Mercurial > hg > nginx-quic
annotate src/event/ngx_event_mutex.c @ 4569:1db899642518
Upstream: reject upstreams without normal servers.
Such upstreams cause CPU hog later in the code as number of peers isn't
expected to be 0. Currently this may happen either if there are only backup
servers defined in an upstream block, or if server with ipv6 address used
in an upstream block.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 02 Apr 2012 21:29:35 +0000 |
parents | d620f497c50f |
children | 3377f9459e99 |
rev | line source |
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441
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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13 ngx_int_t ngx_event_mutex_timedlock(ngx_event_mutex_t *m, ngx_msec_t timer, |
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14 ngx_event_t *ev) |
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15 { |
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16 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
461 | 17 "lock event mutex %p lock:%XD", m, m->lock); |
272
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18 |
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19 if (m->lock) { |
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20 |
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21 if (m->events == NULL) { |
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22 m->events = ev; |
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23 |
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24 } else { |
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25 m->last->next = ev; |
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26 } |
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27 |
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28 m->last = ev; |
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29 ev->next = NULL; |
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30 |
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31 #if (NGX_THREADS0) |
272
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32 ev->light = 1; |
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33 #endif |
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34 |
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35 ngx_add_timer(ev, timer); |
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36 |
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37 return NGX_AGAIN; |
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38 } |
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39 |
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40 m->lock = 1; |
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41 |
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42 return NGX_OK; |
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43 } |
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44 |
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45 |
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46 ngx_int_t ngx_event_mutex_unlock(ngx_event_mutex_t *m, ngx_log_t *log) |
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47 { |
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48 ngx_event_t *ev; |
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49 |
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50 if (m->lock == 0) { |
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51 ngx_log_error(NGX_LOG_ALERT, log, 0, |
461 | 52 "tring to unlock the free event mutex %p", m); |
272
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53 return NGX_ERROR; |
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54 } |
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55 |
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56 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0, |
461 | 57 "unlock event mutex %p, next event: %p", m, m->events); |
272
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58 |
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59 m->lock = 0; |
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60 |
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61 if (m->events) { |
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62 ev = m->events; |
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63 m->events = ev->next; |
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64 |
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65 ev->next = (ngx_event_t *) ngx_posted_events; |
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66 ngx_posted_events = ev; |
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67 } |
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68 |
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69 return NGX_OK; |
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70 } |