| INCLUDE(CheckCXXSourceRuns) |
| |
| MACRO ( CHECK_HAVE_GCC_ATOMIC_FUNCTIONS result ) |
| |
| # Do step by step checking, |
| CHECK_CXX_SOURCE_RUNS(" |
| #include <cstdlib> |
| int main() |
| { |
| unsigned value = 0; |
| void* ptr = &value; |
| __sync_add_and_fetch(&value, 1); |
| __sync_synchronize(); |
| __sync_sub_and_fetch(&value, 1); |
| if (!__sync_bool_compare_and_swap(&value, 0, 1)) |
| return EXIT_FAILURE; |
| |
| if (!__sync_bool_compare_and_swap(&ptr, ptr, ptr)) |
| return EXIT_FAILURE; |
| |
| return EXIT_SUCCESS; |
| } |
| " ${result} ) |
| |
| ENDMACRO ( CHECK_HAVE_GCC_ATOMIC_FUNCTIONS result ) |
