From: yeom <yeom>
Date: Wed, 17 Nov 2010 03:40:43 +0000 (+0000)
Subject: grabs a lock when it tries to reset
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ac9babd769c4c4d509feda5bdb22e708dc722731;p=IRC.git

grabs a lock when it tries to reset
---

diff --git a/Robust/src/Runtime/psemaphore.c b/Robust/src/Runtime/psemaphore.c
index 64cdda50..05c7a155 100644
--- a/Robust/src/Runtime/psemaphore.c
+++ b/Robust/src/Runtime/psemaphore.c
@@ -42,12 +42,8 @@ void psem_give_tag( psemaphore* sem, int tag) {
 
 
 void psem_reset( psemaphore* sem ) {
-  // this should NEVER BE CALLED if it is possible
-  // the semaphore is still in use, NEVER
-  if( pthread_mutex_trylock( &(sem->lock) ) == EBUSY ) {
-    exit( -1 );
-  }
-  pthread_mutex_unlock( &(sem->lock) );
+  pthread_mutex_lock  ( &(sem->lock) );
   sem->tag++;
   sem->signaled = 0;
+  pthread_mutex_unlock( &(sem->lock) );
 }