HAVE_GCC_ATOMICS covers the test and set
authorSam Lantinga <slouken@libsdl.org>
Fri, 21 Jan 2011 21:45:55 -0800
changeset 5071 55ff76cdbbb8
parent 5070 042ad5e274ed
child 5072 2341ecc03388
HAVE_GCC_ATOMICS covers the test and set
configure.in
include/SDL_config_iphoneos.h
src/atomic/SDL_spinlock.c
--- a/configure.in	Fri Jan 21 21:43:56 2011 -0800
+++ b/configure.in	Fri Jan 21 21:45:55 2011 -0800
@@ -311,18 +311,18 @@
 
     if test x$have_gcc_atomics = xyes; then
         AC_DEFINE(HAVE_GCC_ATOMICS)
-    fi
-
-    # See if we have the minimum operation needed for GCC atomics
-    AC_TRY_LINK([
-    ],[
-    int a;
-    __sync_lock_test_and_set(&a, 1);
-    ],[
-    have_gcc_sync_lock_test_and_set=yes
-    ])
-    if test x$have_gcc_sync_lock_test_and_set = xyes; then
-        AC_DEFINE(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
+    else
+        # See if we have the minimum operation needed for GCC atomics
+        AC_TRY_LINK([
+        ],[
+        int a;
+        __sync_lock_test_and_set(&a, 1);
+        ],[
+        have_gcc_sync_lock_test_and_set=yes
+        ])
+        if test x$have_gcc_sync_lock_test_and_set = xyes; then
+            AC_DEFINE(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
+        fi
     fi
 fi
 
--- a/include/SDL_config_iphoneos.h	Fri Jan 21 21:43:56 2011 -0800
+++ b/include/SDL_config_iphoneos.h	Fri Jan 21 21:45:55 2011 -0800
@@ -44,7 +44,6 @@
 #define SDL_HAS_64BIT_TYPE	1
 
 #define HAVE_GCC_ATOMICS	1
-#define HAVE_GCC_SYNC_LOCK_TEST_AND_SET	1
 
 #define HAVE_ALLOCA_H		1
 #define HAVE_SYS_TYPES_H	1
--- a/src/atomic/SDL_spinlock.c	Fri Jan 21 21:43:56 2011 -0800
+++ b/src/atomic/SDL_spinlock.c	Fri Jan 21 21:45:55 2011 -0800
@@ -36,7 +36,7 @@
 #elif defined(__MACOSX__)
     return OSAtomicCompareAndSwap32Barrier(0, 1, lock);
 
-#elif defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
+#elif defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
     return (__sync_lock_test_and_set(lock, 1) == 0);
 
 #elif defined(__GNUC__) && defined(__arm__) && defined(__ARM_ARCH_5__)