1 | /* |
1 | /* |
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2 | * libev native API header |
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3 | * |
2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008 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 | */ |
29 | |
39 | |
30 | #ifndef EV_H |
40 | #ifndef EV_H__ |
31 | #define EV_H |
41 | #define EV_H__ |
32 | |
42 | |
33 | #ifdef __cplusplus |
43 | #ifdef __cplusplus |
34 | extern "C" { |
44 | extern "C" { |
35 | #endif |
45 | #endif |
36 | |
46 | |
37 | typedef double ev_tstamp; |
47 | typedef double ev_tstamp; |
38 | |
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 | # include <sys/stat.h> |
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94 | #endif |
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95 | |
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96 | /* support multiple event loops? */ |
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97 | #if EV_MULTIPLICITY |
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98 | struct ev_loop; |
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99 | # define EV_P struct ev_loop *loop |
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100 | # define EV_P_ EV_P, |
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101 | # define EV_A loop |
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102 | # define EV_A_ EV_A, |
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103 | # define EV_DEFAULT ev_default_loop (0) |
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104 | # define EV_DEFAULT_ EV_DEFAULT, |
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105 | #else |
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106 | # define EV_P void |
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107 | # define EV_P_ |
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108 | # define EV_A |
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109 | # define EV_A_ |
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110 | # define EV_DEFAULT |
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111 | # define EV_DEFAULT_ |
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112 | |
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113 | # undef EV_EMBED_ENABLE |
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114 | #endif |
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115 | |
39 | /* eventmask, revents, events... */ |
116 | /* eventmask, revents, events... */ |
40 | #define EV_UNDEF -1 /* guaranteed to be invalid */ |
117 | #define EV_UNDEF -1L /* guaranteed to be invalid */ |
41 | #define EV_NONE 0x00 |
118 | #define EV_NONE 0x00L /* no events */ |
42 | #define EV_READ 0x01 |
119 | #define EV_READ 0x01L /* ev_io detected read will not block */ |
43 | #define EV_WRITE 0x02 |
120 | #define EV_WRITE 0x02L /* ev_io detected write will not block */ |
44 | #define EV_TIMEOUT 0x000100 |
121 | #define EV_IOFDSET 0x80L /* internal use only */ |
45 | #define EV_PERIODIC 0x000200 |
122 | #define EV_TIMEOUT 0x00000100L /* timer timed out */ |
46 | #define EV_SIGNAL 0x000400 |
123 | #define EV_PERIODIC 0x00000200L /* periodic timer timed out */ |
47 | #define EV_IDLE 0x000800 |
124 | #define EV_SIGNAL 0x00000400L /* signal was received */ |
48 | #define EV_CHECK 0x001000 |
125 | #define EV_CHILD 0x00000800L /* child/pid had status change */ |
49 | #define EV_PREPARE 0x002000 |
126 | #define EV_STAT 0x00001000L /* stat data changed */ |
50 | #define EV_CHILD 0x004000 |
127 | #define EV_IDLE 0x00002000L /* event loop is idling */ |
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128 | #define EV_PREPARE 0x00004000L /* event loop about to poll */ |
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129 | #define EV_CHECK 0x00008000L /* event loop finished poll */ |
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130 | #define EV_EMBED 0x00010000L /* embedded event loop needs sweep */ |
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131 | #define EV_FORK 0x00020000L /* event loop resumed in child */ |
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132 | #define EV_ASYNC 0x00040000L /* async intra-loop signal */ |
51 | #define EV_ERROR 0x800000 /* sent when an error occurs */ |
133 | #define EV_ERROR 0x80000000L /* sent when an error occurs */ |
52 | |
134 | |
53 | /* can be used to add custom fields to all watchers */ |
135 | /* can be used to add custom fields to all watchers, while losing binary compatibility */ |
54 | #ifndef EV_COMMON |
136 | #ifndef EV_COMMON |
55 | # define EV_COMMON void *data |
137 | # define EV_COMMON void *data; |
56 | #endif |
138 | #endif |
57 | #ifndef EV_PROTOTYPES |
139 | #ifndef EV_PROTOTYPES |
58 | # define EV_PROTOTYPES 1 |
140 | # define EV_PROTOTYPES 1 |
59 | #endif |
141 | #endif |
60 | |
142 | |
61 | #define EV_VERSION_MAJOR 1 |
143 | #define EV_VERSION_MAJOR 3 |
62 | #define EV_VERSION_MINOR 1 |
144 | #define EV_VERSION_MINOR 0 |
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145 | |
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146 | #ifndef EV_CB_DECLARE |
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147 | # define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents); |
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148 | #endif |
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149 | #ifndef EV_CB_INVOKE |
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150 | # define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents)) |
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151 | #endif |
63 | |
152 | |
64 | /* |
153 | /* |
65 | * struct member types: |
154 | * struct member types: |
66 | * private: you can look at them, but not change them, and they might not mean anything to you. |
155 | * private: you can look at them, but not change them, and they might not mean anything to you. |
67 | * ro: can be read anytime, but only changed when the watcher isn't active |
156 | * ro: can be read anytime, but only changed when the watcher isn't active |
… | |
… | |
70 | |
159 | |
71 | /* shared by all watchers */ |
160 | /* shared by all watchers */ |
72 | #define EV_WATCHER(type) \ |
161 | #define EV_WATCHER(type) \ |
73 | int active; /* private */ \ |
162 | int active; /* private */ \ |
74 | int pending; /* private */ \ |
163 | int pending; /* private */ \ |
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164 | int priority; /* private */ \ |
75 | EV_COMMON; /* rw */ \ |
165 | EV_COMMON /* rw */ \ |
76 | void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ |
166 | EV_CB_DECLARE (type) /* private */ |
77 | |
167 | |
78 | #define EV_WATCHER_LIST(type) \ |
168 | #define EV_WATCHER_LIST(type) \ |
79 | EV_WATCHER (type); \ |
169 | EV_WATCHER (type) \ |
80 | struct type *next /* private */ |
170 | struct ev_watcher_list *next; /* private */ |
81 | |
171 | |
82 | #define EV_WATCHER_TIME(type) \ |
172 | #define EV_WATCHER_TIME(type) \ |
83 | EV_WATCHER (type); \ |
173 | EV_WATCHER (type) \ |
84 | ev_tstamp at /* private */ |
174 | ev_tstamp at; /* private */ |
85 | |
175 | |
86 | /* base class, nothing to see here unless you subclass */ |
176 | /* base class, nothing to see here unless you subclass */ |
87 | struct ev_watcher { |
177 | typedef struct ev_watcher |
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178 | { |
88 | EV_WATCHER (ev_watcher); |
179 | EV_WATCHER (ev_watcher) |
89 | }; |
180 | } ev_watcher; |
90 | |
181 | |
91 | /* base class, nothing to see here unless you subclass */ |
182 | /* base class, nothing to see here unless you subclass */ |
92 | struct ev_watcher_list { |
183 | typedef struct ev_watcher_list |
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184 | { |
93 | EV_WATCHER_LIST (ev_watcher_list); |
185 | EV_WATCHER_LIST (ev_watcher_list) |
94 | }; |
186 | } ev_watcher_list; |
95 | |
187 | |
96 | /* base class, nothing to see here unless you subclass */ |
188 | /* base class, nothing to see here unless you subclass */ |
97 | struct ev_watcher_time { |
189 | typedef struct ev_watcher_time |
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190 | { |
98 | EV_WATCHER_TIME (ev_watcher_time); |
191 | EV_WATCHER_TIME (ev_watcher_time) |
99 | }; |
192 | } ev_watcher_time; |
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193 | |
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194 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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195 | /* revent EV_READ, EV_WRITE */ |
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196 | typedef struct ev_io |
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197 | { |
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198 | EV_WATCHER_LIST (ev_io) |
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199 | |
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200 | int fd; /* ro */ |
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201 | int events; /* ro */ |
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202 | } ev_io; |
100 | |
203 | |
101 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
204 | /* invoked after a specific time, repeatable (based on monotonic clock) */ |
102 | /* revent EV_TIMEOUT */ |
205 | /* revent EV_TIMEOUT */ |
103 | struct ev_timer |
206 | typedef struct ev_timer |
104 | { |
207 | { |
105 | EV_WATCHER_TIME (ev_timer); |
208 | EV_WATCHER_TIME (ev_timer) |
106 | |
209 | |
107 | ev_tstamp repeat; /* rw */ |
210 | ev_tstamp repeat; /* rw */ |
108 | }; |
211 | } ev_timer; |
109 | |
212 | |
110 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
213 | /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ |
111 | /* revent EV_PERIODIC */ |
214 | /* revent EV_PERIODIC */ |
112 | struct ev_periodic |
215 | typedef struct ev_periodic |
113 | { |
216 | { |
114 | EV_WATCHER_TIME (ev_periodic); |
217 | EV_WATCHER_TIME (ev_periodic) |
115 | |
218 | |
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219 | ev_tstamp offset; /* rw */ |
116 | ev_tstamp interval; /* rw */ |
220 | ev_tstamp interval; /* rw */ |
117 | }; |
221 | ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */ |
118 | |
222 | } ev_periodic; |
119 | /* invoked when fd is either EV_READable or EV_WRITEable */ |
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120 | /* revent EV_READ, EV_WRITE */ |
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121 | struct ev_io |
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122 | { |
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123 | EV_WATCHER_LIST (ev_io); |
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124 | |
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125 | int fd; /* ro */ |
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126 | int events; /* ro */ |
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127 | }; |
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128 | |
223 | |
129 | /* invoked when the given signal has been received */ |
224 | /* invoked when the given signal has been received */ |
130 | /* revent EV_SIGNAL */ |
225 | /* revent EV_SIGNAL */ |
131 | struct ev_signal |
226 | typedef struct ev_signal |
132 | { |
227 | { |
133 | EV_WATCHER_LIST (ev_signal); |
228 | EV_WATCHER_LIST (ev_signal) |
134 | |
229 | |
135 | int signum; /* ro */ |
230 | int signum; /* ro */ |
136 | }; |
231 | } ev_signal; |
137 | |
232 | |
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233 | /* invoked when sigchld is received and waitpid indicates the given pid */ |
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234 | /* revent EV_CHILD */ |
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235 | /* does not support priorities */ |
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236 | typedef struct ev_child |
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237 | { |
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238 | EV_WATCHER_LIST (ev_child) |
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239 | |
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240 | int flags; /* private */ |
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241 | int pid; /* ro */ |
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242 | int rpid; /* rw, holds the received pid */ |
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243 | int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */ |
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244 | } ev_child; |
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245 | |
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246 | #if EV_STAT_ENABLE |
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247 | /* st_nlink = 0 means missing file or other error */ |
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248 | # ifdef _WIN32 |
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249 | typedef struct _stati64 ev_statdata; |
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250 | # else |
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251 | typedef struct stat ev_statdata; |
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252 | # endif |
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253 | |
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254 | /* invoked each time the stat data changes for a given path */ |
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255 | /* revent EV_STAT */ |
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256 | typedef struct ev_stat |
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257 | { |
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258 | EV_WATCHER_LIST (ev_stat) |
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259 | |
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260 | ev_timer timer; /* private */ |
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261 | ev_tstamp interval; /* ro */ |
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262 | const char *path; /* ro */ |
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263 | ev_statdata prev; /* ro */ |
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264 | ev_statdata attr; /* ro */ |
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265 | |
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266 | int wd; /* wd for inotify, fd for kqueue */ |
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267 | } ev_stat; |
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268 | #endif |
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269 | |
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270 | #if EV_IDLE_ENABLE |
138 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
271 | /* invoked when the nothing else needs to be done, keeps the process from blocking */ |
139 | /* revent EV_IDLE */ |
272 | /* revent EV_IDLE */ |
140 | struct ev_idle |
273 | typedef struct ev_idle |
141 | { |
274 | { |
142 | EV_WATCHER (ev_idle); |
275 | EV_WATCHER (ev_idle) |
143 | }; |
276 | } ev_idle; |
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277 | #endif |
144 | |
278 | |
145 | /* invoked for each run of the mainloop, just before the blocking call */ |
279 | /* invoked for each run of the mainloop, just before the blocking call */ |
146 | /* you can still change events in any way you like */ |
280 | /* you can still change events in any way you like */ |
147 | /* revent EV_PREPARE */ |
281 | /* revent EV_PREPARE */ |
148 | struct ev_prepare |
282 | typedef struct ev_prepare |
149 | { |
283 | { |
150 | EV_WATCHER (ev_prepare); |
284 | EV_WATCHER (ev_prepare) |
151 | }; |
285 | } ev_prepare; |
152 | |
286 | |
153 | /* invoked for each run of the mainloop, just after the blocking call */ |
287 | /* invoked for each run of the mainloop, just after the blocking call */ |
154 | /* revent EV_CHECK */ |
288 | /* revent EV_CHECK */ |
155 | struct ev_check |
289 | typedef struct ev_check |
156 | { |
290 | { |
157 | EV_WATCHER (ev_check); |
291 | EV_WATCHER (ev_check) |
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292 | } ev_check; |
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293 | |
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294 | #if EV_FORK_ENABLE |
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295 | /* the callback gets invoked before check in the child process when a fork was detected */ |
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296 | typedef struct ev_fork |
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297 | { |
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298 | EV_WATCHER (ev_fork) |
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299 | } ev_fork; |
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300 | #endif |
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301 | |
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302 | #if EV_EMBED_ENABLE |
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303 | /* used to embed an event loop inside another */ |
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304 | /* the callback gets invoked when the event loop has handled events, and can be 0 */ |
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305 | typedef struct ev_embed |
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306 | { |
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307 | EV_WATCHER (ev_embed) |
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308 | |
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309 | struct ev_loop *other; /* ro */ |
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310 | ev_io io; /* private */ |
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311 | ev_prepare prepare; /* private */ |
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312 | ev_check check; /* unused */ |
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313 | ev_timer timer; /* unused */ |
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314 | ev_periodic periodic; /* unused */ |
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315 | ev_idle idle; /* unused */ |
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316 | ev_fork fork; /* unused */ |
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317 | } ev_embed; |
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318 | #endif |
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319 | |
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320 | #if EV_ASYNC_ENABLE |
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321 | /* invoked when somebody calls ev_async_send on the watcher */ |
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322 | /* revent EV_ASYNC */ |
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323 | typedef struct ev_async |
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324 | { |
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325 | EV_WATCHER (ev_async) |
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326 | |
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327 | EV_ATOMIC_T sent; /* private */ |
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328 | } ev_async; |
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329 | |
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330 | # define ev_async_pending(w) (((w)->sent + 0) |
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331 | #endif |
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332 | |
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333 | /* the presence of this union forces similar struct layout */ |
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334 | union ev_any_watcher |
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335 | { |
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336 | struct ev_watcher w; |
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337 | struct ev_watcher_list wl; |
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338 | |
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339 | struct ev_io io; |
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340 | struct ev_timer timer; |
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341 | struct ev_periodic periodic; |
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342 | struct ev_signal signal; |
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343 | struct ev_child child; |
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344 | #if EV_STAT_ENABLE |
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345 | struct ev_stat stat; |
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346 | #endif |
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347 | #if EV_IDLE_ENABLE |
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348 | struct ev_idle idle; |
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349 | #endif |
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350 | struct ev_prepare prepare; |
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351 | struct ev_check check; |
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352 | #if EV_FORK_ENABLE |
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353 | struct ev_fork fork; |
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354 | #endif |
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355 | #if EV_EMBED_ENABLE |
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356 | struct ev_embed embed; |
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357 | #endif |
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358 | #if EV_ASYND_ENABLE |
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359 | struct ev_async async; |
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360 | #endif |
158 | }; |
361 | }; |
159 | |
362 | |
160 | /* invoked when sigchld is received and waitpid indicates the givne pid */ |
363 | /* bits for ev_default_loop and ev_loop_new */ |
161 | /* revent EV_CHILD */ |
364 | /* the default */ |
162 | struct ev_child |
365 | #define EVFLAG_AUTO 0x00000000UL /* not quite a mask */ |
163 | { |
366 | /* flag bits */ |
164 | EV_WATCHER_LIST (ev_child); |
367 | #define EVFLAG_NOENV 0x01000000UL /* do NOT consult environment */ |
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368 | #define EVFLAG_FORKCHECK 0x02000000UL /* check for a fork in each iteration */ |
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369 | /* method bits to be ored together */ |
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370 | #define EVBACKEND_SELECT 0x00000001UL /* about anywhere */ |
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371 | #define EVBACKEND_POLL 0x00000002UL /* !win */ |
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372 | #define EVBACKEND_EPOLL 0x00000004UL /* linux */ |
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373 | #define EVBACKEND_KQUEUE 0x00000008UL /* bsd */ |
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374 | #define EVBACKEND_DEVPOLL 0x00000010UL /* solaris 8 */ /* NYI */ |
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375 | #define EVBACKEND_PORT 0x00000020UL /* solaris 10 */ |
165 | |
376 | |
166 | int pid; /* ro */ |
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167 | int status; /* rw, holds the exit status, use the macros from sys/wait.h */ |
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168 | }; |
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169 | |
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170 | #define EVMETHOD_NONE 0 |
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171 | #define EVMETHOD_SELECT 1 |
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172 | #define EVMETHOD_EPOLL 2 |
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173 | #if EV_PROTOTYPES |
377 | #if EV_PROTOTYPES |
174 | extern int ev_method; |
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175 | int ev_init (int flags); /* returns ev_method */ |
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176 | int ev_version_major (void); |
378 | int ev_version_major (void); |
177 | int ev_version_minor (void); |
379 | int ev_version_minor (void); |
178 | |
380 | |
179 | /* these three calls are suitable for plugging into pthread_atfork */ |
381 | unsigned int ev_supported_backends (void); |
180 | void ev_fork_prepare (void); |
382 | unsigned int ev_recommended_backends (void); |
181 | void ev_fork_parent (void); |
383 | unsigned int ev_embeddable_backends (void); |
182 | void ev_fork_child (void); |
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183 | |
384 | |
184 | extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
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185 | ev_tstamp ev_time (void); |
385 | ev_tstamp ev_time (void); |
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386 | void ev_sleep (ev_tstamp delay); /* sleep for a while */ |
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387 | |
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388 | /* Sets the allocation function to use, works like realloc. |
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389 | * It is used to allocate and free memory. |
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390 | * If it returns zero when memory needs to be allocated, the library might abort |
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391 | * or take some potentially destructive action. |
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392 | * The default is your system realloc function. |
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393 | */ |
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394 | void ev_set_allocator (void *(*cb)(void *ptr, long size)); |
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395 | |
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396 | /* set the callback function to call on a |
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397 | * retryable syscall error |
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398 | * (such as failed select, poll, epoll_wait) |
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399 | */ |
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400 | void ev_set_syserr_cb (void (*cb)(const char *msg)); |
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401 | |
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402 | # if EV_MULTIPLICITY |
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403 | /* the default loop is the only one that handles signals and child watchers */ |
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404 | /* you can call this as often as you like */ |
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405 | static struct ev_loop * |
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406 | ev_default_loop (unsigned int flags) |
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407 | { |
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408 | extern struct ev_loop *ev_default_loop_ptr; |
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409 | extern struct ev_loop *ev_default_loop_init (unsigned int flags); |
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410 | |
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411 | if (!ev_default_loop_ptr) |
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412 | ev_default_loop_init (flags); |
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413 | |
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414 | return ev_default_loop_ptr; |
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415 | } |
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416 | |
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417 | /* create and destroy alternative loops that don't handle signals */ |
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418 | struct ev_loop *ev_loop_new (unsigned int flags); |
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419 | void ev_loop_destroy (EV_P); |
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420 | void ev_loop_fork (EV_P); |
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421 | |
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422 | ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */ |
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423 | |
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424 | # else |
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425 | |
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426 | int ev_default_loop (unsigned int flags); /* returns true when successful */ |
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427 | |
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428 | static ev_tstamp |
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429 | ev_now (void) |
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430 | { |
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431 | extern ev_tstamp ev_rt_now; |
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432 | |
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433 | return ev_rt_now; |
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434 | } |
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435 | # endif |
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436 | |
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437 | static int |
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438 | ev_is_default_loop (EV_P) |
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439 | { |
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440 | #if EV_MULTIPLICITY |
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441 | extern struct ev_loop *ev_default_loop_ptr; |
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442 | |
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443 | return !!(EV_A == ev_default_loop_ptr); |
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444 | #else |
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445 | return 1; |
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446 | #endif |
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447 | } |
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448 | |
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449 | void ev_default_destroy (void); /* destroy the default loop */ |
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450 | /* this needs to be called after fork, to duplicate the default loop */ |
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451 | /* if you create alternative loops you have to call ev_loop_fork on them */ |
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452 | /* you can call it in either the parent or the child */ |
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453 | /* you can actually call it at any time, anywhere :) */ |
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454 | void ev_default_fork (void); |
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455 | |
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456 | unsigned int ev_backend (EV_P); /* backend in use by loop */ |
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457 | unsigned int ev_loop_count (EV_P); /* number of loop iterations */ |
186 | #endif |
458 | #endif |
187 | |
459 | |
188 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
460 | #define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
189 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
461 | #define EVLOOP_ONESHOT 2 /* block *once* only */ |
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462 | #define EVUNLOOP_CANCEL 0 /* undo unloop */ |
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463 | #define EVUNLOOP_ONE 1 /* unloop once */ |
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464 | #define EVUNLOOP_ALL 2 /* unloop all loops */ |
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465 | |
190 | #if EV_PROTOTYPES |
466 | #if EV_PROTOTYPES |
191 | void ev_loop (int flags); |
467 | void ev_loop (EV_P_ int flags); |
192 | extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ |
468 | 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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469 | |
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470 | void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ |
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471 | void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */ |
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472 | |
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473 | /* |
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474 | * ref/unref can be used to add or remove a refcount on the mainloop. every watcher |
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475 | * keeps one reference. if you have a long-runing watcher you never unregister that |
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476 | * should not keep ev_loop from running, unref() after starting, and ref() before stopping. |
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477 | */ |
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478 | void ev_ref (EV_P); |
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479 | void ev_unref (EV_P); |
193 | |
480 | |
194 | /* convinience function, wait for a single event, without registering an event watcher */ |
481 | /* convinience function, wait for a single event, without registering an event watcher */ |
195 | /* if timeout is < 0, do wait indefinitely */ |
482 | /* if timeout is < 0, do wait indefinitely */ |
196 | void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
483 | void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); |
197 | #endif |
484 | #endif |
198 | |
485 | |
199 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
486 | /* these may evaluate ev multiple times, and the other arguments at most once */ |
200 | /* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
487 | /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ |
201 | #define ev_watcher_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) |
488 | #define ev_init(ev,cb_) do { \ |
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489 | ((ev_watcher *)(void *)(ev))->active = \ |
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490 | ((ev_watcher *)(void *)(ev))->pending = \ |
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491 | ((ev_watcher *)(void *)(ev))->priority = 0; \ |
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492 | ev_set_cb ((ev), cb_); \ |
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493 | } while (0) |
202 | |
494 | |
203 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
495 | #define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_) | EV_IOFDSET; } while (0) |
204 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
496 | #define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) |
205 | #define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) |
497 | #define ev_periodic_set(ev,ofs_,ival_,res_) do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0) |
206 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
498 | #define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
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499 | #define ev_child_set(ev,pid_,trace_) do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0) |
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500 | #define ev_stat_set(ev,path_,interval_) do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0) |
207 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
501 | #define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ |
208 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
502 | #define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ |
209 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
503 | #define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ |
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504 | #define ev_embed_set(ev,other_) do { (ev)->other = (other_); } while (0) |
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505 | #define ev_fork_set(ev) /* nop, yes, this is a serious in-joke */ |
210 | #define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) |
506 | #define ev_async_set(ev) do { (ev)->sent = 0; } while (0) |
211 | |
507 | |
212 | #define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
508 | #define ev_io_init(ev,cb,fd,events) do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) |
213 | #define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
509 | #define ev_timer_init(ev,cb,after,repeat) do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) |
214 | #define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) |
510 | #define ev_periodic_init(ev,cb,at,ival,res) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0) |
215 | #define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
511 | #define ev_signal_init(ev,cb,signum) do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) |
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512 | #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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513 | #define ev_stat_init(ev,cb,path,interval) do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0) |
216 | #define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
514 | #define ev_idle_init(ev,cb) do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) |
217 | #define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
515 | #define ev_prepare_init(ev,cb) do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) |
218 | #define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
516 | #define ev_check_init(ev,cb) do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0) |
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517 | #define ev_embed_init(ev,cb,other) do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0) |
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518 | #define ev_fork_init(ev,cb) do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0) |
219 | #define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) |
519 | #define ev_async_init(ev,cb) do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0) |
220 | |
520 | |
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521 | #define ev_is_pending(ev) (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */ |
221 | #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
522 | #define ev_is_active(ev) (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */ |
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523 | |
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524 | #define ev_priority(ev) ((((ev_watcher *)(void *)(ev))->priority) + 0) |
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525 | #define ev_cb(ev) (ev)->cb /* rw */ |
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526 | #define ev_set_priority(ev,pri) ((ev_watcher *)(void *)(ev))->priority = (pri) |
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527 | |
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528 | #ifndef ev_set_cb |
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529 | # define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_) |
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530 | #endif |
222 | |
531 | |
223 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
532 | /* stopping (enabling, adding) a watcher does nothing if it is already running */ |
224 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
533 | /* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
225 | #if EV_PROTOTYPES |
534 | #if EV_PROTOTYPES |
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535 | |
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536 | /* feeds an event into a watcher as if the event actually occured */ |
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537 | /* accepts any ev_watcher type */ |
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538 | void ev_feed_event (EV_P_ void *w, int revents); |
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539 | void ev_feed_fd_event (EV_P_ int fd, int revents); |
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540 | void ev_feed_signal_event (EV_P_ int signum); |
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541 | void ev_invoke (EV_P_ void *w, int revents); |
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542 | int ev_clear_pending (EV_P_ void *w); |
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543 | |
226 | void ev_io_start (struct ev_io *w); |
544 | void ev_io_start (EV_P_ ev_io *w); |
227 | void ev_io_stop (struct ev_io *w); |
545 | void ev_io_stop (EV_P_ ev_io *w); |
228 | |
546 | |
229 | void ev_timer_start (struct ev_timer *w); |
547 | void ev_timer_start (EV_P_ ev_timer *w); |
230 | void ev_timer_stop (struct ev_timer *w); |
548 | void ev_timer_stop (EV_P_ ev_timer *w); |
231 | void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
549 | /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ |
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550 | void ev_timer_again (EV_P_ ev_timer *w); |
232 | |
551 | |
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552 | #if EV_PERIODIC_ENABLE |
233 | void ev_periodic_start (struct ev_periodic *w); |
553 | void ev_periodic_start (EV_P_ ev_periodic *w); |
234 | void ev_periodic_stop (struct ev_periodic *w); |
554 | void ev_periodic_stop (EV_P_ ev_periodic *w); |
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555 | void ev_periodic_again (EV_P_ ev_periodic *w); |
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556 | #endif |
235 | |
557 | |
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558 | /* only supported in the default loop */ |
236 | void ev_signal_start (struct ev_signal *w); |
559 | void ev_signal_start (EV_P_ ev_signal *w); |
237 | void ev_signal_stop (struct ev_signal *w); |
560 | void ev_signal_stop (EV_P_ ev_signal *w); |
238 | |
561 | |
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562 | /* only supported in the default loop */ |
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563 | void ev_child_start (EV_P_ ev_child *w); |
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564 | void ev_child_stop (EV_P_ ev_child *w); |
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565 | |
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566 | # if EV_STAT_ENABLE |
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567 | void ev_stat_start (EV_P_ ev_stat *w); |
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568 | void ev_stat_stop (EV_P_ ev_stat *w); |
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569 | void ev_stat_stat (EV_P_ ev_stat *w); |
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570 | # endif |
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571 | |
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572 | # if EV_IDLE_ENABLE |
239 | void ev_idle_start (struct ev_idle *w); |
573 | void ev_idle_start (EV_P_ ev_idle *w); |
240 | void ev_idle_stop (struct ev_idle *w); |
574 | void ev_idle_stop (EV_P_ ev_idle *w); |
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575 | # endif |
241 | |
576 | |
242 | void ev_prepare_start (struct ev_prepare *w); |
577 | void ev_prepare_start (EV_P_ ev_prepare *w); |
243 | void ev_prepare_stop (struct ev_prepare *w); |
578 | void ev_prepare_stop (EV_P_ ev_prepare *w); |
244 | |
579 | |
245 | void ev_check_start (struct ev_check *w); |
580 | void ev_check_start (EV_P_ ev_check *w); |
246 | void ev_check_stop (struct ev_check *w); |
581 | void ev_check_stop (EV_P_ ev_check *w); |
247 | |
582 | |
248 | void ev_child_start (struct ev_child *w); |
583 | # if EV_FORK_ENABLE |
249 | void ev_child_stop (struct ev_child *w); |
584 | void ev_fork_start (EV_P_ ev_fork *w); |
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585 | void ev_fork_stop (EV_P_ ev_fork *w); |
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586 | # endif |
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587 | |
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588 | # if EV_EMBED_ENABLE |
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589 | /* only supported when loop to be embedded is in fact embeddable */ |
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590 | void ev_embed_start (EV_P_ ev_embed *w); |
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591 | void ev_embed_stop (EV_P_ ev_embed *w); |
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592 | void ev_embed_sweep (EV_P_ ev_embed *w); |
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593 | # endif |
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594 | |
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595 | # if EV_ASYNC_ENABLE |
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596 | void ev_async_start (EV_P_ ev_async *w); |
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597 | void ev_async_stop (EV_P_ ev_async *w); |
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598 | void ev_async_send (EV_P_ ev_async *w); |
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599 | # endif |
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600 | |
250 | #endif |
601 | #endif |
251 | |
602 | |
252 | #ifdef __cplusplus |
603 | #ifdef __cplusplus |
253 | } |
604 | } |
254 | #endif |
605 | #endif |