//===----------------------------------------------------------------------===//
#include "llvm/Support/Atomic.h"
-#include "llvm/Config/config.h"
+#include "llvm/Config/llvm-config.h"
using namespace llvm;
#undef MemoryFence
#endif
+#if defined(__GNUC__) || (defined(__IBMCPP__) && __IBMCPP__ >= 1210)
+#define GNU_ATOMICS
+#endif
+
void sys::MemoryFence() {
-#if LLVM_MULTITHREADED==0
+#if LLVM_HAS_ATOMICS == 0
return;
#else
-# if defined(__GNUC__)
+# if defined(GNU_ATOMICS)
__sync_synchronize();
# elif defined(_MSC_VER)
MemoryBarrier();
sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr,
sys::cas_flag new_value,
sys::cas_flag old_value) {
-#if LLVM_MULTITHREADED==0
+#if LLVM_HAS_ATOMICS == 0
sys::cas_flag result = *ptr;
if (result == old_value)
*ptr = new_value;
return result;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_val_compare_and_swap(ptr, old_value, new_value);
#elif defined(_MSC_VER)
return InterlockedCompareExchange(ptr, new_value, old_value);
}
sys::cas_flag sys::AtomicIncrement(volatile sys::cas_flag* ptr) {
-#if LLVM_MULTITHREADED==0
+#if LLVM_HAS_ATOMICS == 0
++(*ptr);
return *ptr;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_add_and_fetch(ptr, 1);
#elif defined(_MSC_VER)
return InterlockedIncrement(ptr);
}
sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) {
-#if LLVM_MULTITHREADED==0
+#if LLVM_HAS_ATOMICS == 0
--(*ptr);
return *ptr;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_sub_and_fetch(ptr, 1);
#elif defined(_MSC_VER)
return InterlockedDecrement(ptr);
}
sys::cas_flag sys::AtomicAdd(volatile sys::cas_flag* ptr, sys::cas_flag val) {
-#if LLVM_MULTITHREADED==0
+#if LLVM_HAS_ATOMICS == 0
*ptr += val;
return *ptr;
-#elif defined(__GNUC__)
+#elif defined(GNU_ATOMICS)
return __sync_add_and_fetch(ptr, val);
#elif defined(_MSC_VER)
return InterlockedExchangeAdd(ptr, val) + val;