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annotate src/core/ngx_shmtx.h @ 5112:d3c15c7831eb

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Upstream: call ngx_http_run_posted_requests() on resolve errors. If proxy_pass to a host with dynamic resolution was used to handle a subrequest, and host resolution failed, the main request wasn't run till something else happened on the connection. E.g. request to "/zzz" with the following configuration hanged: addition_types *; resolver 8.8.8.8; location /test { set $ihost xxx; proxy_pass http://$ihost; } location /zzz { add_after_body /test; return 200 "test"; } Report and original version of the patch by Lanshun Zhou, http://mailman.nginx.org/pipermail/nginx-devel/2013-March/003476.html.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 14 Mar 2013 12:37:54 +0000
parents 512c741fa841
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_SHMTX_H_INCLUDED_
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9 #define _NGX_SHMTX_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 typedef struct {
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17 ngx_atomic_t lock;
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18 #if (NGX_HAVE_POSIX_SEM)
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19 ngx_atomic_t wait;
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20 #endif
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21 } ngx_shmtx_sh_t;
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24 typedef struct {
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25 #if (NGX_HAVE_ATOMIC_OPS)
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26 ngx_atomic_t *lock;
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27 #if (NGX_HAVE_POSIX_SEM)
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28 ngx_atomic_t *wait;
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29 ngx_uint_t semaphore;
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30 sem_t sem;
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31 #endif
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32 #else
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33 ngx_fd_t fd;
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34 u_char *name;
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35 #endif
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36 ngx_uint_t spin;
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37 } ngx_shmtx_t;
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39
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40 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr,
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41 u_char *name);
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42 void ngx_shmtx_destroy(ngx_shmtx_t *mtx);
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43 ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
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44 void ngx_shmtx_lock(ngx_shmtx_t *mtx);
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45 void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
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46 ngx_uint_t ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid);
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49 #endif /* _NGX_SHMTX_H_INCLUDED_ */