1 | /* |
1 | /* |
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2 | * libev event processing core, watcher management |
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3 | * |
2 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007 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 |
6 | * modification, are permitted provided that the following conditions are |
8 | * modification, are permitted provided that the following conditions are |
… | |
… | |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
30 | */ |
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31 | #ifndef EV_STANDALONE |
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32 | # include "config.h" |
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33 | #endif |
29 | |
34 | |
30 | #include <math.h> |
35 | #include <math.h> |
31 | #include <stdlib.h> |
36 | #include <stdlib.h> |
32 | #include <unistd.h> |
37 | #include <unistd.h> |
33 | #include <fcntl.h> |
38 | #include <fcntl.h> |
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37 | #include <stdio.h> |
42 | #include <stdio.h> |
38 | |
43 | |
39 | #include <assert.h> |
44 | #include <assert.h> |
40 | #include <errno.h> |
45 | #include <errno.h> |
41 | #include <sys/types.h> |
46 | #include <sys/types.h> |
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47 | #ifndef WIN32 |
42 | #include <sys/wait.h> |
48 | # include <sys/wait.h> |
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49 | #endif |
43 | #include <sys/time.h> |
50 | #include <sys/time.h> |
44 | #include <time.h> |
51 | #include <time.h> |
45 | |
52 | |
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53 | /**/ |
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54 | |
46 | #ifndef HAVE_MONOTONIC |
55 | #ifndef EV_USE_MONOTONIC |
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56 | # define EV_USE_MONOTONIC 1 |
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57 | #endif |
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58 | |
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59 | #ifndef EV_USE_SELECT |
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60 | # define EV_USE_SELECT 1 |
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61 | #endif |
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62 | |
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63 | #ifndef EV_USEV_POLL |
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64 | # define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */ |
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65 | #endif |
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66 | |
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67 | #ifndef EV_USE_EPOLL |
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68 | # define EV_USE_EPOLL 0 |
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69 | #endif |
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70 | |
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71 | #ifndef EV_USE_KQUEUE |
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72 | # define EV_USE_KQUEUE 0 |
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73 | #endif |
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74 | |
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75 | #ifndef EV_USE_REALTIME |
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76 | # define EV_USE_REALTIME 1 |
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77 | #endif |
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78 | |
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79 | /**/ |
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80 | |
47 | # ifdef CLOCK_MONOTONIC |
81 | #ifndef CLOCK_MONOTONIC |
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82 | # undef EV_USE_MONOTONIC |
48 | # define HAVE_MONOTONIC 1 |
83 | # define EV_USE_MONOTONIC 0 |
49 | # endif |
84 | #endif |
50 | #endif |
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51 | |
85 | |
52 | #ifndef HAVE_SELECT |
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53 | # define HAVE_SELECT 1 |
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54 | #endif |
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55 | |
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56 | #ifndef HAVE_EPOLL |
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57 | # define HAVE_EPOLL 0 |
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58 | #endif |
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59 | |
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60 | #ifndef HAVE_REALTIME |
86 | #ifndef CLOCK_REALTIME |
61 | # define HAVE_REALTIME 1 /* posix requirement, but might be slower */ |
87 | # undef EV_USE_REALTIME |
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88 | # define EV_USE_REALTIME 0 |
62 | #endif |
89 | #endif |
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90 | |
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91 | /**/ |
63 | |
92 | |
64 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
93 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
65 | #define MAX_BLOCKTIME 60. |
94 | #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ |
66 | #define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ |
95 | #define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */ |
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96 | /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ |
67 | |
97 | |
68 | #include "ev.h" |
98 | #include "ev.h" |
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99 | |
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100 | #if __GNUC__ >= 3 |
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101 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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102 | # define inline inline |
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103 | #else |
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104 | # define expect(expr,value) (expr) |
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105 | # define inline static |
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106 | #endif |
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107 | |
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108 | #define expect_false(expr) expect ((expr) != 0, 0) |
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109 | #define expect_true(expr) expect ((expr) != 0, 1) |
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110 | |
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111 | #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
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112 | #define ABSPRI(w) ((w)->priority - EV_MINPRI) |
69 | |
113 | |
70 | typedef struct ev_watcher *W; |
114 | typedef struct ev_watcher *W; |
71 | typedef struct ev_watcher_list *WL; |
115 | typedef struct ev_watcher_list *WL; |
72 | typedef struct ev_watcher_time *WT; |
116 | typedef struct ev_watcher_time *WT; |
73 | |
117 | |
74 | static ev_tstamp now, diff; /* monotonic clock */ |
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75 | ev_tstamp ev_now; |
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76 | int ev_method; |
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77 | |
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78 | static int have_monotonic; /* runtime */ |
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79 | |
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80 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
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81 | static void (*method_modify)(int fd, int oev, int nev); |
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82 | static void (*method_poll)(ev_tstamp timeout); |
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83 | |
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84 | /*****************************************************************************/ |
118 | /*****************************************************************************/ |
85 | |
119 | |
86 | ev_tstamp |
120 | typedef struct |
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121 | { |
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122 | struct ev_watcher_list *head; |
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123 | unsigned char events; |
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124 | unsigned char reify; |
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125 | } ANFD; |
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126 | |
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127 | typedef struct |
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128 | { |
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129 | W w; |
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130 | int events; |
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131 | } ANPENDING; |
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132 | |
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133 | #ifdef EV_MULTIPLICITY |
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134 | struct ev_loop |
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135 | { |
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136 | # define VAR(name,decl) decl |
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137 | # include "ev_vars.h" |
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138 | }; |
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139 | #else |
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140 | # define VAR(name,decl) static decl |
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141 | # include "ev_vars.h" |
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142 | #endif |
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143 | #undef VAR |
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144 | |
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145 | /*****************************************************************************/ |
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146 | |
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147 | inline ev_tstamp |
87 | ev_time (void) |
148 | ev_time (void) |
88 | { |
149 | { |
89 | #if HAVE_REALTIME |
150 | #if EV_USE_REALTIME |
90 | struct timespec ts; |
151 | struct timespec ts; |
91 | clock_gettime (CLOCK_REALTIME, &ts); |
152 | clock_gettime (CLOCK_REALTIME, &ts); |
92 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
153 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
93 | #else |
154 | #else |
94 | struct timeval tv; |
155 | struct timeval tv; |
95 | gettimeofday (&tv, 0); |
156 | gettimeofday (&tv, 0); |
96 | return tv.tv_sec + tv.tv_usec * 1e-6; |
157 | return tv.tv_sec + tv.tv_usec * 1e-6; |
97 | #endif |
158 | #endif |
98 | } |
159 | } |
99 | |
160 | |
100 | static ev_tstamp |
161 | inline ev_tstamp |
101 | get_clock (void) |
162 | get_clock (void) |
102 | { |
163 | { |
103 | #if HAVE_MONOTONIC |
164 | #if EV_USE_MONOTONIC |
104 | if (have_monotonic) |
165 | if (expect_true (have_monotonic)) |
105 | { |
166 | { |
106 | struct timespec ts; |
167 | struct timespec ts; |
107 | clock_gettime (CLOCK_MONOTONIC, &ts); |
168 | clock_gettime (CLOCK_MONOTONIC, &ts); |
108 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
169 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
109 | } |
170 | } |
110 | #endif |
171 | #endif |
111 | |
172 | |
112 | return ev_time (); |
173 | return ev_time (); |
113 | } |
174 | } |
114 | |
175 | |
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176 | ev_tstamp |
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177 | ev_now (EV_P) |
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178 | { |
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179 | return rt_now; |
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180 | } |
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181 | |
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182 | #define array_roundsize(base,n) ((n) | 4 & ~3) |
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183 | |
115 | #define array_needsize(base,cur,cnt,init) \ |
184 | #define array_needsize(base,cur,cnt,init) \ |
116 | if ((cnt) > cur) \ |
185 | if (expect_false ((cnt) > cur)) \ |
117 | { \ |
186 | { \ |
118 | int newcnt = cur; \ |
187 | int newcnt = cur; \ |
119 | do \ |
188 | do \ |
120 | { \ |
189 | { \ |
121 | newcnt = (newcnt << 1) | 4 & ~3; \ |
190 | newcnt = array_roundsize (base, newcnt << 1); \ |
122 | } \ |
191 | } \ |
123 | while ((cnt) > newcnt); \ |
192 | while ((cnt) > newcnt); \ |
124 | \ |
193 | \ |
125 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
194 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
126 | init (base + cur, newcnt - cur); \ |
195 | init (base + cur, newcnt - cur); \ |
127 | cur = newcnt; \ |
196 | cur = newcnt; \ |
128 | } |
197 | } |
129 | |
198 | |
130 | /*****************************************************************************/ |
199 | /*****************************************************************************/ |
131 | |
200 | |
132 | typedef struct |
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133 | { |
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134 | struct ev_io *head; |
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135 | int events; |
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136 | } ANFD; |
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137 | |
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138 | static ANFD *anfds; |
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139 | static int anfdmax; |
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140 | |
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141 | static void |
201 | static void |
142 | anfds_init (ANFD *base, int count) |
202 | anfds_init (ANFD *base, int count) |
143 | { |
203 | { |
144 | while (count--) |
204 | while (count--) |
145 | { |
205 | { |
146 | base->head = 0; |
206 | base->head = 0; |
147 | base->events = EV_NONE; |
207 | base->events = EV_NONE; |
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208 | base->reify = 0; |
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209 | |
148 | ++base; |
210 | ++base; |
149 | } |
211 | } |
150 | } |
212 | } |
151 | |
213 | |
152 | typedef struct |
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153 | { |
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154 | W w; |
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155 | int events; |
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156 | } ANPENDING; |
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157 | |
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158 | static ANPENDING *pendings; |
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159 | static int pendingmax, pendingcnt; |
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160 | |
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161 | static void |
214 | static void |
162 | event (W w, int events) |
215 | event (EV_P_ W w, int events) |
163 | { |
216 | { |
164 | if (w->active) |
217 | if (w->pending) |
165 | { |
218 | { |
166 | w->pending = ++pendingcnt; |
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167 | array_needsize (pendings, pendingmax, pendingcnt, ); |
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168 | pendings [pendingcnt - 1].w = w; |
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169 | pendings [pendingcnt - 1].events = events; |
219 | pendings [ABSPRI (w)][w->pending - 1].events |= events; |
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220 | return; |
170 | } |
221 | } |
171 | } |
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172 | |
222 | |
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223 | w->pending = ++pendingcnt [ABSPRI (w)]; |
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224 | array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], ); |
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225 | pendings [ABSPRI (w)][w->pending - 1].w = w; |
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226 | pendings [ABSPRI (w)][w->pending - 1].events = events; |
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227 | } |
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228 | |
173 | static void |
229 | static void |
174 | queue_events (W *events, int eventcnt, int type) |
230 | queue_events (EV_P_ W *events, int eventcnt, int type) |
175 | { |
231 | { |
176 | int i; |
232 | int i; |
177 | |
233 | |
178 | for (i = 0; i < eventcnt; ++i) |
234 | for (i = 0; i < eventcnt; ++i) |
179 | event (events [i], type); |
235 | event (EV_A_ events [i], type); |
180 | } |
236 | } |
181 | |
237 | |
182 | static void |
238 | static void |
183 | fd_event (int fd, int events) |
239 | fd_event (EV_P_ int fd, int events) |
184 | { |
240 | { |
185 | ANFD *anfd = anfds + fd; |
241 | ANFD *anfd = anfds + fd; |
186 | struct ev_io *w; |
242 | struct ev_io *w; |
187 | |
243 | |
188 | for (w = anfd->head; w; w = w->next) |
244 | for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
189 | { |
245 | { |
190 | int ev = w->events & events; |
246 | int ev = w->events & events; |
191 | |
247 | |
192 | if (ev) |
248 | if (ev) |
193 | event ((W)w, ev); |
249 | event (EV_A_ (W)w, ev); |
194 | } |
250 | } |
195 | } |
251 | } |
196 | |
252 | |
197 | /*****************************************************************************/ |
253 | /*****************************************************************************/ |
198 | |
254 | |
199 | static int *fdchanges; |
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200 | static int fdchangemax, fdchangecnt; |
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201 | |
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202 | static void |
255 | static void |
203 | fd_reify (void) |
256 | fd_reify (EV_P) |
204 | { |
257 | { |
205 | int i; |
258 | int i; |
206 | |
259 | |
207 | for (i = 0; i < fdchangecnt; ++i) |
260 | for (i = 0; i < fdchangecnt; ++i) |
208 | { |
261 | { |
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210 | ANFD *anfd = anfds + fd; |
263 | ANFD *anfd = anfds + fd; |
211 | struct ev_io *w; |
264 | struct ev_io *w; |
212 | |
265 | |
213 | int events = 0; |
266 | int events = 0; |
214 | |
267 | |
215 | for (w = anfd->head; w; w = w->next) |
268 | for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) |
216 | events |= w->events; |
269 | events |= w->events; |
217 | |
270 | |
218 | anfd->events &= ~EV_REIFY; |
271 | anfd->reify = 0; |
219 | |
272 | |
220 | if (anfd->events != events) |
273 | if (anfd->events != events) |
221 | { |
274 | { |
222 | method_modify (fd, anfd->events, events); |
275 | method_modify (EV_A_ fd, anfd->events, events); |
223 | anfd->events = events; |
276 | anfd->events = events; |
224 | } |
277 | } |
225 | } |
278 | } |
226 | |
279 | |
227 | fdchangecnt = 0; |
280 | fdchangecnt = 0; |
228 | } |
281 | } |
229 | |
282 | |
230 | static void |
283 | static void |
231 | fd_change (int fd) |
284 | fd_change (EV_P_ int fd) |
232 | { |
285 | { |
233 | if (anfds [fd].events & EV_REIFY) |
286 | if (anfds [fd].reify || fdchangecnt < 0) |
234 | return; |
287 | return; |
235 | |
288 | |
236 | anfds [fd].events |= EV_REIFY; |
289 | anfds [fd].reify = 1; |
237 | |
290 | |
238 | ++fdchangecnt; |
291 | ++fdchangecnt; |
239 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
292 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
240 | fdchanges [fdchangecnt - 1] = fd; |
293 | fdchanges [fdchangecnt - 1] = fd; |
241 | } |
294 | } |
242 | |
295 | |
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296 | static void |
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297 | fd_kill (EV_P_ int fd) |
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298 | { |
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299 | struct ev_io *w; |
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300 | |
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301 | while ((w = (struct ev_io *)anfds [fd].head)) |
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302 | { |
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303 | ev_io_stop (EV_A_ w); |
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304 | event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
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305 | } |
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306 | } |
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307 | |
243 | /* called on EBADF to verify fds */ |
308 | /* called on EBADF to verify fds */ |
244 | static void |
309 | static void |
245 | fd_recheck (void) |
310 | fd_ebadf (EV_P) |
246 | { |
311 | { |
247 | int fd; |
312 | int fd; |
248 | |
313 | |
249 | for (fd = 0; fd < anfdmax; ++fd) |
314 | for (fd = 0; fd < anfdmax; ++fd) |
250 | if (anfds [fd].events) |
315 | if (anfds [fd].events) |
251 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
316 | if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) |
252 | while (anfds [fd].head) |
317 | fd_kill (EV_A_ fd); |
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318 | } |
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319 | |
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320 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
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321 | static void |
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322 | fd_enomem (EV_P) |
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323 | { |
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324 | int fd = anfdmax; |
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325 | |
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326 | while (fd--) |
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327 | if (anfds [fd].events) |
253 | { |
328 | { |
254 | event ((W)anfds [fd].head, EV_ERROR); |
329 | close (fd); |
255 | ev_io_stop (anfds [fd].head); |
330 | fd_kill (EV_A_ fd); |
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331 | return; |
256 | } |
332 | } |
257 | } |
333 | } |
258 | |
334 | |
259 | /*****************************************************************************/ |
335 | /*****************************************************************************/ |
260 | |
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261 | static struct ev_timer **timers; |
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262 | static int timermax, timercnt; |
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263 | |
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264 | static struct ev_periodic **periodics; |
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265 | static int periodicmax, periodiccnt; |
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266 | |
336 | |
267 | static void |
337 | static void |
268 | upheap (WT *timers, int k) |
338 | upheap (WT *timers, int k) |
269 | { |
339 | { |
270 | WT w = timers [k]; |
340 | WT w = timers [k]; |
… | |
… | |
307 | |
377 | |
308 | /*****************************************************************************/ |
378 | /*****************************************************************************/ |
309 | |
379 | |
310 | typedef struct |
380 | typedef struct |
311 | { |
381 | { |
312 | struct ev_signal *head; |
382 | struct ev_watcher_list *head; |
313 | sig_atomic_t gotsig; |
383 | sig_atomic_t volatile gotsig; |
314 | } ANSIG; |
384 | } ANSIG; |
315 | |
385 | |
316 | static ANSIG *signals; |
386 | static ANSIG *signals; |
317 | static int signalmax; |
387 | static int signalmax; |
318 | |
388 | |
319 | static int sigpipe [2]; |
389 | static int sigpipe [2]; |
320 | static sig_atomic_t gotsig; |
390 | static sig_atomic_t volatile gotsig; |
321 | static struct ev_io sigev; |
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322 | |
391 | |
323 | static void |
392 | static void |
324 | signals_init (ANSIG *base, int count) |
393 | signals_init (ANSIG *base, int count) |
325 | { |
394 | { |
326 | while (count--) |
395 | while (count--) |
327 | { |
396 | { |
328 | base->head = 0; |
397 | base->head = 0; |
329 | base->gotsig = 0; |
398 | base->gotsig = 0; |
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399 | |
330 | ++base; |
400 | ++base; |
331 | } |
401 | } |
332 | } |
402 | } |
333 | |
403 | |
334 | static void |
404 | static void |
… | |
… | |
336 | { |
406 | { |
337 | signals [signum - 1].gotsig = 1; |
407 | signals [signum - 1].gotsig = 1; |
338 | |
408 | |
339 | if (!gotsig) |
409 | if (!gotsig) |
340 | { |
410 | { |
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411 | int old_errno = errno; |
341 | gotsig = 1; |
412 | gotsig = 1; |
342 | write (sigpipe [1], &gotsig, 1); |
413 | write (sigpipe [1], &signum, 1); |
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414 | errno = old_errno; |
343 | } |
415 | } |
344 | } |
416 | } |
345 | |
417 | |
346 | static void |
418 | static void |
347 | sigcb (struct ev_io *iow, int revents) |
419 | sigcb (EV_P_ struct ev_io *iow, int revents) |
348 | { |
420 | { |
349 | struct ev_signal *w; |
421 | struct ev_watcher_list *w; |
350 | int sig; |
422 | int signum; |
351 | |
423 | |
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424 | read (sigpipe [0], &revents, 1); |
352 | gotsig = 0; |
425 | gotsig = 0; |
353 | read (sigpipe [0], &revents, 1); |
|
|
354 | |
426 | |
355 | for (sig = signalmax; sig--; ) |
427 | for (signum = signalmax; signum--; ) |
356 | if (signals [sig].gotsig) |
428 | if (signals [signum].gotsig) |
357 | { |
429 | { |
358 | signals [sig].gotsig = 0; |
430 | signals [signum].gotsig = 0; |
359 | |
431 | |
360 | for (w = signals [sig].head; w; w = w->next) |
432 | for (w = signals [signum].head; w; w = w->next) |
361 | event ((W)w, EV_SIGNAL); |
433 | event (EV_A_ (W)w, EV_SIGNAL); |
362 | } |
434 | } |
363 | } |
435 | } |
364 | |
436 | |
365 | static void |
437 | static void |
366 | siginit (void) |
438 | siginit (EV_P) |
367 | { |
439 | { |
|
|
440 | #ifndef WIN32 |
368 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
441 | fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); |
369 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
442 | fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); |
370 | |
443 | |
371 | /* rather than sort out wether we really need nb, set it */ |
444 | /* rather than sort out wether we really need nb, set it */ |
372 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
445 | fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); |
373 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
446 | fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); |
|
|
447 | #endif |
374 | |
448 | |
375 | ev_io_set (&sigev, sigpipe [0], EV_READ); |
449 | ev_io_set (&sigev, sigpipe [0], EV_READ); |
376 | ev_io_start (&sigev); |
450 | ev_io_start (&sigev); |
|
|
451 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
377 | } |
452 | } |
378 | |
453 | |
379 | /*****************************************************************************/ |
454 | /*****************************************************************************/ |
380 | |
455 | |
381 | static struct ev_idle **idles; |
456 | #ifndef WIN32 |
382 | static int idlemax, idlecnt; |
|
|
383 | |
|
|
384 | static struct ev_prepare **prepares; |
|
|
385 | static int preparemax, preparecnt; |
|
|
386 | |
|
|
387 | static struct ev_check **checks; |
|
|
388 | static int checkmax, checkcnt; |
|
|
389 | |
|
|
390 | /*****************************************************************************/ |
|
|
391 | |
|
|
392 | static struct ev_child *childs [PID_HASHSIZE]; |
|
|
393 | static struct ev_signal childev; |
|
|
394 | |
457 | |
395 | #ifndef WCONTINUED |
458 | #ifndef WCONTINUED |
396 | # define WCONTINUED 0 |
459 | # define WCONTINUED 0 |
397 | #endif |
460 | #endif |
398 | |
461 | |
399 | static void |
462 | static void |
400 | childcb (struct ev_signal *sw, int revents) |
463 | child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status) |
401 | { |
464 | { |
402 | struct ev_child *w; |
465 | struct ev_child *w; |
|
|
466 | |
|
|
467 | for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next) |
|
|
468 | if (w->pid == pid || !w->pid) |
|
|
469 | { |
|
|
470 | w->priority = sw->priority; /* need to do it *now* */ |
|
|
471 | w->rpid = pid; |
|
|
472 | w->rstatus = status; |
|
|
473 | event (EV_A_ (W)w, EV_CHILD); |
|
|
474 | } |
|
|
475 | } |
|
|
476 | |
|
|
477 | static void |
|
|
478 | childcb (EV_P_ struct ev_signal *sw, int revents) |
|
|
479 | { |
403 | int pid, status; |
480 | int pid, status; |
404 | |
481 | |
405 | while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) |
482 | if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
406 | for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) |
483 | { |
407 | if (w->pid == pid || w->pid == -1) |
484 | /* make sure we are called again until all childs have been reaped */ |
408 | { |
485 | event (EV_A_ (W)sw, EV_SIGNAL); |
409 | w->status = status; |
486 | |
410 | event ((W)w, EV_CHILD); |
487 | child_reap (EV_A_ sw, pid, pid, status); |
411 | } |
488 | child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ |
|
|
489 | } |
412 | } |
490 | } |
|
|
491 | |
|
|
492 | #endif |
413 | |
493 | |
414 | /*****************************************************************************/ |
494 | /*****************************************************************************/ |
415 | |
495 | |
|
|
496 | #if EV_USE_KQUEUE |
|
|
497 | # include "ev_kqueue.c" |
|
|
498 | #endif |
416 | #if HAVE_EPOLL |
499 | #if EV_USE_EPOLL |
417 | # include "ev_epoll.c" |
500 | # include "ev_epoll.c" |
418 | #endif |
501 | #endif |
|
|
502 | #if EV_USEV_POLL |
|
|
503 | # include "ev_poll.c" |
|
|
504 | #endif |
419 | #if HAVE_SELECT |
505 | #if EV_USE_SELECT |
420 | # include "ev_select.c" |
506 | # include "ev_select.c" |
421 | #endif |
507 | #endif |
422 | |
508 | |
423 | int |
509 | int |
424 | ev_version_major (void) |
510 | ev_version_major (void) |
… | |
… | |
430 | ev_version_minor (void) |
516 | ev_version_minor (void) |
431 | { |
517 | { |
432 | return EV_VERSION_MINOR; |
518 | return EV_VERSION_MINOR; |
433 | } |
519 | } |
434 | |
520 | |
435 | int ev_init (int flags) |
521 | /* return true if we are running with elevated privileges and should ignore env variables */ |
|
|
522 | static int |
|
|
523 | enable_secure (void) |
436 | { |
524 | { |
|
|
525 | #ifdef WIN32 |
|
|
526 | return 0; |
|
|
527 | #else |
|
|
528 | return getuid () != geteuid () |
|
|
529 | || getgid () != getegid (); |
|
|
530 | #endif |
|
|
531 | } |
|
|
532 | |
|
|
533 | int |
|
|
534 | ev_method (EV_P) |
|
|
535 | { |
|
|
536 | return method; |
|
|
537 | } |
|
|
538 | |
|
|
539 | int |
|
|
540 | ev_init (EV_P_ int methods) |
|
|
541 | { |
|
|
542 | #ifdef EV_MULTIPLICITY |
|
|
543 | memset (loop, 0, sizeof (struct ev_loop)); |
|
|
544 | #endif |
|
|
545 | |
437 | if (!ev_method) |
546 | if (!method) |
438 | { |
547 | { |
439 | #if HAVE_MONOTONIC |
548 | #if EV_USE_MONOTONIC |
440 | { |
549 | { |
441 | struct timespec ts; |
550 | struct timespec ts; |
442 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
551 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
443 | have_monotonic = 1; |
552 | have_monotonic = 1; |
444 | } |
553 | } |
445 | #endif |
554 | #endif |
446 | |
555 | |
447 | ev_now = ev_time (); |
556 | rt_now = ev_time (); |
448 | now = get_clock (); |
557 | mn_now = get_clock (); |
|
|
558 | now_floor = mn_now; |
449 | diff = ev_now - now; |
559 | diff = rt_now - mn_now; |
450 | |
560 | |
451 | if (pipe (sigpipe)) |
561 | if (pipe (sigpipe)) |
452 | return 0; |
562 | return 0; |
453 | |
563 | |
|
|
564 | if (methods == EVMETHOD_AUTO) |
|
|
565 | if (!enable_secure () && getenv ("LIBmethodS")) |
|
|
566 | methods = atoi (getenv ("LIBmethodS")); |
|
|
567 | else |
454 | ev_method = EVMETHOD_NONE; |
568 | methods = EVMETHOD_ANY; |
|
|
569 | |
|
|
570 | method = 0; |
|
|
571 | #if EV_USE_KQUEUE |
|
|
572 | if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); |
|
|
573 | #endif |
455 | #if HAVE_EPOLL |
574 | #if EV_USE_EPOLL |
456 | if (ev_method == EVMETHOD_NONE) epoll_init (flags); |
575 | if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); |
457 | #endif |
576 | #endif |
|
|
577 | #if EV_USEV_POLL |
|
|
578 | if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); |
|
|
579 | #endif |
458 | #if HAVE_SELECT |
580 | #if EV_USE_SELECT |
459 | if (ev_method == EVMETHOD_NONE) select_init (flags); |
581 | if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); |
460 | #endif |
582 | #endif |
461 | |
583 | |
462 | if (ev_method) |
584 | if (method) |
463 | { |
585 | { |
464 | ev_watcher_init (&sigev, sigcb); |
586 | ev_watcher_init (&sigev, sigcb); |
|
|
587 | ev_set_priority (&sigev, EV_MAXPRI); |
465 | siginit (); |
588 | siginit (EV_A); |
466 | |
589 | |
|
|
590 | #ifndef WIN32 |
467 | ev_signal_init (&childev, childcb, SIGCHLD); |
591 | ev_signal_init (&childev, childcb, SIGCHLD); |
|
|
592 | ev_set_priority (&childev, EV_MAXPRI); |
468 | ev_signal_start (&childev); |
593 | ev_signal_start (EV_A_ &childev); |
|
|
594 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
595 | #endif |
469 | } |
596 | } |
470 | } |
597 | } |
471 | |
598 | |
472 | return ev_method; |
599 | return method; |
473 | } |
600 | } |
474 | |
601 | |
475 | /*****************************************************************************/ |
602 | /*****************************************************************************/ |
476 | |
603 | |
477 | void |
604 | void |
478 | ev_prefork (void) |
605 | ev_fork_prepare (void) |
479 | { |
606 | { |
480 | /* nop */ |
607 | /* nop */ |
481 | } |
608 | } |
482 | |
609 | |
483 | void |
610 | void |
484 | ev_postfork_parent (void) |
611 | ev_fork_parent (void) |
485 | { |
612 | { |
486 | /* nop */ |
613 | /* nop */ |
487 | } |
614 | } |
488 | |
615 | |
489 | void |
616 | void |
490 | ev_postfork_child (void) |
617 | ev_fork_child (void) |
491 | { |
618 | { |
492 | #if HAVE_EPOLL |
619 | #if EV_USE_EPOLL |
493 | if (ev_method == EVMETHOD_EPOLL) |
620 | if (method == EVMETHOD_EPOLL) |
494 | epoll_postfork_child (); |
621 | epoll_postfork_child (); |
495 | #endif |
622 | #endif |
496 | |
623 | |
497 | ev_io_stop (&sigev); |
624 | ev_io_stop (&sigev); |
498 | close (sigpipe [0]); |
625 | close (sigpipe [0]); |
… | |
… | |
502 | } |
629 | } |
503 | |
630 | |
504 | /*****************************************************************************/ |
631 | /*****************************************************************************/ |
505 | |
632 | |
506 | static void |
633 | static void |
507 | call_pending (void) |
634 | call_pending (EV_P) |
508 | { |
635 | { |
|
|
636 | int pri; |
|
|
637 | |
|
|
638 | for (pri = NUMPRI; pri--; ) |
509 | while (pendingcnt) |
639 | while (pendingcnt [pri]) |
510 | { |
640 | { |
511 | ANPENDING *p = pendings + --pendingcnt; |
641 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
512 | |
642 | |
513 | if (p->w) |
643 | if (p->w) |
514 | { |
644 | { |
515 | p->w->pending = 0; |
645 | p->w->pending = 0; |
516 | p->w->cb (p->w, p->events); |
646 | p->w->cb (EV_A_ p->w, p->events); |
517 | } |
647 | } |
518 | } |
648 | } |
519 | } |
649 | } |
520 | |
650 | |
521 | static void |
651 | static void |
522 | timers_reify (void) |
652 | timers_reify (EV_P) |
523 | { |
653 | { |
524 | while (timercnt && timers [0]->at <= now) |
654 | while (timercnt && timers [0]->at <= mn_now) |
525 | { |
655 | { |
526 | struct ev_timer *w = timers [0]; |
656 | struct ev_timer *w = timers [0]; |
527 | |
|
|
528 | event ((W)w, EV_TIMEOUT); |
|
|
529 | |
657 | |
530 | /* first reschedule or stop timer */ |
658 | /* first reschedule or stop timer */ |
531 | if (w->repeat) |
659 | if (w->repeat) |
532 | { |
660 | { |
|
|
661 | assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
533 | w->at = now + w->repeat; |
662 | w->at = mn_now + w->repeat; |
534 | assert (("timer timeout in the past, negative repeat?", w->at > now)); |
|
|
535 | downheap ((WT *)timers, timercnt, 0); |
663 | downheap ((WT *)timers, timercnt, 0); |
536 | } |
664 | } |
537 | else |
665 | else |
538 | ev_timer_stop (w); /* nonrepeating: stop timer */ |
666 | ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
539 | } |
|
|
540 | } |
|
|
541 | |
667 | |
|
|
668 | event ((W)w, EV_TIMEOUT); |
|
|
669 | } |
|
|
670 | } |
|
|
671 | |
542 | static void |
672 | static void |
543 | periodics_reify (void) |
673 | periodics_reify (EV_P) |
544 | { |
674 | { |
545 | while (periodiccnt && periodics [0]->at <= ev_now) |
675 | while (periodiccnt && periodics [0]->at <= rt_now) |
546 | { |
676 | { |
547 | struct ev_periodic *w = periodics [0]; |
677 | struct ev_periodic *w = periodics [0]; |
548 | |
678 | |
549 | /* first reschedule or stop timer */ |
679 | /* first reschedule or stop timer */ |
550 | if (w->interval) |
680 | if (w->interval) |
551 | { |
681 | { |
552 | w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; |
682 | w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; |
553 | assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); |
683 | assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); |
554 | downheap ((WT *)periodics, periodiccnt, 0); |
684 | downheap ((WT *)periodics, periodiccnt, 0); |
555 | } |
685 | } |
556 | else |
686 | else |
557 | ev_periodic_stop (w); /* nonrepeating: stop timer */ |
687 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
558 | |
688 | |
559 | event ((W)w, EV_TIMEOUT); |
689 | event (EV_A_ (W)w, EV_PERIODIC); |
560 | } |
690 | } |
561 | } |
691 | } |
562 | |
692 | |
563 | static void |
693 | static void |
564 | periodics_reschedule (ev_tstamp diff) |
694 | periodics_reschedule (EV_P_ ev_tstamp diff) |
565 | { |
695 | { |
566 | int i; |
696 | int i; |
567 | |
697 | |
568 | /* adjust periodics after time jump */ |
698 | /* adjust periodics after time jump */ |
569 | for (i = 0; i < periodiccnt; ++i) |
699 | for (i = 0; i < periodiccnt; ++i) |
570 | { |
700 | { |
571 | struct ev_periodic *w = periodics [i]; |
701 | struct ev_periodic *w = periodics [i]; |
572 | |
702 | |
573 | if (w->interval) |
703 | if (w->interval) |
574 | { |
704 | { |
575 | ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; |
705 | ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; |
576 | |
706 | |
577 | if (fabs (diff) >= 1e-4) |
707 | if (fabs (diff) >= 1e-4) |
578 | { |
708 | { |
579 | ev_periodic_stop (w); |
709 | ev_periodic_stop (EV_A_ w); |
580 | ev_periodic_start (w); |
710 | ev_periodic_start (EV_A_ w); |
581 | |
711 | |
582 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
712 | i = 0; /* restart loop, inefficient, but time jumps should be rare */ |
583 | } |
713 | } |
584 | } |
714 | } |
585 | } |
715 | } |
586 | } |
716 | } |
587 | |
717 | |
|
|
718 | inline int |
|
|
719 | time_update_monotonic (EV_P) |
|
|
720 | { |
|
|
721 | mn_now = get_clock (); |
|
|
722 | |
|
|
723 | if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
724 | { |
|
|
725 | rt_now = mn_now + diff; |
|
|
726 | return 0; |
|
|
727 | } |
|
|
728 | else |
|
|
729 | { |
|
|
730 | now_floor = mn_now; |
|
|
731 | rt_now = ev_time (); |
|
|
732 | return 1; |
|
|
733 | } |
|
|
734 | } |
|
|
735 | |
588 | static void |
736 | static void |
589 | time_update (void) |
737 | time_update (EV_P) |
590 | { |
738 | { |
591 | int i; |
739 | int i; |
592 | |
740 | |
593 | ev_now = ev_time (); |
741 | #if EV_USE_MONOTONIC |
594 | |
|
|
595 | if (have_monotonic) |
742 | if (expect_true (have_monotonic)) |
596 | { |
743 | { |
597 | ev_tstamp odiff = diff; |
744 | if (time_update_monotonic (EV_A)) |
598 | |
|
|
599 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
|
|
600 | { |
745 | { |
601 | now = get_clock (); |
746 | ev_tstamp odiff = diff; |
|
|
747 | |
|
|
748 | for (i = 4; --i; ) /* loop a few times, before making important decisions */ |
|
|
749 | { |
602 | diff = ev_now - now; |
750 | diff = rt_now - mn_now; |
603 | |
751 | |
604 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
752 | if (fabs (odiff - diff) < MIN_TIMEJUMP) |
605 | return; /* all is well */ |
753 | return; /* all is well */ |
606 | |
754 | |
607 | ev_now = ev_time (); |
755 | rt_now = ev_time (); |
|
|
756 | mn_now = get_clock (); |
|
|
757 | now_floor = mn_now; |
|
|
758 | } |
|
|
759 | |
|
|
760 | periodics_reschedule (EV_A_ diff - odiff); |
|
|
761 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
608 | } |
762 | } |
609 | |
|
|
610 | periodics_reschedule (diff - odiff); |
|
|
611 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
612 | } |
763 | } |
613 | else |
764 | else |
|
|
765 | #endif |
614 | { |
766 | { |
615 | if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) |
767 | rt_now = ev_time (); |
|
|
768 | |
|
|
769 | if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) |
616 | { |
770 | { |
617 | periodics_reschedule (ev_now - now); |
771 | periodics_reschedule (EV_A_ rt_now - mn_now); |
618 | |
772 | |
619 | /* adjust timers. this is easy, as the offset is the same for all */ |
773 | /* adjust timers. this is easy, as the offset is the same for all */ |
620 | for (i = 0; i < timercnt; ++i) |
774 | for (i = 0; i < timercnt; ++i) |
621 | timers [i]->at += diff; |
775 | timers [i]->at += diff; |
622 | } |
776 | } |
623 | |
777 | |
624 | now = ev_now; |
778 | mn_now = rt_now; |
625 | } |
779 | } |
626 | } |
780 | } |
627 | |
781 | |
628 | int ev_loop_done; |
782 | void |
|
|
783 | ev_ref (EV_P) |
|
|
784 | { |
|
|
785 | ++activecnt; |
|
|
786 | } |
629 | |
787 | |
|
|
788 | void |
|
|
789 | ev_unref (EV_P) |
|
|
790 | { |
|
|
791 | --activecnt; |
|
|
792 | } |
|
|
793 | |
|
|
794 | static int loop_done; |
|
|
795 | |
|
|
796 | void |
630 | void ev_loop (int flags) |
797 | ev_loop (EV_P_ int flags) |
631 | { |
798 | { |
632 | double block; |
799 | double block; |
633 | ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
800 | loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; |
634 | |
801 | |
635 | do |
802 | do |
636 | { |
803 | { |
637 | /* queue check watchers (and execute them) */ |
804 | /* queue check watchers (and execute them) */ |
638 | if (preparecnt) |
805 | if (expect_false (preparecnt)) |
639 | { |
806 | { |
640 | queue_events ((W *)prepares, preparecnt, EV_PREPARE); |
807 | queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
641 | call_pending (); |
808 | call_pending (EV_A); |
642 | } |
809 | } |
643 | |
810 | |
644 | /* update fd-related kernel structures */ |
811 | /* update fd-related kernel structures */ |
645 | fd_reify (); |
812 | fd_reify (EV_A); |
646 | |
813 | |
647 | /* calculate blocking time */ |
814 | /* calculate blocking time */ |
648 | |
815 | |
649 | /* we only need this for !monotonic clockor timers, but as we basically |
816 | /* we only need this for !monotonic clockor timers, but as we basically |
650 | always have timers, we just calculate it always */ |
817 | always have timers, we just calculate it always */ |
|
|
818 | #if EV_USE_MONOTONIC |
|
|
819 | if (expect_true (have_monotonic)) |
|
|
820 | time_update_monotonic (EV_A); |
|
|
821 | else |
|
|
822 | #endif |
|
|
823 | { |
651 | ev_now = ev_time (); |
824 | rt_now = ev_time (); |
|
|
825 | mn_now = rt_now; |
|
|
826 | } |
652 | |
827 | |
653 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
828 | if (flags & EVLOOP_NONBLOCK || idlecnt) |
654 | block = 0.; |
829 | block = 0.; |
655 | else |
830 | else |
656 | { |
831 | { |
657 | block = MAX_BLOCKTIME; |
832 | block = MAX_BLOCKTIME; |
658 | |
833 | |
659 | if (timercnt) |
834 | if (timercnt) |
660 | { |
835 | { |
661 | ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; |
836 | ev_tstamp to = timers [0]->at - mn_now + method_fudge; |
662 | if (block > to) block = to; |
837 | if (block > to) block = to; |
663 | } |
838 | } |
664 | |
839 | |
665 | if (periodiccnt) |
840 | if (periodiccnt) |
666 | { |
841 | { |
667 | ev_tstamp to = periodics [0]->at - ev_now + method_fudge; |
842 | ev_tstamp to = periodics [0]->at - rt_now + method_fudge; |
668 | if (block > to) block = to; |
843 | if (block > to) block = to; |
669 | } |
844 | } |
670 | |
845 | |
671 | if (block < 0.) block = 0.; |
846 | if (block < 0.) block = 0.; |
672 | } |
847 | } |
673 | |
848 | |
674 | method_poll (block); |
849 | method_poll (EV_A_ block); |
675 | |
850 | |
676 | /* update ev_now, do magic */ |
851 | /* update rt_now, do magic */ |
677 | time_update (); |
852 | time_update (EV_A); |
678 | |
853 | |
679 | /* queue pending timers and reschedule them */ |
854 | /* queue pending timers and reschedule them */ |
680 | timers_reify (); /* relative timers called last */ |
855 | timers_reify (EV_A); /* relative timers called last */ |
681 | periodics_reify (); /* absolute timers called first */ |
856 | periodics_reify (EV_A); /* absolute timers called first */ |
682 | |
857 | |
683 | /* queue idle watchers unless io or timers are pending */ |
858 | /* queue idle watchers unless io or timers are pending */ |
684 | if (!pendingcnt) |
859 | if (!pendingcnt) |
685 | queue_events ((W *)idles, idlecnt, EV_IDLE); |
860 | queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); |
686 | |
861 | |
687 | /* queue check watchers, to be executed first */ |
862 | /* queue check watchers, to be executed first */ |
688 | if (checkcnt) |
863 | if (checkcnt) |
689 | queue_events ((W *)checks, checkcnt, EV_CHECK); |
864 | queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
690 | |
865 | |
691 | call_pending (); |
866 | call_pending (EV_A); |
692 | } |
867 | } |
693 | while (!ev_loop_done); |
868 | while (activecnt && !loop_done); |
694 | |
869 | |
695 | if (ev_loop_done != 2) |
870 | if (loop_done != 2) |
696 | ev_loop_done = 0; |
871 | loop_done = 0; |
|
|
872 | } |
|
|
873 | |
|
|
874 | void |
|
|
875 | ev_unloop (EV_P_ int how) |
|
|
876 | { |
|
|
877 | loop_done = how; |
697 | } |
878 | } |
698 | |
879 | |
699 | /*****************************************************************************/ |
880 | /*****************************************************************************/ |
700 | |
881 | |
701 | static void |
882 | inline void |
702 | wlist_add (WL *head, WL elem) |
883 | wlist_add (WL *head, WL elem) |
703 | { |
884 | { |
704 | elem->next = *head; |
885 | elem->next = *head; |
705 | *head = elem; |
886 | *head = elem; |
706 | } |
887 | } |
707 | |
888 | |
708 | static void |
889 | inline void |
709 | wlist_del (WL *head, WL elem) |
890 | wlist_del (WL *head, WL elem) |
710 | { |
891 | { |
711 | while (*head) |
892 | while (*head) |
712 | { |
893 | { |
713 | if (*head == elem) |
894 | if (*head == elem) |
… | |
… | |
718 | |
899 | |
719 | head = &(*head)->next; |
900 | head = &(*head)->next; |
720 | } |
901 | } |
721 | } |
902 | } |
722 | |
903 | |
723 | static void |
904 | inline void |
724 | ev_clear (W w) |
905 | ev_clear_pending (EV_P_ W w) |
725 | { |
906 | { |
726 | if (w->pending) |
907 | if (w->pending) |
727 | { |
908 | { |
728 | pendings [w->pending - 1].w = 0; |
909 | pendings [ABSPRI (w)][w->pending - 1].w = 0; |
729 | w->pending = 0; |
910 | w->pending = 0; |
730 | } |
911 | } |
731 | } |
912 | } |
732 | |
913 | |
733 | static void |
914 | inline void |
734 | ev_start (W w, int active) |
915 | ev_start (EV_P_ W w, int active) |
735 | { |
916 | { |
|
|
917 | if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; |
|
|
918 | if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; |
|
|
919 | |
736 | w->active = active; |
920 | w->active = active; |
|
|
921 | ev_ref (EV_A); |
737 | } |
922 | } |
738 | |
923 | |
739 | static void |
924 | inline void |
740 | ev_stop (W w) |
925 | ev_stop (EV_P_ W w) |
741 | { |
926 | { |
|
|
927 | ev_unref (EV_A); |
742 | w->active = 0; |
928 | w->active = 0; |
743 | } |
929 | } |
744 | |
930 | |
745 | /*****************************************************************************/ |
931 | /*****************************************************************************/ |
746 | |
932 | |
747 | void |
933 | void |
748 | ev_io_start (struct ev_io *w) |
934 | ev_io_start (EV_P_ struct ev_io *w) |
749 | { |
935 | { |
|
|
936 | int fd = w->fd; |
|
|
937 | |
750 | if (ev_is_active (w)) |
938 | if (ev_is_active (w)) |
751 | return; |
939 | return; |
752 | |
940 | |
753 | int fd = w->fd; |
941 | assert (("ev_io_start called with negative fd", fd >= 0)); |
754 | |
942 | |
755 | ev_start ((W)w, 1); |
943 | ev_start (EV_A_ (W)w, 1); |
756 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
944 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
757 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
945 | wlist_add ((WL *)&anfds[fd].head, (WL)w); |
758 | |
946 | |
759 | fd_change (fd); |
947 | fd_change (EV_A_ fd); |
760 | } |
948 | } |
761 | |
949 | |
762 | void |
950 | void |
763 | ev_io_stop (struct ev_io *w) |
951 | ev_io_stop (EV_P_ struct ev_io *w) |
764 | { |
952 | { |
765 | ev_clear ((W)w); |
953 | ev_clear_pending (EV_A_ (W)w); |
766 | if (!ev_is_active (w)) |
954 | if (!ev_is_active (w)) |
767 | return; |
955 | return; |
768 | |
956 | |
769 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
957 | wlist_del ((WL *)&anfds[w->fd].head, (WL)w); |
770 | ev_stop ((W)w); |
958 | ev_stop (EV_A_ (W)w); |
771 | |
959 | |
772 | fd_change (w->fd); |
960 | fd_change (EV_A_ w->fd); |
773 | } |
961 | } |
774 | |
962 | |
775 | void |
963 | void |
776 | ev_timer_start (struct ev_timer *w) |
964 | ev_timer_start (EV_P_ struct ev_timer *w) |
777 | { |
965 | { |
778 | if (ev_is_active (w)) |
966 | if (ev_is_active (w)) |
779 | return; |
967 | return; |
780 | |
968 | |
781 | w->at += now; |
969 | w->at += mn_now; |
782 | |
970 | |
783 | assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); |
971 | assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
784 | |
972 | |
785 | ev_start ((W)w, ++timercnt); |
973 | ev_start (EV_A_ (W)w, ++timercnt); |
786 | array_needsize (timers, timermax, timercnt, ); |
974 | array_needsize (timers, timermax, timercnt, ); |
787 | timers [timercnt - 1] = w; |
975 | timers [timercnt - 1] = w; |
788 | upheap ((WT *)timers, timercnt - 1); |
976 | upheap ((WT *)timers, timercnt - 1); |
789 | } |
977 | } |
790 | |
978 | |
791 | void |
979 | void |
792 | ev_timer_stop (struct ev_timer *w) |
980 | ev_timer_stop (EV_P_ struct ev_timer *w) |
793 | { |
981 | { |
794 | ev_clear ((W)w); |
982 | ev_clear_pending (EV_A_ (W)w); |
795 | if (!ev_is_active (w)) |
983 | if (!ev_is_active (w)) |
796 | return; |
984 | return; |
797 | |
985 | |
798 | if (w->active < timercnt--) |
986 | if (w->active < timercnt--) |
799 | { |
987 | { |
… | |
… | |
801 | downheap ((WT *)timers, timercnt, w->active - 1); |
989 | downheap ((WT *)timers, timercnt, w->active - 1); |
802 | } |
990 | } |
803 | |
991 | |
804 | w->at = w->repeat; |
992 | w->at = w->repeat; |
805 | |
993 | |
806 | ev_stop ((W)w); |
994 | ev_stop (EV_A_ (W)w); |
807 | } |
995 | } |
808 | |
996 | |
809 | void |
997 | void |
810 | ev_timer_again (struct ev_timer *w) |
998 | ev_timer_again (EV_P_ struct ev_timer *w) |
811 | { |
999 | { |
812 | if (ev_is_active (w)) |
1000 | if (ev_is_active (w)) |
813 | { |
1001 | { |
814 | if (w->repeat) |
1002 | if (w->repeat) |
815 | { |
1003 | { |
816 | w->at = now + w->repeat; |
1004 | w->at = mn_now + w->repeat; |
817 | downheap ((WT *)timers, timercnt, w->active - 1); |
1005 | downheap ((WT *)timers, timercnt, w->active - 1); |
818 | } |
1006 | } |
819 | else |
1007 | else |
820 | ev_timer_stop (w); |
1008 | ev_timer_stop (EV_A_ w); |
821 | } |
1009 | } |
822 | else if (w->repeat) |
1010 | else if (w->repeat) |
823 | ev_timer_start (w); |
1011 | ev_timer_start (EV_A_ w); |
824 | } |
1012 | } |
825 | |
1013 | |
826 | void |
1014 | void |
827 | ev_periodic_start (struct ev_periodic *w) |
1015 | ev_periodic_start (EV_P_ struct ev_periodic *w) |
828 | { |
1016 | { |
829 | if (ev_is_active (w)) |
1017 | if (ev_is_active (w)) |
830 | return; |
1018 | return; |
831 | |
1019 | |
832 | assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); |
1020 | assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); |
833 | |
1021 | |
834 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
1022 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
835 | if (w->interval) |
1023 | if (w->interval) |
836 | w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; |
1024 | w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; |
837 | |
1025 | |
838 | ev_start ((W)w, ++periodiccnt); |
1026 | ev_start (EV_A_ (W)w, ++periodiccnt); |
839 | array_needsize (periodics, periodicmax, periodiccnt, ); |
1027 | array_needsize (periodics, periodicmax, periodiccnt, ); |
840 | periodics [periodiccnt - 1] = w; |
1028 | periodics [periodiccnt - 1] = w; |
841 | upheap ((WT *)periodics, periodiccnt - 1); |
1029 | upheap ((WT *)periodics, periodiccnt - 1); |
842 | } |
1030 | } |
843 | |
1031 | |
844 | void |
1032 | void |
845 | ev_periodic_stop (struct ev_periodic *w) |
1033 | ev_periodic_stop (EV_P_ struct ev_periodic *w) |
846 | { |
1034 | { |
847 | ev_clear ((W)w); |
1035 | ev_clear_pending (EV_A_ (W)w); |
848 | if (!ev_is_active (w)) |
1036 | if (!ev_is_active (w)) |
849 | return; |
1037 | return; |
850 | |
1038 | |
851 | if (w->active < periodiccnt--) |
1039 | if (w->active < periodiccnt--) |
852 | { |
1040 | { |
853 | periodics [w->active - 1] = periodics [periodiccnt]; |
1041 | periodics [w->active - 1] = periodics [periodiccnt]; |
854 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
1042 | downheap ((WT *)periodics, periodiccnt, w->active - 1); |
855 | } |
1043 | } |
856 | |
1044 | |
857 | ev_stop ((W)w); |
1045 | ev_stop (EV_A_ (W)w); |
858 | } |
1046 | } |
859 | |
1047 | |
|
|
1048 | #ifndef SA_RESTART |
|
|
1049 | # define SA_RESTART 0 |
|
|
1050 | #endif |
|
|
1051 | |
860 | void |
1052 | void |
861 | ev_signal_start (struct ev_signal *w) |
1053 | ev_signal_start (EV_P_ struct ev_signal *w) |
862 | { |
1054 | { |
863 | if (ev_is_active (w)) |
1055 | if (ev_is_active (w)) |
864 | return; |
1056 | return; |
865 | |
1057 | |
|
|
1058 | assert (("ev_signal_start called with illegal signal number", w->signum > 0)); |
|
|
1059 | |
866 | ev_start ((W)w, 1); |
1060 | ev_start (EV_A_ (W)w, 1); |
867 | array_needsize (signals, signalmax, w->signum, signals_init); |
1061 | array_needsize (signals, signalmax, w->signum, signals_init); |
868 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
1062 | wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); |
869 | |
1063 | |
870 | if (!w->next) |
1064 | if (!w->next) |
871 | { |
1065 | { |
872 | struct sigaction sa; |
1066 | struct sigaction sa; |
873 | sa.sa_handler = sighandler; |
1067 | sa.sa_handler = sighandler; |
874 | sigfillset (&sa.sa_mask); |
1068 | sigfillset (&sa.sa_mask); |
875 | sa.sa_flags = 0; |
1069 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
876 | sigaction (w->signum, &sa, 0); |
1070 | sigaction (w->signum, &sa, 0); |
877 | } |
1071 | } |
878 | } |
1072 | } |
879 | |
1073 | |
880 | void |
1074 | void |
881 | ev_signal_stop (struct ev_signal *w) |
1075 | ev_signal_stop (EV_P_ struct ev_signal *w) |
882 | { |
1076 | { |
883 | ev_clear ((W)w); |
1077 | ev_clear_pending (EV_A_ (W)w); |
884 | if (!ev_is_active (w)) |
1078 | if (!ev_is_active (w)) |
885 | return; |
1079 | return; |
886 | |
1080 | |
887 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
1081 | wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); |
888 | ev_stop ((W)w); |
1082 | ev_stop (EV_A_ (W)w); |
889 | |
1083 | |
890 | if (!signals [w->signum - 1].head) |
1084 | if (!signals [w->signum - 1].head) |
891 | signal (w->signum, SIG_DFL); |
1085 | signal (w->signum, SIG_DFL); |
892 | } |
1086 | } |
893 | |
1087 | |
894 | void |
1088 | void |
895 | ev_idle_start (struct ev_idle *w) |
1089 | ev_idle_start (EV_P_ struct ev_idle *w) |
896 | { |
1090 | { |
897 | if (ev_is_active (w)) |
1091 | if (ev_is_active (w)) |
898 | return; |
1092 | return; |
899 | |
1093 | |
900 | ev_start ((W)w, ++idlecnt); |
1094 | ev_start (EV_A_ (W)w, ++idlecnt); |
901 | array_needsize (idles, idlemax, idlecnt, ); |
1095 | array_needsize (idles, idlemax, idlecnt, ); |
902 | idles [idlecnt - 1] = w; |
1096 | idles [idlecnt - 1] = w; |
903 | } |
1097 | } |
904 | |
1098 | |
905 | void |
1099 | void |
906 | ev_idle_stop (struct ev_idle *w) |
1100 | ev_idle_stop (EV_P_ struct ev_idle *w) |
907 | { |
1101 | { |
908 | ev_clear ((W)w); |
1102 | ev_clear_pending (EV_A_ (W)w); |
909 | if (ev_is_active (w)) |
1103 | if (ev_is_active (w)) |
910 | return; |
1104 | return; |
911 | |
1105 | |
912 | idles [w->active - 1] = idles [--idlecnt]; |
1106 | idles [w->active - 1] = idles [--idlecnt]; |
913 | ev_stop ((W)w); |
1107 | ev_stop (EV_A_ (W)w); |
914 | } |
1108 | } |
915 | |
1109 | |
916 | void |
1110 | void |
917 | ev_prepare_start (struct ev_prepare *w) |
1111 | ev_prepare_start (EV_P_ struct ev_prepare *w) |
918 | { |
1112 | { |
919 | if (ev_is_active (w)) |
1113 | if (ev_is_active (w)) |
920 | return; |
1114 | return; |
921 | |
1115 | |
922 | ev_start ((W)w, ++preparecnt); |
1116 | ev_start (EV_A_ (W)w, ++preparecnt); |
923 | array_needsize (prepares, preparemax, preparecnt, ); |
1117 | array_needsize (prepares, preparemax, preparecnt, ); |
924 | prepares [preparecnt - 1] = w; |
1118 | prepares [preparecnt - 1] = w; |
925 | } |
1119 | } |
926 | |
1120 | |
927 | void |
1121 | void |
928 | ev_prepare_stop (struct ev_prepare *w) |
1122 | ev_prepare_stop (EV_P_ struct ev_prepare *w) |
929 | { |
1123 | { |
930 | ev_clear ((W)w); |
1124 | ev_clear_pending (EV_A_ (W)w); |
931 | if (ev_is_active (w)) |
1125 | if (ev_is_active (w)) |
932 | return; |
1126 | return; |
933 | |
1127 | |
934 | prepares [w->active - 1] = prepares [--preparecnt]; |
1128 | prepares [w->active - 1] = prepares [--preparecnt]; |
935 | ev_stop ((W)w); |
1129 | ev_stop (EV_A_ (W)w); |
936 | } |
1130 | } |
937 | |
1131 | |
938 | void |
1132 | void |
939 | ev_check_start (struct ev_check *w) |
1133 | ev_check_start (EV_P_ struct ev_check *w) |
940 | { |
1134 | { |
941 | if (ev_is_active (w)) |
1135 | if (ev_is_active (w)) |
942 | return; |
1136 | return; |
943 | |
1137 | |
944 | ev_start ((W)w, ++checkcnt); |
1138 | ev_start (EV_A_ (W)w, ++checkcnt); |
945 | array_needsize (checks, checkmax, checkcnt, ); |
1139 | array_needsize (checks, checkmax, checkcnt, ); |
946 | checks [checkcnt - 1] = w; |
1140 | checks [checkcnt - 1] = w; |
947 | } |
1141 | } |
948 | |
1142 | |
949 | void |
1143 | void |
950 | ev_check_stop (struct ev_check *w) |
1144 | ev_check_stop (EV_P_ struct ev_check *w) |
951 | { |
1145 | { |
952 | ev_clear ((W)w); |
1146 | ev_clear_pending (EV_A_ (W)w); |
953 | if (ev_is_active (w)) |
1147 | if (ev_is_active (w)) |
954 | return; |
1148 | return; |
955 | |
1149 | |
956 | checks [w->active - 1] = checks [--checkcnt]; |
1150 | checks [w->active - 1] = checks [--checkcnt]; |
957 | ev_stop ((W)w); |
1151 | ev_stop (EV_A_ (W)w); |
958 | } |
1152 | } |
959 | |
1153 | |
960 | void |
1154 | void |
961 | ev_child_start (struct ev_child *w) |
1155 | ev_child_start (EV_P_ struct ev_child *w) |
962 | { |
1156 | { |
963 | if (ev_is_active (w)) |
1157 | if (ev_is_active (w)) |
964 | return; |
1158 | return; |
965 | |
1159 | |
966 | ev_start ((W)w, 1); |
1160 | ev_start (EV_A_ (W)w, 1); |
967 | wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1161 | wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
968 | } |
1162 | } |
969 | |
1163 | |
970 | void |
1164 | void |
971 | ev_child_stop (struct ev_child *w) |
1165 | ev_child_stop (EV_P_ struct ev_child *w) |
972 | { |
1166 | { |
973 | ev_clear ((W)w); |
1167 | ev_clear_pending (EV_A_ (W)w); |
974 | if (ev_is_active (w)) |
1168 | if (ev_is_active (w)) |
975 | return; |
1169 | return; |
976 | |
1170 | |
977 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
1171 | wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); |
978 | ev_stop ((W)w); |
1172 | ev_stop (EV_A_ (W)w); |
979 | } |
1173 | } |
980 | |
1174 | |
981 | /*****************************************************************************/ |
1175 | /*****************************************************************************/ |
982 | |
1176 | |
983 | struct ev_once |
1177 | struct ev_once |
… | |
… | |
987 | void (*cb)(int revents, void *arg); |
1181 | void (*cb)(int revents, void *arg); |
988 | void *arg; |
1182 | void *arg; |
989 | }; |
1183 | }; |
990 | |
1184 | |
991 | static void |
1185 | static void |
992 | once_cb (struct ev_once *once, int revents) |
1186 | once_cb (EV_P_ struct ev_once *once, int revents) |
993 | { |
1187 | { |
994 | void (*cb)(int revents, void *arg) = once->cb; |
1188 | void (*cb)(int revents, void *arg) = once->cb; |
995 | void *arg = once->arg; |
1189 | void *arg = once->arg; |
996 | |
1190 | |
997 | ev_io_stop (&once->io); |
1191 | ev_io_stop (EV_A_ &once->io); |
998 | ev_timer_stop (&once->to); |
1192 | ev_timer_stop (EV_A_ &once->to); |
999 | free (once); |
1193 | free (once); |
1000 | |
1194 | |
1001 | cb (revents, arg); |
1195 | cb (revents, arg); |
1002 | } |
1196 | } |
1003 | |
1197 | |
1004 | static void |
1198 | static void |
1005 | once_cb_io (struct ev_io *w, int revents) |
1199 | once_cb_io (EV_P_ struct ev_io *w, int revents) |
1006 | { |
1200 | { |
1007 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
1201 | once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); |
1008 | } |
1202 | } |
1009 | |
1203 | |
1010 | static void |
1204 | static void |
1011 | once_cb_to (struct ev_timer *w, int revents) |
1205 | once_cb_to (EV_P_ struct ev_timer *w, int revents) |
1012 | { |
1206 | { |
1013 | once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
1207 | once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); |
1014 | } |
1208 | } |
1015 | |
1209 | |
1016 | void |
1210 | void |
1017 | ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1211 | ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
1018 | { |
1212 | { |
1019 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
1213 | struct ev_once *once = malloc (sizeof (struct ev_once)); |
1020 | |
1214 | |
1021 | if (!once) |
1215 | if (!once) |
1022 | cb (EV_ERROR, arg); |
1216 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
1023 | else |
1217 | else |
1024 | { |
1218 | { |
1025 | once->cb = cb; |
1219 | once->cb = cb; |
1026 | once->arg = arg; |
1220 | once->arg = arg; |
1027 | |
1221 | |
1028 | ev_watcher_init (&once->io, once_cb_io); |
1222 | ev_watcher_init (&once->io, once_cb_io); |
1029 | |
|
|
1030 | if (fd >= 0) |
1223 | if (fd >= 0) |
1031 | { |
1224 | { |
1032 | ev_io_set (&once->io, fd, events); |
1225 | ev_io_set (&once->io, fd, events); |
1033 | ev_io_start (&once->io); |
1226 | ev_io_start (EV_A_ &once->io); |
1034 | } |
1227 | } |
1035 | |
1228 | |
1036 | ev_watcher_init (&once->to, once_cb_to); |
1229 | ev_watcher_init (&once->to, once_cb_to); |
1037 | |
|
|
1038 | if (timeout >= 0.) |
1230 | if (timeout >= 0.) |
1039 | { |
1231 | { |
1040 | ev_timer_set (&once->to, timeout, 0.); |
1232 | ev_timer_set (&once->to, timeout, 0.); |
1041 | ev_timer_start (&once->to); |
1233 | ev_timer_start (EV_A_ &once->to); |
1042 | } |
1234 | } |
1043 | } |
1235 | } |
1044 | } |
1236 | } |
1045 | |
1237 | |
1046 | /*****************************************************************************/ |
1238 | /*****************************************************************************/ |