Use clang's c11_atomic builtins instead of the older gcc extensions

dgrove-oss · dgrove-oss · commit e5055544c50d · 2015-12-17T14:10:20.000Z
to implement the handful of atomic operations used in test cases.
diff --git a/tests/linux_port.h b/tests/linux_port.h
@@ -4,19 +4,19 @@
 static inline int32_t
 OSAtomicIncrement32(volatile int32_t *var)
 {
-    return __sync_add_and_fetch(var,1);
+  return __c11_atomic_fetch_add((_Atomic(int)*)var, 1, __ATOMIC_RELAXED)+1;
 }
 
 static inline int32_t
 OSAtomicIncrement32Barrier(volatile int32_t *var)
 {
-    return __sync_add_and_fetch(var,1);
+    return __c11_atomic_fetch_add((_Atomic(int)*)var, 1, __ATOMIC_SEQ_CST)+1;
 }
 
 static inline int32_t
 OSAtomicAdd32(volatile int32_t *var, int32_t val)
 {
-    return __sync_add_and_fetch(var,val);
+    return __c11_atomic_fetch_add((_Atomic(int)*)var, val, __ATOMIC_RELAXED)+val;
 }
 
 // Simulation of mach_absolute_time related infrastructure

Original file line number	Diff line number	Diff line change
`@@ -4,19 +4,19 @@`
`4`	`4`	`static inline int32_t`
`5`	`5`	`OSAtomicIncrement32(volatile int32_t *var)`
`6`	`6`	`{`
`7`		`- return __sync_add_and_fetch(var,1);`
	`7`	`+ return __c11_atomic_fetch_add((_Atomic(int)*)var, 1, __ATOMIC_RELAXED)+1;`
`8`	`8`	`}`
`9`	`9`
`10`	`10`	`static inline int32_t`
`11`	`11`	`OSAtomicIncrement32Barrier(volatile int32_t *var)`
`12`	`12`	`{`
`13`		`- return __sync_add_and_fetch(var,1);`
	`13`	`+ return __c11_atomic_fetch_add((_Atomic(int)*)var, 1, __ATOMIC_SEQ_CST)+1;`
`14`	`14`	`}`
`15`	`15`
`16`	`16`	`static inline int32_t`
`17`	`17`	`OSAtomicAdd32(volatile int32_t *var, int32_t val)`
`18`	`18`	`{`
`19`		`- return __sync_add_and_fetch(var,val);`
	`19`	`+ return __c11_atomic_fetch_add((_Atomic(int)*)var, val, __ATOMIC_RELAXED)+val;`
`20`	`20`	`}`
`21`	`21`
`22`	`22`	`// Simulation of mach_absolute_time related infrastructure`