| /* util.h */ |
| #ifndef UTIL_H |
| #define UTIL_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #if (defined(__GNUC__) && __GNUC__ >= 4 && (__GNUC__ > 4 || __GNUC_MINOR__ >= 1) \ |
| && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) \ |
| || (defined(__INTEL_COMPILER) && !defined(_WIN32)) |
| /* atomic operations are defined by ICC and GCC >= 4.1, but by the later one supposedly not for ARM */ |
| /* note: ICC on ia64 platform possibly require ia64intrin.h, need testing */ |
| # define atomic_compare_and_swap(ptr, oldval, newval) __sync_val_compare_and_swap(ptr, oldval, newval) |
| #elif defined(_MSC_VER) |
| # include <windows.h> |
| # define atomic_compare_and_swap(ptr, oldval, newval) InterlockedCompareExchange(ptr, newval, oldval) |
| #elif defined(__sun) |
| # include <atomic.h> |
| # define atomic_compare_and_swap(ptr, oldval, newval) atomic_cas_32(ptr, oldval, newval) |
| #else |
| /* pray that it will work */ |
| # define atomic_compare_and_swap(ptr, oldval, newval) { if(*(ptr) == (oldval)) *(ptr) = (newval); } |
| # define NO_ATOMIC_BUILTINS |
| #endif |
| |
| #ifdef __cplusplus |
| } /* extern "C" */ |
| #endif /* __cplusplus */ |
| |
| #endif /* UTIL_H */ |
