mirror of
https://github.com/nginx/nginx.git
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ffe714403d
*) Change: the "variables_hash_max_size" and
"variables_hash_bucket_size" directives.
*) Feature: the $body_bytes_sent variable can be used not only in the
"log_format" directive.
*) Feature: the $ssl_protocol and $ssl_cipher variables.
*) Feature: the cache line size detection for widespread CPUs at start
time.
*) Feature: now the "accept_mutex" directive is supported using
fcntl(2) on platforms different from i386, amd64, sparc64, and ppc.
*) Feature: the "lock_file" directive and the --with-lock-path=PATH
autoconfiguration directive.
*) Bugfix: if the HTTPS protocol was used in the "proxy_pass" directive
then the requests with the body was not transferred.
112 lines
1.7 KiB
C
112 lines
1.7 KiB
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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#else
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ngx_fd_t fd;
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u_char *name;
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ngx_log_t *log;
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#endif
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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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ngx_log_t *log);
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#if (NGX_HAVE_ATOMIC_OPS)
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static ngx_inline ngx_uint_t
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ngx_shmtx_trylock(ngx_shmtx_t *mtx)
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{
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if (*mtx->lock == 0 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid)) {
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return 1;
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}
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return 0;
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}
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#define ngx_shmtx_lock(mtx) ngx_spinlock((mtx)->lock, ngx_pid, 1024)
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#define ngx_shmtx_unlock(mtx) (void) ngx_atomic_cmp_set((mtx)->lock, ngx_pid, 0)
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#define ngx_shmtx_destory(mtx)
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#else
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static ngx_inline ngx_uint_t
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ngx_shmtx_trylock(ngx_shmtx_t *mtx)
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{
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ngx_err_t err;
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err = ngx_trylock_fd(mtx->fd);
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if (err == 0) {
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return 1;
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}
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if (err == NGX_EAGAIN) {
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return 0;
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}
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ngx_log_error(NGX_LOG_ALERT, mtx->log, err, ngx_trylock_fd_n " failed");
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ngx_abort();
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}
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static ngx_inline void
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ngx_shmtx_lock(ngx_shmtx_t *mtx)
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{
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ngx_err_t err;
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err = ngx_lock_fd(mtx->fd);
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if (err == 0) {
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return;
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}
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ngx_log_error(NGX_LOG_ALERT, mtx->log, err, ngx_lock_fd_n " failed");
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ngx_abort();
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}
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static ngx_inline void
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ngx_shmtx_unlock(ngx_shmtx_t *mtx)
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{
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ngx_err_t err;
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err = ngx_unlock_fd(mtx->fd);
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if (err == 0) {
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return;
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}
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ngx_log_error(NGX_LOG_ALERT, mtx->log, err, ngx_unlock_fd_n " failed");
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ngx_abort();
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}
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void ngx_shmtx_destory(ngx_shmtx_t *mtx);
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#endif
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#endif /* _NGX_SHMTX_H_INCLUDED_ */
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