepare *w) |
|
|
855 | { |
|
|
856 | ev_clear ((W)w); |
|
|
857 | if (ev_is_active (w)) |
|
|
858 | return; |
|
|
859 | |
|
|
860 | prepares [w->active - 1] = prepares [--preparecnt]; |
|
|
861 | ev_stop ((W)w); |
|
|
862 | } |
|
|
863 | |
|
|
864 | void evcheck_start (struct ev_check *w) |
|
|
865 | { |
|
|
866 | if (ev_is_active (w)) |
|
|
867 | return; |
|
|
868 | |
|
|
869 | ev_start ((W)w, ++checkcnt); |
|
|
870 | array_needsize (checks, checkmax, checkcnt, ); |
|
|
871 | checks [checkcnt - 1] = w; |
|
|
872 | } |
|
|
873 | |
|
|
874 | void evcheck_stop (struct ev_check *w) |
|
|
875 | { |
|
|
876 | ev_clear ((W)w); |
|
|
877 | if (ev_is_active (w)) |
|
|
878 | return; |
|
|
879 | |
|
|
880 | checks [w->active - 1] = checks [--checkcnt]; |
|
|
881 | ev_stop ((W)w); |
|
|
882 | } |
|
|
883 | |
|
|
884 | /*****************************************************************************/ |
|
|
885 | |
|
|
886 | struct ev_once |
3699 | struct ev_once |
887 | { |
3700 | { |
888 | struct ev_io io; |
3701 | ev_io io; |
889 | struct ev_timer to; |
3702 | ev_timer to; |
890 | void (*cb)(int revents, void *arg); |
3703 | void (*cb)(int revents, void *arg); |
891 | void *arg; |
3704 | void *arg; |
892 | }; |
3705 | }; |
893 | |
3706 | |
894 | static void |
3707 | static void |
895 | once_cb (struct ev_once *once, int revents) |
3708 | once_cb (EV_P_ struct ev_once *once, int revents) |
896 | { |
3709 | { |
897 | void (*cb)(int revents, void *arg) = once->cb; |
3710 | void (*cb)(int revents, void *arg) = once->cb; |
898 | void *arg = once->arg; |
3711 | void *arg = once->arg; |
899 | |
3712 | |
900 | evio_stop (&once->io); |
3713 | ev_io_stop (EV_A_ &once->io); |
901 | evtimer_stop (&once->to); |
3714 | ev_timer_stop (EV_A_ &once->to); |
902 | free (once); |
3715 | ev_free (once); |
903 | |
3716 | |
904 | cb (revents, arg); |
3717 | cb (revents, arg); |
905 | } |
3718 | } |
906 | |
3719 | |
907 | static void |
3720 | static void |
908 | once_cb_io (struct ev_io *w, int revents) |
3721 | once_cb_io (EV_P_ ev_io *w, int revents) |
909 | { |
3722 | { |
910 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
3723 | struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); |
|
|
3724 | |
|
|
3725 | once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); |
911 | } |
3726 | } |
912 | |
3727 | |
913 | static void |
3728 | static void |
914 | once_cb_to (struct ev_timer *w, int revents) |
3729 | once_cb_to (EV_P_ ev_timer *w, int revents) |
915 | { |
3730 | { |
916 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
3731 | struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); |
917 | } |
|
|
918 | |
3732 | |
|
|
3733 | once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); |
|
|
3734 | } |
|
|
3735 | |
919 | void |
3736 | void |
920 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
3737 | ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
921 | { |
3738 | { |
922 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
3739 | struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
923 | |
3740 | |
924 | if (!once) |
3741 | if (expect_false (!once)) |
925 | cb (EV_ERROR, arg); |
3742 | { |
926 | else |
3743 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg); |
|
|
3744 | return; |
927 | { |
3745 | } |
|
|
3746 | |
928 | once->cb = cb; |
3747 | once->cb = cb; |
929 | once->arg = arg; |
3748 | once->arg = arg; |
930 | |
3749 | |
931 | evw_init (&once->io, once_cb_io); |
3750 | ev_init (&once->io, once_cb_io); |
932 | |
|
|
933 | if (fd >= 0) |
3751 | if (fd >= 0) |
|
|
3752 | { |
|
|
3753 | ev_io_set (&once->io, fd, events); |
|
|
3754 | ev_io_start (EV_A_ &once->io); |
|
|
3755 | } |
|
|
3756 | |
|
|
3757 | ev_init (&once->to, once_cb_to); |
|
|
3758 | if (timeout >= 0.) |
|
|
3759 | { |
|
|
3760 | ev_timer_set (&once->to, timeout, 0.); |
|
|
3761 | ev_timer_start (EV_A_ &once->to); |
|
|
3762 | } |
|
|
3763 | } |
|
|
3764 | |
|
|
3765 | /*****************************************************************************/ |
|
|
3766 | |
|
|
3767 | #if EV_WALK_ENABLE |
|
|
3768 | void |
|
|
3769 | ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) |
|
|
3770 | { |
|
|
3771 | int i, j; |
|
|
3772 | ev_watcher_list *wl, *wn; |
|
|
3773 | |
|
|
3774 | if (types & (EV_IO | EV_EMBED)) |
|
|
3775 | for (i = 0; i < anfdmax; ++i) |
|
|
3776 | for (wl = anfds [i].head; wl; ) |
934 | { |
3777 | { |
935 | evio_set (&once->io, fd, events); |
3778 | wn = wl->next; |
936 | evio_start (&once->io); |
3779 | |
|
|
3780 | #if EV_EMBED_ENABLE |
|
|
3781 | if (ev_cb ((ev_io *)wl) == embed_io_cb) |
|
|
3782 | { |
|
|
3783 | if (types & EV_EMBED) |
|
|
3784 | cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); |
|
|
3785 | } |
|
|
3786 | else |
|
|
3787 | #endif |
|
|
3788 | #if EV_USE_INOTIFY |
|
|
3789 | if (ev_cb ((ev_io *)wl) == infy_cb) |
|
|
3790 | ; |
|
|
3791 | else |
|
|
3792 | #endif |
|
|
3793 | if ((ev_io *)wl != &pipe_w) |
|
|
3794 | if (types & EV_IO) |
|
|
3795 | cb (EV_A_ EV_IO, wl); |
|
|
3796 | |
|
|
3797 | wl = wn; |
937 | } |
3798 | } |
938 | |
3799 | |
939 | evw_init (&once->to, once_cb_to); |
3800 | if (types & (EV_TIMER | EV_STAT)) |
940 | |
3801 | for (i = timercnt + HEAP0; i-- > HEAP0; ) |
941 | if (timeout >= 0.) |
3802 | #if EV_STAT_ENABLE |
|
|
3803 | /*TODO: timer is not always active*/ |
|
|
3804 | if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) |
942 | { |
3805 | { |
943 | evtimer_set (&once->to, timeout, 0.); |
3806 | if (types & EV_STAT) |
944 | evtimer_start (&once->to); |
3807 | cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); |
945 | } |
3808 | } |
946 | } |
3809 | else |
947 | } |
3810 | #endif |
|
|
3811 | if (types & EV_TIMER) |
|
|
3812 | cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); |
948 | |
3813 | |
949 | /*****************************************************************************/ |
3814 | #if EV_PERIODIC_ENABLE |
|
|
3815 | if (types & EV_PERIODIC) |
|
|
3816 | for (i = periodiccnt + HEAP0; i-- > HEAP0; ) |
|
|
3817 | cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); |
|
|
3818 | #endif |
950 | |
3819 | |
951 | #if 0 |
3820 | #if EV_IDLE_ENABLE |
|
|
3821 | if (types & EV_IDLE) |
|
|
3822 | for (j = NUMPRI; i--; ) |
|
|
3823 | for (i = idlecnt [j]; i--; ) |
|
|
3824 | cb (EV_A_ EV_IDLE, idles [j][i]); |
|
|
3825 | #endif |
952 | |
3826 | |
953 | struct ev_io wio; |
3827 | #if EV_FORK_ENABLE |
|
|
3828 | if (types & EV_FORK) |
|
|
3829 | for (i = forkcnt; i--; ) |
|
|
3830 | if (ev_cb (forks [i]) != embed_fork_cb) |
|
|
3831 | cb (EV_A_ EV_FORK, forks [i]); |
|
|
3832 | #endif |
954 | |
3833 | |
955 | static void |
3834 | #if EV_ASYNC_ENABLE |
956 | sin_cb (struct ev_io *w, int revents) |
3835 | if (types & EV_ASYNC) |
957 | { |
3836 | for (i = asynccnt; i--; ) |
958 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
3837 | cb (EV_A_ EV_ASYNC, asyncs [i]); |
959 | } |
3838 | #endif |
960 | |
3839 | |
961 | static void |
3840 | #if EV_PREPARE_ENABLE |
962 | ocb (struct ev_timer *w, int revents) |
3841 | if (types & EV_PREPARE) |
963 | { |
3842 | for (i = preparecnt; i--; ) |
964 | //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
3843 | # if EV_EMBED_ENABLE |
965 | evtimer_stop (w); |
3844 | if (ev_cb (prepares [i]) != embed_prepare_cb) |
966 | evtimer_start (w); |
|
|
967 | } |
|
|
968 | |
|
|
969 | static void |
|
|
970 | scb (struct ev_signal *w, int revents) |
|
|
971 | { |
|
|
972 | fprintf (stderr, "signal %x,%d\n", revents, w->signum); |
|
|
973 | evio_stop (&wio); |
|
|
974 | evio_start (&wio); |
|
|
975 | } |
|
|
976 | |
|
|
977 | static void |
|
|
978 | gcb (struct ev_signal *w, int revents) |
|
|
979 | { |
|
|
980 | fprintf (stderr, "generic %x\n", revents); |
|
|
981 | |
|
|
982 | } |
|
|
983 | |
|
|
984 | int main (void) |
|
|
985 | { |
|
|
986 | ev_init (0); |
|
|
987 | |
|
|
988 | evio_init (&wio, sin_cb, 0, EV_READ); |
|
|
989 | evio_start (&wio); |
|
|
990 | |
|
|
991 | struct ev_timer t[10000]; |
|
|
992 | |
|
|
993 | #if 0 |
|
|
994 | int i; |
|
|
995 | for (i = 0; i < 10000; ++i) |
|
|
996 | { |
|
|
997 | struct ev_timer *w = t + i; |
|
|
998 | evw_init (w, ocb, i); |
|
|
999 | evtimer_init_abs (w, ocb, drand48 (), 0.99775533); |
|
|
1000 | evtimer_start (w); |
|
|
1001 | if (drand48 () < 0.5) |
|
|
1002 | evtimer_stop (w); |
|
|
1003 | } |
|
|
1004 | #endif |
3845 | # endif |
1005 | |
3846 | cb (EV_A_ EV_PREPARE, prepares [i]); |
1006 | struct ev_timer t1; |
|
|
1007 | evtimer_init (&t1, ocb, 5, 10); |
|
|
1008 | evtimer_start (&t1); |
|
|
1009 | |
|
|
1010 | struct ev_signal sig; |
|
|
1011 | evsignal_init (&sig, scb, SIGQUIT); |
|
|
1012 | evsignal_start (&sig); |
|
|
1013 | |
|
|
1014 | struct ev_check cw; |
|
|
1015 | evcheck_init (&cw, gcb); |
|
|
1016 | evcheck_start (&cw); |
|
|
1017 | |
|
|
1018 | struct ev_idle iw; |
|
|
1019 | evidle_init (&iw, gcb); |
|
|
1020 | evidle_start (&iw); |
|
|
1021 | |
|
|
1022 | ev_loop (0); |
|
|
1023 | |
|
|
1024 | return 0; |
|
|
1025 | } |
|
|
1026 | |
|
|
1027 | #endif |
3847 | #endif |
1028 | |
3848 | |
|
|
3849 | #if EV_CHECK_ENABLE |
|
|
3850 | if (types & EV_CHECK) |
|
|
3851 | for (i = checkcnt; i--; ) |
|
|
3852 | cb (EV_A_ EV_CHECK, checks [i]); |
|
|
3853 | #endif |
1029 | |
3854 | |
|
|
3855 | #if EV_SIGNAL_ENABLE |
|
|
3856 | if (types & EV_SIGNAL) |
|
|
3857 | for (i = 0; i < EV_NSIG - 1; ++i) |
|
|
3858 | for (wl = signals [i].head; wl; ) |
|
|
3859 | { |
|
|
3860 | wn = wl->next; |
|
|
3861 | cb (EV_A_ EV_SIGNAL, wl); |
|
|
3862 | wl = wn; |
|
|
3863 | } |
|
|
3864 | #endif |
1030 | |
3865 | |
|
|
3866 | #if EV_CHILD_ENABLE |
|
|
3867 | if (types & EV_CHILD) |
|
|
3868 | for (i = (EV_PID_HASHSIZE); i--; ) |
|
|
3869 | for (wl = childs [i]; wl; ) |
|
|
3870 | { |
|
|
3871 | wn = wl->next; |
|
|
3872 | cb (EV_A_ EV_CHILD, wl); |
|
|
3873 | wl = wn; |
|
|
3874 | } |
|
|
3875 | #endif |
|
|
3876 | /* EV_STAT 0x00001000 /* stat data changed */ |
|
|
3877 | /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
|
|
3878 | } |
|
|
3879 | #endif |
1031 | |
3880 | |
|
|
3881 | #if EV_MULTIPLICITY |
|
|
3882 | #include "ev_wrap.h" |
|
|
3883 | #endif |
|
|
3884 | |
|
|
3885 | EV_CPP(}) |
|
|
3886 | |