[libcxx] r177212 - This should be nothing but a load-time optimization. I'm trying to reduce load time initializers and this is a big one. No visible functionality change intended.

[Howard Hinnant]

Author: hhinnant
Date: Fri Mar 15 19:17:53 2013
New Revision: 177212

URL: http://llvm.org/viewvc/llvm-project?rev=177212&view=rev
Log:
This should be nothing but a load-time optimization.  I'm trying to reduce load 
time initializers and this is a big one.  No visible functionality change 
intended.

Modified:
    libcxx/trunk/src/memory.cpp

Modified: libcxx/trunk/src/memory.cpp
URL: 
http://llvm.org/viewvc/llvm-project/libcxx/trunk/src/memory.cpp?rev=177212&r1=177211&r2=177212&view=diff
==============================================================================
--- libcxx/trunk/src/memory.cpp (original)
+++ libcxx/trunk/src/memory.cpp Fri Mar 15 19:17:53 2013
@@ -122,7 +122,15 @@ __shared_weak_count::__get_deleter(const
 #if __has_feature(cxx_atomic)
 
 static const std::size_t __sp_mut_count = 16;
-static mutex mut_back[__sp_mut_count];
+static pthread_mutex_t mut_back_imp[__sp_mut_count] =
+{
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 
PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 
PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 
PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER,
+    PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 
PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER
+};
+
+static mutex* mut_back = reinterpret_cast<std::mutex*>(mut_back_imp);
 
 _LIBCPP_CONSTEXPR __sp_mut::__sp_mut(void* p) _NOEXCEPT
    : __lx(p)


_______________________________________________
cfe-commits mailing list
cfe-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits