Author: zarzycki
Date: Thu Mar 15 03:58:08 2012
New Revision: 152786
URL: http://llvm.org/viewvc/llvm-project?rev=152786&view=rev
Log:
Less lame "concurrency" support
These APIs aren't thread safe, but they're pretending to be. Let's at
least make the getter as fast as they can be. The setters are a lost
cause unless the API can be fixed.
Modified:
libcxxabi/trunk/src/cxa_default_handlers.cpp
libcxxabi/trunk/src/cxa_handlers.cpp
Modified: libcxxabi/trunk/src/cxa_default_handlers.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxxabi/trunk/src/cxa_default_handlers.cpp?rev=152786&r1=152785&r2=152786&view=diff
==============================================================================
--- libcxxabi/trunk/src/cxa_default_handlers.cpp (original)
+++ libcxxabi/trunk/src/cxa_default_handlers.cpp Thu Mar 15 03:58:08 2012
@@ -103,7 +103,7 @@
{
if (func == 0)
func = default_unexpected_handler;
- return
__sync_lock_test_and_set(&__cxxabiapple::__cxa_unexpected_handler, func);
+ return __sync_swap(&__cxxabiapple::__cxa_unexpected_handler, func);
}
terminate_handler
@@ -111,7 +111,7 @@
{
if (func == 0)
func = default_terminate_handler;
- return
__sync_lock_test_and_set(&__cxxabiapple::__cxa_terminate_handler, func);
+ return __sync_swap(&__cxxabiapple::__cxa_terminate_handler, func);
}
};
Modified: libcxxabi/trunk/src/cxa_handlers.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxxabi/trunk/src/cxa_handlers.cpp?rev=152786&r1=152785&r2=152786&view=diff
==============================================================================
--- libcxxabi/trunk/src/cxa_handlers.cpp (original)
+++ libcxxabi/trunk/src/cxa_handlers.cpp Thu Mar 15 03:58:08 2012
@@ -28,7 +28,7 @@
unexpected_handler
get_unexpected() _NOEXCEPT
{
- return __sync_fetch_and_add(&__cxxabiapple::__cxa_unexpected_handler,
(unexpected_handler)0);
+ return __cxxabiapple::__cxa_unexpected_handler;
}
__attribute__((visibility("hidden"), noreturn))
@@ -50,7 +50,7 @@
terminate_handler
get_terminate() _NOEXCEPT
{
- return __sync_fetch_and_add(&__cxxabiapple::__cxa_terminate_handler,
(terminate_handler)0);
+ return __cxxabiapple::__cxa_terminate_handler;
}
__attribute__((visibility("hidden"), noreturn))
@@ -101,13 +101,13 @@
new_handler
set_new_handler(new_handler handler) _NOEXCEPT
{
- return __sync_lock_test_and_set(&__cxxabiapple::__cxa_new_handler,
handler);
+ return __sync_swap(&__cxxabiapple::__cxa_new_handler, handler);
}
new_handler
get_new_handler() _NOEXCEPT
{
- return __sync_fetch_and_add(&__cxxabiapple::__cxa_new_handler,
(new_handler)0);
+ return __cxxabiapple::__cxa_new_handler;
}
} // std
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