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38 lines
688 B
C
38 lines
688 B
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#ifndef _NGX_SHMTX_H_INCLUDED_
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#define _NGX_SHMTX_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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typedef struct {
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#if (NGX_HAVE_ATOMIC_OPS)
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ngx_atomic_t *lock;
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#if (NGX_HAVE_POSIX_SEM)
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ngx_uint_t semaphore;
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sem_t sem;
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#endif
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#else
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ngx_fd_t fd;
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u_char *name;
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#endif
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ngx_uint_t spin;
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} ngx_shmtx_t;
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ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name);
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void ngx_shmtx_destory(ngx_shmtx_t *mtx);
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ngx_uint_t ngx_shmtx_trylock(ngx_shmtx_t *mtx);
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void ngx_shmtx_lock(ngx_shmtx_t *mtx);
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void ngx_shmtx_unlock(ngx_shmtx_t *mtx);
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#endif /* _NGX_SHMTX_H_INCLUDED_ */
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