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Fix a bug in rwlock. When a rwlock was locked by reader threads, a

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writter thread can block reader threads to get read lock.
This commit is contained in:
David Xu 2003-03-14 01:02:47 +00:00
parent ee5803b89b
commit 047a20e644
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=112218
2 changed files with 2 additions and 2 deletions
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2
lib/libkse/thread/thr_rwlock.c
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@ -157,7 +157,7 @@ _pthread_rwlock_rdlock (pthread_rwlock_t *rwlock)
return(ret);
/* give writers priority over readers */
while (prwlock->blocked_writers || prwlock->state < 0) {
while (prwlock->state < 0) {
ret = pthread_cond_wait(&prwlock->read_signal, &prwlock->lock);
if (ret != 0) {

2
lib/libpthread/thread/thr_rwlock.c
View file

@ -157,7 +157,7 @@ _pthread_rwlock_rdlock (pthread_rwlock_t *rwlock)
return(ret);
/* give writers priority over readers */
while (prwlock->blocked_writers || prwlock->state < 0) {
while (prwlock->state < 0) {
ret = pthread_cond_wait(&prwlock->read_signal, &prwlock->lock);
if (ret != 0) {