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annotate src/core/ngx_shmtx.h @ 4321:c7e65deabf0d release-1.1.10

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nginx-1.1.10-RELEASE
author Maxim Dounin <mdounin@mdounin.ru>
date Wed, 30 Nov 2011 10:00:50 +0000
parents 3f6040cd731e
children d620f497c50f
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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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7 #ifndef _NGX_SHMTX_H_INCLUDED_
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8 #define _NGX_SHMTX_H_INCLUDED_
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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15 typedef struct {
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16 ngx_atomic_t lock;
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17 #if (NGX_HAVE_POSIX_SEM)
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18 ngx_atomic_t wait;
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19 #endif
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20 } ngx_shmtx_sh_t;
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22
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23 typedef struct {
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24 #if (NGX_HAVE_ATOMIC_OPS)
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25 ngx_atomic_t *lock;
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26 #if (NGX_HAVE_POSIX_SEM)
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27 ngx_atomic_t *wait;
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28 ngx_uint_t semaphore;
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29 sem_t sem;
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30 #endif
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31 #else
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32 ngx_fd_t fd;
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33 u_char *name;
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34 #endif
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35 ngx_uint_t spin;
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36 } ngx_shmtx_t;
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38
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39 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, ngx_shmtx_sh_t *addr,
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40 u_char *name);
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41 void ngx_shmtx_destory(ngx_shmtx_t *mtx);
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42 ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
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43 void ngx_shmtx_lock(ngx_shmtx_t *mtx);
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44 void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
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45 ngx_uint_t ngx_shmtx_force_unlock(ngx_shmtx_t *mtx, ngx_pid_t pid);
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48 #endif /* _NGX_SHMTX_H_INCLUDED_ */