Core: simplify reader lock release.
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@ -89,22 +89,10 @@ ngx_rwlock_rlock(ngx_atomic_t *lock)
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void
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ngx_rwlock_unlock(ngx_atomic_t *lock)
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{
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ngx_atomic_uint_t readers;
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readers = *lock;
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if (readers == NGX_RWLOCK_WLOCK) {
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if (*lock == NGX_RWLOCK_WLOCK) {
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(void) ngx_atomic_cmp_set(lock, NGX_RWLOCK_WLOCK, 0);
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return;
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}
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for ( ;; ) {
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if (ngx_atomic_cmp_set(lock, readers, readers - 1)) {
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return;
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}
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readers = *lock;
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} else {
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(void) ngx_atomic_fetch_add(lock, -1);
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}
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}
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