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comparison src/os/unix/ngx_atomic.h @ 120:e85dca77c46a NGINX_0_3_7

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nginx 0.3.7 *) Feature: the "access_log" supports the "buffer=" parameter. *) Bugfix: nginx could not be built on platforms different from i386, amd64, sparc и ppc; bug appeared in 0.3.2.
author Igor Sysoev <http://sysoev.ru>
date Thu, 27 Oct 2005 00:00:00 +0400
parents 408f195b3482
children 73e8476f9142
comparison
equal deleted inserted replaced
119:85abc07cafba 120:e85dca77c46a
152 152
153 static ngx_inline ngx_atomic_uint_t 153 static ngx_inline ngx_atomic_uint_t
154 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, 154 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old,
155 ngx_atomic_uint_t set) 155 ngx_atomic_uint_t set)
156 { 156 {
157 if (*lock == old { 157 if (*lock == old) {
158 *lock = set; 158 *lock = set;
159 return 1; 159 return 1;
160 } 160 }
161 161
162 return 0; 162 return 0;
172 *value += add; 172 *value += add;
173 173
174 return old; 174 return old;
175 } 175 }
176 176
177 #define ngx_memory_barrier()
178
177 #endif 179 #endif
178
179 180
180 void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin); 181 void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin);
181 182
182 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) 183 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))
183 #define ngx_unlock(lock) *(lock) = 0 184 #define ngx_unlock(lock) *(lock) = 0