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Diffstat (limited to 'cmake/modules/CheckAtomic.cmake')
| -rw-r--r-- | cmake/modules/CheckAtomic.cmake | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/cmake/modules/CheckAtomic.cmake b/cmake/modules/CheckAtomic.cmake index 27bbaba699..6c4da66bfa 100644 --- a/cmake/modules/CheckAtomic.cmake +++ b/cmake/modules/CheckAtomic.cmake @@ -1,14 +1,26 @@ # atomic builtins are required for threading support. INCLUDE(CheckCXXSourceCompiles) + +#ifdef _MSC_VER +#include <windows.h> +#endif CHECK_CXX_SOURCE_COMPILES(" int main() { +#ifdef _MSC_VER + volatile LONG val = 1; + MemoryBarrier(); + InterlockedCompareExchange(&val, 0, 1); + InterlockedIncrement(&val); + InterlockedDecrement(&val); +#else volatile unsigned long val = 1; __sync_synchronize(); __sync_val_compare_and_swap(&val, 1, 0); __sync_add_and_fetch(&val, 1); __sync_sub_and_fetch(&val, 1); +#endif return 0; } " LLVM_MULTITHREADED) |