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annotate src/core/ngx_shmtx.h @ 7736:a46fcf101cfc

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Core: added format specifiers to output binary data as hex. Now "s", "V", and "v" format specifiers may be prefixed with "x" (lowercase) or "X" (uppercase) to output corresponding data in hexadecimal format. In collaboration with Maxim Dounin.
author Vladimir Homutov <vl@nginx.com>
date Wed, 28 Oct 2020 10:56:11 +0300
parents 512c741fa841
children
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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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23
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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_ */