Introduced ngx_rwlock_downgrade().
author |
Ruslan Ermilov <ru@nginx.com> |
date |
Fri, 16 Jun 2017 18:15:58 +0300 |
parents |
12efcdcb8a4b |
children |
a39bc74873fa |
files |
src/core/ngx_rwlock.c src/core/ngx_rwlock.h |
diffstat |
2 files changed, 10 insertions(+), 0 deletions(-)
[+]
|
line diff
--- a/src/core/ngx_rwlock.c
+++ b/src/core/ngx_rwlock.c
@@ -109,6 +109,15 @@ ngx_rwlock_unlock(ngx_atomic_t *lock)
}
+void
+ngx_rwlock_downgrade(ngx_atomic_t *lock)
+{
+ if (*lock == NGX_RWLOCK_WLOCK) {
+ *lock = 1;
+ }
+}
+
+
#else
#if (NGX_HTTP_UPSTREAM_ZONE || NGX_STREAM_UPSTREAM_ZONE)
--- a/src/core/ngx_rwlock.h
+++ b/src/core/ngx_rwlock.h
@@ -16,6 +16,7 @@
void ngx_rwlock_wlock(ngx_atomic_t *lock);
void ngx_rwlock_rlock(ngx_atomic_t *lock);
void ngx_rwlock_unlock(ngx_atomic_t *lock);
+void ngx_rwlock_downgrade(ngx_atomic_t *lock);
#endif /* _NGX_RWLOCK_H_INCLUDED_ */