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src/event/ngx_event_mutex.c - nginx-1.7.10

Functions defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #include <ngx_config.h>
  9. #include <ngx_core.h>
  10. #include <ngx_event.h>


  13. ‌ngx_int_t ngx_event_mutex_timedlock(ngx_event_mutex_t *m, ngx_msec_t timer,
  14.                                     ngx_event_t *ev)
  15. {
  16.     ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
  17.                    "lock event mutex %p lock:%XD", m, m->lock);

  19.     if (m->lock) {

  21.         if (m->events == NULL) {
  22.             m->events = ev;

  24.         } else {
  25.             m->last->next = ev;
  26.         }

  28.         m->last = ev;
  29.         ev->next = NULL;

  31. #if (NGX_THREADS0)
  32.         ev->light = 1;
  33. #endif

  35.         ngx_add_timer(ev, timer);

  37.         return NGX_AGAIN;
  38.     }

  40.     m->lock = 1;

  42.     return NGX_OK;
  43. }


  46. ‌ngx_int_t ngx_event_mutex_unlock(ngx_event_mutex_t *m, ngx_log_t *log)
  47. {
  48.     ngx_event_t  *ev;

  50.     if (m->lock == 0) {
  51.         ngx_log_error(NGX_LOG_ALERT, log, 0,
  52.                       "tring to unlock the free event mutex %p", m);
  53.         return NGX_ERROR;
  54.     }

  56.     ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0,
  57.                    "unlock event mutex %p, next event: %p", m, m->events);

  59.     m->lock = 0;

  61.     if (m->events) {
  62.         ev = m->events;
  63.         m->events = ev->next;

  65.         ev->next = ngx_posted_events;
  66.         ngx_posted_events = ev;
  67.     }

  69.     return NGX_OK;
  70. }

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