[llvm-commits] [llvm] r73806 - /llvm/trunk/lib/System/RWMutex.cpp

[Owen Anderson]

Author: resistor
Date: Fri Jun 19 19:32:27 2009
New Revision: 73806

URL: http://llvm.org/viewvc/llvm-project?rev=73806&view=rev
Log:
Workaround for an... interesting bug in Darwin's pthread_rwlock_init.

Modified:
    llvm/trunk/lib/System/RWMutex.cpp

Modified: llvm/trunk/lib/System/RWMutex.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/System/RWMutex.cpp?rev=73806&r1=73805&r2=73806&view=diff

==============================================================================
--- llvm/trunk/lib/System/RWMutex.cpp (original)
+++ llvm/trunk/lib/System/RWMutex.cpp Fri Jun 19 19:32:27 2009
@@ -13,6 +13,7 @@
 
 #include "llvm/Config/config.h"
 #include "llvm/System/RWMutex.h"
+#include <cstring>
 
 //===----------------------------------------------------------------------===//
 //=== WARNING: Implementation here must contain only TRULY operating system
@@ -64,6 +65,12 @@
     // Declare the pthread_rwlock data structures
     pthread_rwlock_t* rwlock =
       static_cast<pthread_rwlock_t*>(malloc(sizeof(pthread_rwlock_t)));
+
+#ifdef __APPLE__
+    // Workaround a bug/mis-feature in Darwin's pthread_rwlock_init.
+    bzero(rwlock, sizeof(pthread_rwlock_t));
+#endif
+
     pthread_rwlockattr_t attr;
 
     // Initialize the rwlock attributes