ck_rwlock: Remove unncessary load fences, switch to full semantics on read unlock.

rwlock may also be used in SPMC workloads.
12 years ago · bf30d3439c
parent 65ebf86799
commit bf30d3439c
1 changed files with 1 additions and 3 deletions
--- a/include/ck_rwlock.h
+++ b/include/ck_rwlock.h
@ -113,7 +113,6 @@ ck_rwlock_read_trylock(ck_rwlock_t *rw)
 	return false;

 leave:
-	ck_pr_fence_load();
 	return true;
 }

@ -132,7 +131,6 @@ ck_rwlock_read_lock(ck_rwlock_t *rw)
 		ck_pr_dec_uint(&rw->n_readers);
 	}

-	ck_pr_fence_load();
 	return;
 }

@ -140,7 +138,7 @@ CK_CC_INLINE static void
 ck_rwlock_read_unlock(ck_rwlock_t *rw)
 {

-	ck_pr_fence_load();
+	ck_pr_fence_memory();
 	ck_pr_dec_uint(&rw->n_readers);
 	return;
 }