3 * Copyright (C) Igor Sysoev
7 #include <ngx_config.h>
12 ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin)
15 #if (NGX_HAVE_ATOMIC_OPS)
21 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
27 for (n = 1; n < spin; n <<= 1) {
29 for (i = 0; i < n; i++) {
33 if (*lock == 0 && ngx_atomic_cmp_set(lock, 0, value)) {
46 #error ngx_spinlock() or ngx_atomic_cmp_set() are not defined !