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.
53 lines
791 B
C
53 lines
791 B
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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void
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ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin)
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{
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#if (NGX_HAVE_ATOMIC_OPS)
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ngx_uint_t i, n;
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for ( ;; ) {
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if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
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return;
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}
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if (ngx_ncpu > 1) {
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for (n = 1; n < spin; n <<= 1) {
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for (i = 0; i < n; i++) {
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ngx_cpu_pause();
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}
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if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
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return;
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}
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}
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}
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ngx_sched_yield();
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}
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#else
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#if (NGX_THREADS)
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#error ngx_spinlock() or ngx_atomic_cmp_set() are not defined !
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#endif
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#endif
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}
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