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author | Pavel Pautov <p.pautov@f5.com> | 2022-01-19 17:37:34 -0800 |
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committer | Pavel Pautov <p.pautov@f5.com> | 2022-01-19 17:37:34 -0800 |
commit | 950390108cbb8431845635176c36466653b05487 (patch) | |
tree | 4575dbb897d11ab184d8dbf1458cb6c3f0f6fb47 | |
parent | 429150c1fa78317bdb19de380ce709651dbc042c (diff) | |
download | nginx-950390108cbb8431845635176c36466653b05487.tar.gz |
Core: simplify reader lock release.
-rw-r--r-- | src/core/ngx_rwlock.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/src/core/ngx_rwlock.c b/src/core/ngx_rwlock.c index ed2b0f810..e7da8a8ec 100644 --- a/src/core/ngx_rwlock.c +++ b/src/core/ngx_rwlock.c @@ -89,22 +89,10 @@ ngx_rwlock_rlock(ngx_atomic_t *lock) void ngx_rwlock_unlock(ngx_atomic_t *lock) { - ngx_atomic_uint_t readers; - - readers = *lock; - - if (readers == NGX_RWLOCK_WLOCK) { + if (*lock == NGX_RWLOCK_WLOCK) { (void) ngx_atomic_cmp_set(lock, NGX_RWLOCK_WLOCK, 0); - return; - } - - for ( ;; ) { - - if (ngx_atomic_cmp_set(lock, readers, readers - 1)) { - return; - } - - readers = *lock; + } else { + (void) ngx_atomic_fetch_add(lock, -1); } } |