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1 | /* |
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2 | * libev native API header |
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3 | * |
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4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without modifica- |
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8 | * tion, are permitted provided that the following conditions are met: |
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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. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License ("GPL") version 2 or any later version, |
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30 | * in which case the provisions of the GPL are applicable instead of |
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31 | * the above. If you wish to allow the use of your version of this file |
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32 | * only under the terms of the GPL and not to allow others to use your |
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33 | * version of this file under the BSD license, indicate your decision |
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34 | * by deleting the provisions above and replace them with the notice |
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35 | * and other provisions required by the GPL. If you do not delete the |
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36 | * provisions above, a recipient may use your version of this file under |
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37 | * either the BSD or the GPL. |
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38 | */ |
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39 | |
1 | #ifndef EV_H |
40 | #ifndef EV_H__ |
2 | #define EV_H |
41 | #define EV_H__ |
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42 | |
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43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
3 | |
46 | |
4 | typedef double ev_tstamp; |
47 | typedef double ev_tstamp; |
5 | |
48 | |
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49 | /* these priorities are inclusive, higher priorities will be called earlier */ |
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50 | #ifndef EV_MINPRI |
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51 | # define EV_MINPRI -2 |
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52 | #endif |
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53 | #ifndef EV_MAXPRI |
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54 | # define EV_MAXPRI +2 |
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55 | #endif |
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56 | |
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57 | #ifndef EV_MULTIPLICITY |
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58 | # define EV_MULTIPLICITY 1 |
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59 | #endif |
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60 | |
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61 | #ifndef EV_PERIODIC_ENABLE |
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62 | # define EV_PERIODIC_ENABLE 1 |
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63 | #endif |
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64 | |
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65 | #ifndef EV_STAT_ENABLE |
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66 | # define EV_STAT_ENABLE 1 |
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67 | #endif |
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68 | |
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69 | #ifndef EV_IDLE_ENABLE |
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70 | # define EV_IDLE_ENABLE 1 |
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71 | #endif |
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72 | |
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73 | #ifndef EV_FORK_ENABLE |
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74 | # define EV_FORK_ENABLE 1 |
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75 | #endif |
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76 | |
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77 | #ifndef EV_EMBED_ENABLE |
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78 | # define EV_EMBED_ENABLE 1 |
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79 | #endif |
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80 | |
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81 | #ifndef EV_ASYNC_ENABLE |
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82 | # define EV_ASYNC_ENABLE 1 |
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83 | #endif |
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84 | |
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85 | #ifndef EV_ATOMIC_T |
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86 | # include <signal.h> |
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87 | # define EV_ATOMIC_T sig_atomic_t volatile |
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88 | #endif |
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89 | |
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90 | /*****************************************************************************/ |
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91 | |
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92 | #if EV_STAT_ENABLE |
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93 | # ifdef _WIN32 |
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94 | # include <time.h> |
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95 | # include <sys/types.h> |
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96 | # endif |
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97 | # include <sys/stat.h> |
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98 | #endif |
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99 | |
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100 | /* support multiple event loops? */ |
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101 | #if EV_MULTIPLICITY |
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102 | struct ev_loop; |
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103 | # define EV_P struct ev_loop *loop |
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104 | # define EV_P_ EV_P, |
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105 | # define EV_A loop |
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106 | # define EV_A_ EV_A, |
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107 | # define EV_DEFAULT_UC ev_default_loop_uc () |
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108 | # define EV_DEFAULT_UC_ EV_DEFAULT_UC, |
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109 | # define EV_DEFAULT ev_default_loop (0) |
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110 | # define EV_DEFAULT_ EV_DEFAULT, |
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111 | #else |
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112 | # define EV_P void |
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113 | # define EV_P_ |
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114 | # define EV_A |
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115 | # define EV_A_ |
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116 | # define EV_DEFAULT |
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117 | # define EV_DEFAULT_ |
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118 | # define EV_DEFAULT_UC |
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119 | # define EV_DEFAULT_UC_ |
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120 | # undef EV_EMBED_ENABLE |
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121 | #endif |
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122 | |
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123 | #if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3 |
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124 | # define EV_INLINE static inline |
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125 | #else |
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126 | # define EV_INLINE static |
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127 | #endif |
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128 | |
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129 | /*****************************************************************************/ |
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130 | |
6 | /* eventmask, revents, events... */ |
131 | /* eventmask, revents, events... */ |
7 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
132 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
8 | #define EV_NONE 0x00 |
133 | #define EV_NONE 0x00 /* no events */ |
9 | #define EV_READ 0x01 |
134 | #define EV_READ 0x01 /* ev_io detected read will not block */ |
10 | #define EV_WRITE 0x02 |
135 | #define EV_WRITE 0x02 /* ev_io detected write will not block */ |
11 | #define EV_TIMEOUT 0x04 |
136 | #define EV_IOFDSET 0x80 /* internal use only */ |
12 | #define EV_SIGNAL 0x08 |
137 | #define EV_TIMEOUT 0x00000100 /* timer timed out */ |
13 | #define EV_IDLE 0x10 |
138 | #define EV_PERIODIC 0x00000200 /* periodic timer timed out */ |
14 | #define EV_CHECK 0x20 |
139 | #define EV_SIGNAL 0x00000400 /* signal was received */ |
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140 | #define EV_CHILD 0x00000800 /* child/pid had status change */ |
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141 | #define EV_STAT 0x00001000 /* stat data changed */ |
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142 | #define EV_IDLE 0x00002000 /* event loop is idling */ |
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143 | #define EV_PREPARE 0x00004000 /* event loop about to poll */ |
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144 | #define EV_CHECK 0x00008000 /* event loop finished poll */ |
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145 | #define EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
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146 | #define EV_FORK 0x00020000 /* event loop resumed in child */ |
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147 | #define EV_ASYNC 0x00040000 /* async intra-loop signal */ |
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148 | #define EV_ERROR 0x80000000 /* sent when an error occurs */ |
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149 | |
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150 | /* can be used to add custom fields to all watchers, while losing binary compatibility */ |
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151 | #ifndef EV_COMMON |
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152 | # define EV_COMMON void *data; |
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153 | #endif |
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154 | #ifndef EV_PROTOTYPES |
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155 | # define EV_PROTOTYPES 1 |
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156 | #endif |
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157 | |
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158 | #define EV_VERSION_MAJOR 3 |
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159 | #define EV_VERSION_MINOR 0 |
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160 | |
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161 | #ifndef EV_CB_DECLARE |
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162 | # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); |
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163 | #endif |
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164 | #ifndef EV_CB_INVOKE |
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165 | # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) |
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166 | #endif |
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167 | |
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168 | /* |
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169 | * struct member types: |
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170 | * private: you can look at them, but not change them, and they might not mean anything to you. |
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171 | * ro: can be read anytime, but only changed when the watcher isn't active |
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172 | * rw: can be read and modified anytime, even when the watcher is active |
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173 | * |
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174 | * some internal details that might be helpful for debugging: |
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175 | * |
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176 | * active is either 0, which means the watcher is not active, |
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177 | * or the array index of the watcher (periodics, timers) |
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178 | * or the array index + 1 (most other watchers) |
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179 | * or simply 1 for watchers that aren't in some array. |
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180 | * pending is either 0, in which case the watcher isn't, |
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181 | * or the array index + 1 in the pendings array. |
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182 | */ |
15 | |
183 | |
16 | /* shared by all watchers */ |
184 | /* shared by all watchers */ |
17 | #define EV_WATCHER(type) \ |
185 | #define EV_WATCHER(type) \ |
18 | int active; /* private */ \ |
186 | int active; /* private */ \ |
19 | int pending; /* private */ \ |
187 | int pending; /* private */ \ |
20 | void *data; /* rw */ \ |
188 | int priority; /* private */ \ |
21 | void (*cb)(struct type *, int revents) /* rw */ /* gets invoked with an eventmask */ |
189 | EV_COMMON /* rw */ \ |
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190 | EV_CB_DECLARE (type) /* private */ |
22 | |
191 | |
23 | #define EV_WATCHER_LIST(type) \ |
192 | #define EV_WATCHER_LIST(type) \ |
24 | EV_WATCHER (type); \ |
193 | EV_WATCHER (type) \ |
25 | struct type *next /* private */ |
194 | struct ev_watcher_list *next; /* private */ |
26 | |
195 | |
27 | /* invoked at a specific time or after a specific time, repeatable */ |
196 | #define EV_WATCHER_TIME(type) \ |
28 | struct ev_timer |
197 | EV_WATCHER (type) \ |
29 | { |
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30 | EV_WATCHER_LIST (ev_timer); |
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31 | |
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32 | ev_tstamp at; /* private */ |
198 | ev_tstamp at; /* private */ |
33 | ev_tstamp repeat; /* rw */ |
199 | |
34 | unsigned char is_abs; /* ro */ |
200 | /* base class, nothing to see here unless you subclass */ |
35 | }; |
201 | typedef struct ev_watcher |
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202 | { |
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203 | EV_WATCHER (ev_watcher) |
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204 | } ev_watcher; |
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205 | |
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206 | /* base class, nothing to see here unless you subclass */ |
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207 | typedef struct ev_watcher_list |
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208 | { |
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209 | EV_WATCHER_LIST (ev_watcher_list) |
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210 | } ev_watcher_list; |
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211 | |
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212 | /* base class, nothing to see here unless you subclass */ |
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213 | typedef struct ev_watcher_time |
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214 | { |
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215 | EV_WATCHER_TIME (ev_watcher_time) |
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216 | } ev_watcher_time; |
36 | |
217 | |
37 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
218 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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219 | /* revent EV_READ, EV_WRITE */ |
38 | struct ev_io |
220 | typedef struct ev_io |
39 | { |
221 | { |
40 | EV_WATCHER_LIST (ev_io); |
222 | EV_WATCHER_LIST (ev_io) |
41 | |
223 | |
42 | int fd; /* ro */ |
224 | int fd; /* ro */ |
43 | int events; /* ro */ |
225 | int events; /* ro */ |
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226 | } ev_io; |
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227 | |
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228 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
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229 | /* revent EV_TIMEOUT */ |
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230 | typedef struct ev_timer |
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231 | { |
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232 | EV_WATCHER_TIME (ev_timer) |
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233 | |
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234 | ev_tstamp repeat; /* rw */ |
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235 | } ev_timer; |
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236 | |
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237 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
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238 | /* revent EV_PERIODIC */ |
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239 | typedef struct ev_periodic |
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240 | { |
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241 | EV_WATCHER_TIME (ev_periodic) |
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242 | |
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243 | ev_tstamp offset; /* rw */ |
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244 | ev_tstamp interval; /* rw */ |
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245 | ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ |
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246 | } ev_periodic; |
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247 | |
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248 | /* invoked when the given signal has been received */ |
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249 | /* revent EV_SIGNAL */ |
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250 | typedef struct ev_signal |
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251 | { |
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252 | EV_WATCHER_LIST (ev_signal) |
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253 | |
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254 | int signum; /* ro */ |
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255 | } ev_signal; |
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256 | |
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257 | /* invoked when sigchld is received and waitpid indicates the given pid */ |
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258 | /* revent EV_CHILD */ |
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259 | /* does not support priorities */ |
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260 | typedef struct ev_child |
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261 | { |
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262 | EV_WATCHER_LIST (ev_child) |
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263 | |
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264 | int flags; /* private */ |
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265 | int pid; /* ro */ |
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266 | int rpid; /* rw, holds the received pid */ |
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267 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
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268 | } ev_child; |
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269 | |
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270 | #if EV_STAT_ENABLE |
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271 | /* st_nlink = 0 means missing file or other error */ |
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272 | # ifdef _WIN32 |
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273 | typedef struct _stati64 ev_statdata; |
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274 | # else |
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275 | typedef struct stat ev_statdata; |
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276 | # endif |
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277 | |
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278 | /* invoked each time the stat data changes for a given path */ |
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279 | /* revent EV_STAT */ |
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280 | typedef struct ev_stat |
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281 | { |
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282 | EV_WATCHER_LIST (ev_stat) |
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283 | |
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284 | ev_timer timer; /* private */ |
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285 | ev_tstamp interval; /* ro */ |
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286 | const char *path; /* ro */ |
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287 | ev_statdata prev; /* ro */ |
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288 | ev_statdata attr; /* ro */ |
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289 | |
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290 | int wd; /* wd for inotify, fd for kqueue */ |
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291 | } ev_stat; |
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292 | #endif |
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293 | |
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294 | #if EV_IDLE_ENABLE |
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295 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
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296 | /* revent EV_IDLE */ |
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297 | typedef struct ev_idle |
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298 | { |
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299 | EV_WATCHER (ev_idle) |
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300 | } ev_idle; |
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301 | #endif |
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302 | |
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303 | /* invoked for each run of the mainloop, just before the blocking call */ |
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304 | /* you can still change events in any way you like */ |
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305 | /* revent EV_PREPARE */ |
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306 | typedef struct ev_prepare |
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307 | { |
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308 | EV_WATCHER (ev_prepare) |
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309 | } ev_prepare; |
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310 | |
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311 | /* invoked for each run of the mainloop, just after the blocking call */ |
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312 | /* revent EV_CHECK */ |
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313 | typedef struct ev_check |
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314 | { |
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315 | EV_WATCHER (ev_check) |
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316 | } ev_check; |
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317 | |
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318 | #if EV_FORK_ENABLE |
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319 | /* the callback gets invoked before check in the child process when a fork was detected */ |
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320 | typedef struct ev_fork |
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321 | { |
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322 | EV_WATCHER (ev_fork) |
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323 | } ev_fork; |
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324 | #endif |
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325 | |
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326 | #if EV_EMBED_ENABLE |
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327 | /* used to embed an event loop inside another */ |
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328 | /* the callback gets invoked when the event loop has handled events, and can be 0 */ |
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329 | typedef struct ev_embed |
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330 | { |
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331 | EV_WATCHER (ev_embed) |
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332 | |
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333 | struct ev_loop *other; /* ro */ |
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334 | ev_io io; /* private */ |
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335 | ev_prepare prepare; /* private */ |
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336 | ev_check check; /* unused */ |
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337 | ev_timer timer; /* unused */ |
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338 | ev_periodic periodic; /* unused */ |
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339 | ev_idle idle; /* unused */ |
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340 | ev_fork fork; /* unused */ |
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341 | } ev_embed; |
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342 | #endif |
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343 | |
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344 | #if EV_ASYNC_ENABLE |
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345 | /* invoked when somebody calls ev_async_send on the watcher */ |
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346 | /* revent EV_ASYNC */ |
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347 | typedef struct ev_async |
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348 | { |
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349 | EV_WATCHER (ev_async) |
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350 | |
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351 | EV_ATOMIC_T sent; /* private */ |
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352 | } ev_async; |
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353 | |
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354 | # define ev_async_pending(w) ((w)->sent + 0) |
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355 | #endif |
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356 | |
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357 | /* the presence of this union forces similar struct layout */ |
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358 | union ev_any_watcher |
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359 | { |
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360 | struct ev_watcher w; |
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361 | struct ev_watcher_list wl; |
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362 | |
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363 | struct ev_io io; |
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364 | struct ev_timer timer; |
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365 | struct ev_periodic periodic; |
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366 | struct ev_signal signal; |
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367 | struct ev_child child; |
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368 | #if EV_STAT_ENABLE |
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369 | struct ev_stat stat; |
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370 | #endif |
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371 | #if EV_IDLE_ENABLE |
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372 | struct ev_idle idle; |
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373 | #endif |
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374 | struct ev_prepare prepare; |
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375 | struct ev_check check; |
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376 | #if EV_FORK_ENABLE |
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377 | struct ev_fork fork; |
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378 | #endif |
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379 | #if EV_EMBED_ENABLE |
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380 | struct ev_embed embed; |
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381 | #endif |
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382 | #if EV_ASYNC_ENABLE |
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383 | struct ev_async async; |
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384 | #endif |
44 | }; |
385 | }; |
45 | |
386 | |
46 | /* invoked when the given signal has been received */ |
387 | /* bits for ev_default_loop and ev_loop_new */ |
47 | struct ev_signal |
388 | /* the default */ |
48 | { |
389 | #define EVFLAG_AUTO 0x00000000U /* not quite a mask */ |
49 | EV_WATCHER_LIST (ev_signal); |
390 | /* flag bits */ |
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391 | #define EVFLAG_NOENV 0x01000000U /* do NOT consult environment */ |
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392 | #define EVFLAG_FORKCHECK 0x02000000U /* check for a fork in each iteration */ |
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393 | /* method bits to be ored together */ |
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394 | #define EVBACKEND_SELECT 0x00000001U /* about anywhere */ |
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395 | #define EVBACKEND_POLL 0x00000002U /* !win */ |
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396 | #define EVBACKEND_EPOLL 0x00000004U /* linux */ |
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397 | #define EVBACKEND_KQUEUE 0x00000008U /* bsd */ |
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398 | #define EVBACKEND_DEVPOLL 0x00000010U /* solaris 8 */ /* NYI */ |
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399 | #define EVBACKEND_PORT 0x00000020U /* solaris 10 */ |
50 | |
400 | |
51 | int signum; /* ro */ |
401 | #if EV_PROTOTYPES |
52 | }; |
402 | int ev_version_major (void); |
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403 | int ev_version_minor (void); |
53 | |
404 | |
54 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
405 | unsigned int ev_supported_backends (void); |
55 | struct ev_idle |
406 | unsigned int ev_recommended_backends (void); |
56 | { |
407 | unsigned int ev_embeddable_backends (void); |
57 | EV_WATCHER (ev_idle); |
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58 | }; |
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59 | |
408 | |
60 | /* invoked for each run of the mainloop, just before the next blocking vall is initiated */ |
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61 | struct ev_check |
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62 | { |
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63 | EV_WATCHER (ev_check); |
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64 | }; |
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65 | |
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66 | #define EVMETHOD_NONE 0 |
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67 | #define EVMETHOD_SELECT 1 |
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68 | #define EVMETHOD_EPOLL 2 |
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69 | int ev_init (int flags); /* returns ev_method */ |
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70 | extern int ev_method; |
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71 | |
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72 | /* these three calls are suitable for plugging into pthread_atfork */ |
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73 | void ev_prefork (void); |
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74 | void ev_postfork_parent (void); |
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75 | void ev_postfork_child (void); |
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76 | |
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77 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
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78 | ev_tstamp ev_time (void); |
409 | ev_tstamp ev_time (void); |
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410 | void ev_sleep (ev_tstamp delay); /* sleep for a while */ |
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411 | |
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412 | /* Sets the allocation function to use, works like realloc. |
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413 | * It is used to allocate and free memory. |
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414 | * If it returns zero when memory needs to be allocated, the library might abort |
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415 | * or take some potentially destructive action. |
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416 | * The default is your system realloc function. |
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417 | */ |
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418 | void ev_set_allocator (void *(*cb)(void *ptr, long size)); |
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419 | |
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420 | /* set the callback function to call on a |
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421 | * retryable syscall error |
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422 | * (such as failed select, poll, epoll_wait) |
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423 | */ |
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424 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
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425 | |
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426 | #if EV_MULTIPLICITY |
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427 | EV_INLINE struct ev_loop * |
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428 | ev_default_loop_uc (void) |
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429 | { |
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430 | extern struct ev_loop *ev_default_loop_ptr; |
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431 | |
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432 | return ev_default_loop_ptr; |
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433 | } |
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434 | |
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435 | /* the default loop is the only one that handles signals and child watchers */ |
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436 | /* you can call this as often as you like */ |
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437 | EV_INLINE struct ev_loop * |
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438 | ev_default_loop (unsigned int flags) |
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439 | { |
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440 | struct ev_loop *loop = ev_default_loop_uc (); |
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441 | |
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442 | if (!loop) |
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443 | { |
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444 | extern struct ev_loop *ev_default_loop_init (unsigned int flags); |
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445 | |
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446 | loop = ev_default_loop_init (flags); |
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447 | } |
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448 | |
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449 | return loop; |
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450 | } |
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451 | |
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452 | /* create and destroy alternative loops that don't handle signals */ |
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453 | struct ev_loop *ev_loop_new (unsigned int flags); |
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454 | void ev_loop_destroy (EV_P); |
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455 | void ev_loop_fork (EV_P); |
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456 | void ev_loop_verify (EV_P); |
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457 | |
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458 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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459 | |
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460 | #else |
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461 | |
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462 | int ev_default_loop (unsigned int flags); /* returns true when successful */ |
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463 | |
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464 | EV_INLINE ev_tstamp |
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465 | ev_now (void) |
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466 | { |
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467 | extern ev_tstamp ev_rt_now; |
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468 | |
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469 | return ev_rt_now; |
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470 | } |
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471 | #endif /* multiplicity */ |
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472 | |
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473 | EV_INLINE int |
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474 | ev_is_default_loop (EV_P) |
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475 | { |
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476 | #if EV_MULTIPLICITY |
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477 | extern struct ev_loop *ev_default_loop_ptr; |
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478 | |
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479 | return !!(EV_A == ev_default_loop_ptr); |
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480 | #else |
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481 | return 1; |
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482 | #endif |
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483 | } |
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484 | |
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485 | void ev_default_destroy (void); /* destroy the default loop */ |
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486 | /* this needs to be called after fork, to duplicate the default loop */ |
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487 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
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488 | /* you can call it in either the parent or the child */ |
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489 | /* you can actually call it at any time, anywhere :) */ |
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490 | void ev_default_fork (void); |
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491 | |
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492 | unsigned int ev_backend (EV_P); /* backend in use by loop */ |
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493 | unsigned int ev_loop_count (EV_P); /* number of loop iterations */ |
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494 | #endif /* prototypes */ |
79 | |
495 | |
80 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
496 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
81 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
497 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
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498 | #define EVUNLOOP_CANCEL 0 /* undo unloop */ |
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499 | #define EVUNLOOP_ONE 1 /* unloop once */ |
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500 | #define EVUNLOOP_ALL 2 /* unloop all loops */ |
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501 | |
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502 | #if EV_PROTOTYPES |
82 | void ev_loop (int flags); |
503 | void ev_loop (EV_P_ int flags); |
83 | extern int ev_loop_done; /* set to 1 to break out of event loop */ |
504 | void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
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505 | |
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506 | void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ |
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507 | void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ |
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508 | |
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509 | /* |
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510 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
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511 | * keeps one reference. if you have a long-runing watcher you never unregister that |
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512 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
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513 | */ |
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514 | void ev_ref (EV_P); |
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515 | void ev_unref (EV_P); |
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516 | |
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517 | /* convinience function, wait for a single event, without registering an event watcher */ |
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518 | /* if timeout is < 0, do wait indefinitely */ |
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519 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
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520 | #endif |
84 | |
521 | |
85 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
522 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
86 | #define evw_init(ev,cb_,data_) do { (ev)->active = 0; (ev)->cb = (cb_); (ev)->data = (void *)data_; } while (0) |
523 | /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
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524 | #define ev_init(ev,cb_) do { \ |
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525 | ((ev_watcher *)(void *)(ev))->active = \ |
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526 | ((ev_watcher *)(void *)(ev))->pending = \ |
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527 | ((ev_watcher *)(void *)(ev))->priority = 0; \ |
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528 | ev_set_cb ((ev), cb_); \ |
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529 | } while (0) |
87 | |
530 | |
88 | #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
531 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV_IOFDSET; } while (0) |
89 | #define evtimer_set_rel(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); (ev)->is_abs = 0; } while (0) |
532 | #define ev_timer_set(ev,after_,repeat_) do { ((ev_watcher_time *)(ev))->at = (after_); (ev)->repeat = (repeat_); } while (0) |
90 | #define evtimer_set_abs(ev,at_,repeat_) do { (ev)->at = (at_); (ev)->repeat = (repeat_); (ev)->is_abs = 1; } while (0) |
533 | #define ev_periodic_set(ev,ofs_,ival_,res_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) |
91 | #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
534 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
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535 | #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) |
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536 | #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) |
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537 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
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538 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
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539 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
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540 | #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) |
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541 | #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ |
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542 | #define ev_async_set(ev) do { (ev)->sent = 0; } while (0) |
92 | |
543 | |
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544 | #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
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545 | #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
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546 | #define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) |
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547 | #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
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548 | #define ev_child_init(ev,cb,pid,trace) do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0) |
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549 | #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) |
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550 | #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
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551 | #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
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552 | #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
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553 | #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) |
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554 | #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) |
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555 | #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) |
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556 | |
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557 | #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
93 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
558 | #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
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559 | |
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560 | #define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0) |
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561 | #define ev_cb(ev) (ev)->cb /* rw */ |
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562 | #define ev_set_priority(ev,pri) ((ev_watcher *)(void *)(ev))->priority = (pri) |
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563 | |
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564 | #define ev_periodic_at(ev) (((ev_watcher_time *)(ev))->at + 0.) |
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565 | |
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566 | #ifndef ev_set_cb |
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567 | # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
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568 | #endif |
94 | |
569 | |
95 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
570 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
96 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
571 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
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572 | #if EV_PROTOTYPES |
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573 | |
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574 | /* feeds an event into a watcher as if the event actually occured */ |
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575 | /* accepts any ev_watcher type */ |
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576 | void ev_feed_event (EV_P_ void *w, int revents); |
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577 | void ev_feed_fd_event (EV_P_ int fd, int revents); |
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578 | void ev_feed_signal_event (EV_P_ int signum); |
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579 | void ev_invoke (EV_P_ void *w, int revents); |
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580 | int ev_clear_pending (EV_P_ void *w); |
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581 | |
97 | void evio_start (struct ev_io *w); |
582 | void ev_io_start (EV_P_ ev_io *w); |
98 | void evio_stop (struct ev_io *w); |
583 | void ev_io_stop (EV_P_ ev_io *w); |
99 | |
584 | |
100 | void evtimer_start (struct ev_timer *w); |
585 | void ev_timer_start (EV_P_ ev_timer *w); |
101 | void evtimer_stop (struct ev_timer *w); |
586 | void ev_timer_stop (EV_P_ ev_timer *w); |
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587 | /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
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588 | void ev_timer_again (EV_P_ ev_timer *w); |
102 | |
589 | |
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590 | #if EV_PERIODIC_ENABLE |
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591 | void ev_periodic_start (EV_P_ ev_periodic *w); |
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592 | void ev_periodic_stop (EV_P_ ev_periodic *w); |
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593 | void ev_periodic_again (EV_P_ ev_periodic *w); |
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594 | #endif |
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595 | |
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596 | /* only supported in the default loop */ |
103 | void evsignal_start (struct ev_signal *w); |
597 | void ev_signal_start (EV_P_ ev_signal *w); |
104 | void evsignal_stop (struct ev_signal *w); |
598 | void ev_signal_stop (EV_P_ ev_signal *w); |
105 | |
599 | |
106 | void evidle_start (struct ev_idle *w); |
600 | /* only supported in the default loop */ |
107 | void evidle_stop (struct ev_idle *w); |
601 | void ev_child_start (EV_P_ ev_child *w); |
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602 | void ev_child_stop (EV_P_ ev_child *w); |
108 | |
603 | |
109 | void evcheck_start (struct ev_check *w); |
604 | # if EV_STAT_ENABLE |
110 | void evcheck_stop (struct ev_check *w); |
605 | void ev_stat_start (EV_P_ ev_stat *w); |
111 | |
606 | void ev_stat_stop (EV_P_ ev_stat *w); |
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607 | void ev_stat_stat (EV_P_ ev_stat *w); |
112 | #endif |
608 | # endif |
113 | |
609 | |
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610 | # if EV_IDLE_ENABLE |
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611 | void ev_idle_start (EV_P_ ev_idle *w); |
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612 | void ev_idle_stop (EV_P_ ev_idle *w); |
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613 | # endif |
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614 | |
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615 | void ev_prepare_start (EV_P_ ev_prepare *w); |
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616 | void ev_prepare_stop (EV_P_ ev_prepare *w); |
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617 | |
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618 | void ev_check_start (EV_P_ ev_check *w); |
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619 | void ev_check_stop (EV_P_ ev_check *w); |
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620 | |
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621 | # if EV_FORK_ENABLE |
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622 | void ev_fork_start (EV_P_ ev_fork *w); |
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623 | void ev_fork_stop (EV_P_ ev_fork *w); |
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624 | # endif |
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625 | |
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626 | # if EV_EMBED_ENABLE |
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627 | /* only supported when loop to be embedded is in fact embeddable */ |
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628 | void ev_embed_start (EV_P_ ev_embed *w); |
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629 | void ev_embed_stop (EV_P_ ev_embed *w); |
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630 | void ev_embed_sweep (EV_P_ ev_embed *w); |
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631 | # endif |
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632 | |
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633 | # if EV_ASYNC_ENABLE |
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634 | void ev_async_start (EV_P_ ev_async *w); |
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635 | void ev_async_stop (EV_P_ ev_async *w); |
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636 | void ev_async_send (EV_P_ ev_async *w); |
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637 | # endif |
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638 | |
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639 | #endif |
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640 | |
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641 | #ifdef __cplusplus |
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642 | } |
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643 | #endif |
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644 | |
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645 | #endif |
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646 | |