Mercurial > hg > nginx

annotate src/event/ngx_event_busy_lock.c @ 4412:d620f497c50f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Copyright updated.
author Maxim Konovalov <maxim@nginx.com>
date Wed, 18 Jan 2012 15:07:43 +0000
parents 4c43e25d11ea
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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1
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
444
42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
4412
d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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parents: 351
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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6
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a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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8 #include <ngx_config.h>
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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9 #include <ngx_core.h>
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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10 #include <ngx_event.h>
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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11
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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12
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13 static ngx_int_t ngx_event_busy_lock_look_cacheable(ngx_event_busy_lock_t *bl,
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14 ngx_event_busy_lock_ctx_t *ctx);
276
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15 static void ngx_event_busy_lock_handler(ngx_event_t *ev);
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16 static void ngx_event_busy_lock_posted_handler(ngx_event_t *ev);
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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17
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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18
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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19 /*
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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20 * NGX_OK: the busy lock is held
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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21 * NGX_AGAIN: the all busy locks are held but we will wait the specified time
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ee394e997c77 nginx-0.0.3-2004-03-29-21:43:58 import
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22 * NGX_BUSY: ctx->timer == 0: there are many the busy locks
ee394e997c77 nginx-0.0.3-2004-03-29-21:43:58 import
Igor Sysoev <igor@sysoev.ru>
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23 * ctx->timer != 0: there are many the waiting locks
276
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24 */
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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25
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26 ngx_int_t
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27 ngx_event_busy_lock(ngx_event_busy_lock_t *bl, 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 ngx_mutex_lock(bl->mutex);
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32
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33 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ctx->event->log, 0,
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34 "event busy lock: b:%d mb:%d",
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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35 bl->busy, bl->max_busy);
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36
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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37 if (bl->busy < bl->max_busy) {
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38 bl->busy++;
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39
276
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40 rc = NGX_OK;
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41
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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42 } else if (ctx->timer && bl->waiting < bl->max_waiting) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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43 bl->waiting++;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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44 ngx_add_timer(ctx->event, ctx->timer);
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45 ctx->event->handler = ngx_event_busy_lock_handler;
276
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46
351
af4c6b45a687 nginx-0.0.4-2004-06-10-22:36:57 import
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47 if (bl->events) {
af4c6b45a687 nginx-0.0.4-2004-06-10-22:36:57 import
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48 bl->last->next = ctx;
af4c6b45a687 nginx-0.0.4-2004-06-10-22:36:57 import
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49
276
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50 } else {
351
af4c6b45a687 nginx-0.0.4-2004-06-10-22:36:57 import
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51 bl->events = ctx;
276
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52 }
351
af4c6b45a687 nginx-0.0.4-2004-06-10-22:36:57 import
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53
276
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54 bl->last = ctx;
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55
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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56 rc = NGX_AGAIN;
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57
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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58 } else {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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59 rc = NGX_BUSY;
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60 }
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61
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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62 ngx_mutex_unlock(bl->mutex);
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63
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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64 return rc;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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65 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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66
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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67
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68 ngx_int_t
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69 ngx_event_busy_lock_cacheable(ngx_event_busy_lock_t *bl,
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70 ngx_event_busy_lock_ctx_t *ctx)
276
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71 {
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72 ngx_int_t rc;
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73
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74 ngx_mutex_lock(bl->mutex);
276
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75
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76 rc = ngx_event_busy_lock_look_cacheable(bl, ctx);
276
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77
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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78 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ctx->event->log, 0,
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79 "event busy lock: %d w:%d mw:%d",
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80 rc, bl->waiting, bl->max_waiting);
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81
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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82 /*
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83 * NGX_OK: no the same request, there is free slot and we locked it
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84 * NGX_BUSY: no the same request and there is no free slot
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85 * NGX_AGAIN: the same request is processing
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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86 */
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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87
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88 if (rc == NGX_AGAIN) {
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89
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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90 if (ctx->timer && bl->waiting < bl->max_waiting) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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91 bl->waiting++;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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92 ngx_add_timer(ctx->event, ctx->timer);
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93 ctx->event->handler = ngx_event_busy_lock_handler;
276
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94
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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95 if (bl->events == NULL) {
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96 bl->events = ctx;
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97 } else {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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98 bl->last->next = ctx;
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99 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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100 bl->last = ctx;
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101
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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102 } else {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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103 rc = NGX_BUSY;
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104 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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105 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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106
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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107 ngx_mutex_unlock(bl->mutex);
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108
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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109 return rc;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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110 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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111
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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112
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113 void
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114 ngx_event_busy_unlock(ngx_event_busy_lock_t *bl,
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115 ngx_event_busy_lock_ctx_t *ctx)
276
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116 {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
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117 ngx_event_t *ev;
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118 ngx_event_busy_lock_ctx_t *wakeup;
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119
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120 ngx_mutex_lock(bl->mutex);
276
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diff changeset
121
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
122 if (bl->events) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
123 wakeup = bl->events;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
124 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
125
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
126 } else {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
127 wakeup = NULL;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
128 bl->busy--;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
129 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
130
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
131 /*
277
e91499541410 nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 276
diff changeset
132 * 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
133 * 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
134 */
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
135
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
136 if (wakeup == NULL) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
137 ngx_mutex_unlock(bl->mutex);
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
138 return;
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
139 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
140
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
141 if (ctx->md5) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
142 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
143 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
144 continue;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
145 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
146
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
147 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
148 wakeup->cache_updated = 1;
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 ev = wakeup->event;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
151
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
152 ngx_post_event(ev, &ngx_posted_events);
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
153 }
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 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
156
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
157 } else {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
158 bl->waiting--;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
159
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
160 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
161
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
162 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
163 wakeup->locked = 1;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
164
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
165 ev = wakeup->event;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
166
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
167 if (ev->timer_set) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
168 ngx_del_timer(ev);
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
169 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
170
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
171 ngx_post_event(ev, &ngx_posted_events);
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
172 }
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
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
175
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
176 void
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
177 ngx_event_busy_lock_cancel(ngx_event_busy_lock_t *bl,
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
178 ngx_event_busy_lock_ctx_t *ctx)
276
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 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
181
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
182 ngx_mutex_lock(bl->mutex);
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
183
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
184 bl->waiting--;
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 if (ctx == bl->events) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
187 bl->events = ctx->next;
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 } else {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
190 p = bl->events;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
191 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
192 if (c == ctx) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
193 p->next = ctx->next;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
194 break;
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 p = c;
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 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
199
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
200 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
201 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
202
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
203
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
204 static ngx_int_t
1565
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
205 ngx_event_busy_lock_look_cacheable(ngx_event_busy_lock_t *bl,
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
206 ngx_event_busy_lock_ctx_t *ctx)
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
207 {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
208 ngx_int_t free;
1565
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
209 ngx_uint_t i, bit, cacheable, mask;
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 bit = 0;
1565
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
212 cacheable = 0;
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
213 free = -1;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
214
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215 #if (NGX_SUPPRESS_WARN)
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216 mask = 0;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
217 #endif
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
218
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
219 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
220
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
221 if ((bit & 7) == 0) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
222 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
223 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
224
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
225 if (mask & 1) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
226 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
227 ctx->waiting = 1;
e91499541410 nginx-0.0.2-2004-03-03-19:14:15 import
Igor Sysoev <igor@sysoev.ru>
parents: 276
diff changeset
228 ctx->slot = i;
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229 return NGX_AGAIN;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230 }
1565
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
231 cacheable++;
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
233 } else if (free == -1) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
234 free = i;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
235 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
236
1565
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
237 if (cacheable == bl->cacheable) {
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
238 if (free == -1 && cacheable < bl->max_busy) {
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
239 free = i + 1;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
240 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
241
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
242 break;
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
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
245 mask >>= 1;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
246 bit++;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
247 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
248
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
249 if (free == -1) {
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
250 return NGX_BUSY;
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
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
253 #if 0
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
254 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
255 return NGX_BUSY;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
256 }
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
257 #endif
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
258
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
259 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
260 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
261 ctx->slot = free;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
262
1565
4c43e25d11ea fix English grammar
Igor Sysoev <igor@sysoev.ru>
parents: 1354
diff changeset
263 bl->cacheable++;
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
264 bl->busy++;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
265
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
266 return NGX_OK;
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
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
269
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
270 static void
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
271 ngx_event_busy_lock_handler(ngx_event_t *ev)
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
272 {
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
273 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
274
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
275 ngx_post_event(ev, &ngx_posted_events);
276
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
276 }
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
563
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
279 static void
9c2f3ed7a247 nginx-0.3.3-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 509
diff changeset
280 ngx_event_busy_lock_posted_handler(ngx_event_t *ev)
276
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 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
283
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
284 ctx = ev->data;
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
285 ctx->handler(ev);
a2d1ccc96111 nginx-0.0.2-2004-03-03-00:14:37 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
286 }