Mercurial > hg > nginx-quic
annotate src/event/ngx_event_busy_lock.c @ 545:0148586012ab release-0.2.1
nginx-0.2.1-RELEASE import
*) Bugfix: if all backend using in load-balancing failed after one
error, then nginx may got caught in an endless loop; the bug had
appeared in 0.2.0.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 23 Sep 2005 14:43:49 +0000 |
parents | 9b8c906f6e63 |
children | 9c2f3ed7a247 |
rev | line source |
---|---|
441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_event.h> |
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10 |
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11 |
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12 static int ngx_event_busy_lock_look_cachable(ngx_event_busy_lock_t *bl, |
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13 ngx_event_busy_lock_ctx_t *ctx); |
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14 static void ngx_event_busy_lock_handler(ngx_event_t *ev); |
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15 static void ngx_event_busy_lock_posted_handler(ngx_event_t *ev); |
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16 |
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17 |
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18 /* |
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19 * NGX_OK: the busy lock is held |
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20 * NGX_AGAIN: the all busy locks are held but we will wait the specified time |
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21 * NGX_BUSY: ctx->timer == 0: there are many the busy locks |
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22 * ctx->timer != 0: there are many the waiting locks |
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23 * NGX_ERROR: an error occured while the mutex locking |
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24 */ |
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25 |
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26 ngx_int_t ngx_event_busy_lock(ngx_event_busy_lock_t *bl, |
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27 ngx_event_busy_lock_ctx_t *ctx) |
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28 { |
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29 ngx_int_t rc; |
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30 |
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31 if (ngx_mutex_lock(bl->mutex) == NGX_ERROR) { |
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32 return NGX_ERROR; |
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33 } |
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34 |
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35 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ctx->event->log, 0, |
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36 "event busy lock: b:%d mb:%d", |
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37 bl->busy, bl->max_busy); |
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38 |
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39 if (bl->busy < bl->max_busy) { |
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40 bl->busy++; |
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41 rc = NGX_OK; |
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42 |
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43 } else if (ctx->timer && bl->waiting < bl->max_waiting) { |
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44 bl->waiting++; |
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45 ngx_add_timer(ctx->event, ctx->timer); |
509 | 46 ctx->event->handler = ngx_event_busy_lock_handler; |
276
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47 |
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48 if (bl->events) { |
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49 bl->last->next = ctx; |
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50 |
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51 } else { |
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52 bl->events = ctx; |
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53 } |
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54 |
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55 bl->last = ctx; |
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56 |
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57 rc = NGX_AGAIN; |
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58 |
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59 } else { |
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60 rc = NGX_BUSY; |
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61 } |
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62 |
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63 ngx_mutex_unlock(bl->mutex); |
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64 |
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65 return rc; |
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66 } |
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67 |
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68 |
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69 ngx_int_t ngx_event_busy_lock_cachable(ngx_event_busy_lock_t *bl, |
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70 ngx_event_busy_lock_ctx_t *ctx) |
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71 { |
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72 ngx_int_t rc; |
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73 |
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74 if (ngx_mutex_lock(bl->mutex) == NGX_ERROR) { |
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75 return NGX_ERROR; |
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76 } |
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77 |
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78 rc = ngx_event_busy_lock_look_cachable(bl, ctx); |
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79 |
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80 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ctx->event->log, 0, |
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81 "event busy lock: %d w:%d mw:%d", |
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82 rc, bl->waiting, bl->max_waiting); |
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83 |
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84 /* |
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85 * NGX_OK: no the same request, there is free slot and we locked it |
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86 * NGX_BUSY: no the same request and there is no free slot |
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87 * NGX_AGAIN: the same request is processing |
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88 */ |
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89 |
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90 if (rc == NGX_AGAIN) { |
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91 |
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92 if (ctx->timer && bl->waiting < bl->max_waiting) { |
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93 bl->waiting++; |
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94 ngx_add_timer(ctx->event, ctx->timer); |
509 | 95 ctx->event->handler = ngx_event_busy_lock_handler; |
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96 |
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97 if (bl->events == NULL) { |
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98 bl->events = ctx; |
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99 } else { |
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100 bl->last->next = ctx; |
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101 } |
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102 bl->last = ctx; |
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103 |
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104 } else { |
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105 rc = NGX_BUSY; |
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106 } |
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107 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
108 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
109 ngx_mutex_unlock(bl->mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
110 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
111 return rc; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
112 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
113 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
114 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
115 ngx_int_t ngx_event_busy_unlock(ngx_event_busy_lock_t *bl, |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
116 ngx_event_busy_lock_ctx_t *ctx) |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
117 { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
118 ngx_event_t *ev; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
119 ngx_event_busy_lock_ctx_t *wakeup; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
120 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
121 if (ngx_mutex_lock(bl->mutex) == NGX_ERROR) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
122 return NGX_ERROR; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
123 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
124 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
125 if (bl->events) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
126 wakeup = bl->events; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
127 bl->events = bl->events->next; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
128 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
129 } else { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
130 wakeup = NULL; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
131 bl->busy--; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
132 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
133 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
134 /* |
277
e91499541410
nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
276
diff
changeset
|
135 * MP: all ctx's and their queue must be in shared memory, |
e91499541410
nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
276
diff
changeset
|
136 * each ctx has pid to wake up |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
137 */ |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
138 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
139 if (wakeup == NULL) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
140 ngx_mutex_unlock(bl->mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
141 return NGX_OK; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
142 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
143 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
144 if (ctx->md5) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
145 for (wakeup = bl->events; wakeup; wakeup = wakeup->next) { |
277
e91499541410
nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
276
diff
changeset
|
146 if (wakeup->md5 == NULL || wakeup->slot != ctx->slot) { |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
147 continue; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
148 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
149 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
150 wakeup->handler = ngx_event_busy_lock_posted_handler; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
151 wakeup->cache_updated = 1; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
152 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
153 ev = wakeup->event; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
154 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
155 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
156 return NGX_ERROR; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
157 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
158 |
351
af4c6b45a687
nginx-0.0.4-2004-06-10-22:36:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
159 ngx_post_event(ev); |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
160 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
161 ngx_mutex_unlock(ngx_posted_events_mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
162 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
164 ngx_mutex_unlock(bl->mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
165 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
166 } else { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
167 bl->waiting--; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
168 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
169 ngx_mutex_unlock(bl->mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
170 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
171 wakeup->handler = ngx_event_busy_lock_posted_handler; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
172 wakeup->locked = 1; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
173 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
174 ev = wakeup->event; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
175 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
176 if (ev->timer_set) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
177 ngx_del_timer(ev); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
178 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
179 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
180 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
181 return NGX_ERROR; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
182 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
183 |
351
af4c6b45a687
nginx-0.0.4-2004-06-10-22:36:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
184 ngx_post_event(ev); |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
186 ngx_mutex_unlock(ngx_posted_events_mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
187 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
188 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
189 return NGX_OK; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
190 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
191 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
192 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
193 ngx_int_t ngx_event_busy_lock_cancel(ngx_event_busy_lock_t *bl, |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
194 ngx_event_busy_lock_ctx_t *ctx) |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
195 { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
196 ngx_event_busy_lock_ctx_t *c, *p; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
197 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
198 if (ngx_mutex_lock(bl->mutex) == NGX_ERROR) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 return NGX_ERROR; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
201 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
202 bl->waiting--; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
203 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
204 if (ctx == bl->events) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
205 bl->events = ctx->next; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
206 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
207 } else { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
208 p = bl->events; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
209 for (c = bl->events->next; c; c = c->next) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
210 if (c == ctx) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
211 p->next = ctx->next; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
212 break; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
213 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
214 p = c; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
215 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
216 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
217 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
218 ngx_mutex_unlock(bl->mutex); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
219 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
220 return NGX_OK; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
221 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
222 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
223 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
224 static int ngx_event_busy_lock_look_cachable(ngx_event_busy_lock_t *bl, |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
225 ngx_event_busy_lock_ctx_t *ctx) |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
226 { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
227 ngx_int_t free; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
228 ngx_uint_t i, bit, cachable, mask; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
229 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
230 bit = 0; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
231 cachable = 0; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
232 free = -1; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
233 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
234 #if (NGX_SUPPRESS_WARN) |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
235 mask = 0; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
236 #endif |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
237 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
238 for (i = 0; i < bl->max_busy; i++) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
239 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
240 if ((bit & 7) == 0) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
241 mask = bl->md5_mask[i / 8]; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
242 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
243 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
244 if (mask & 1) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
245 if (ngx_memcmp(&bl->md5[i * 16], ctx->md5, 16) == 0) { |
277
e91499541410
nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
276
diff
changeset
|
246 ctx->waiting = 1; |
e91499541410
nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
276
diff
changeset
|
247 ctx->slot = i; |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
248 return NGX_AGAIN; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
249 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
250 cachable++; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
251 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
252 } else if (free == -1) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
253 free = i; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
254 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
255 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
256 if (cachable == bl->cachable) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
257 if (free == -1 && cachable < bl->max_busy) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
258 free = i + 1; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
259 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
260 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
261 break; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
262 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
263 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
264 mask >>= 1; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
265 bit++; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
266 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
267 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
268 if (free == -1) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
269 return NGX_BUSY; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
270 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
271 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
272 #if 0 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
273 if (bl->busy == bl->max_busy) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
274 return NGX_BUSY; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
275 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
276 #endif |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
277 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
278 ngx_memcpy(&bl->md5[free * 16], ctx->md5, 16); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
279 bl->md5_mask[free / 8] |= 1 << (free & 7); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
280 ctx->slot = free; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
281 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
282 bl->cachable++; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
283 bl->busy++; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
284 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
285 return NGX_OK; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
286 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
287 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
288 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
289 static void ngx_event_busy_lock_handler(ngx_event_t *ev) |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
290 { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
291 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
292 return; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
293 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
294 |
351
af4c6b45a687
nginx-0.0.4-2004-06-10-22:36:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
295 ngx_post_event(ev); |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
296 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
297 ngx_mutex_unlock(ngx_posted_events_mutex); |
277
e91499541410
nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents:
276
diff
changeset
|
298 |
509 | 299 ev->handler = ngx_event_busy_lock_posted_handler; |
276
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
300 } |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
301 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
302 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
303 static void ngx_event_busy_lock_posted_handler(ngx_event_t *ev) |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
304 { |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
305 ngx_event_busy_lock_ctx_t *ctx; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
306 |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
307 ctx = ev->data; |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
308 ctx->handler(ev); |
a2d1ccc96111
nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
309 } |