| … | |
… | |
| 568 | |
568 | |
| 569 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
569 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
| 570 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
570 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
| 571 | |
571 | |
| 572 | #if ECB_NO_THREADS |
572 | #if ECB_NO_THREADS |
| 573 | # define ECB_NO_SMP 1 |
573 | #define ECB_NO_SMP 1 |
| 574 | #endif |
574 | #endif |
| 575 | |
575 | |
| 576 | #if ECB_NO_SMP |
576 | #if ECB_NO_SMP |
| 577 | #define ECB_MEMORY_FENCE do { } while (0) |
577 | #define ECB_MEMORY_FENCE do { } while (0) |
| 578 | #endif |
578 | #endif |
| … | |
… | |
| 621 | #elif defined __clang && __has_feature (cxx_atomic) |
621 | #elif defined __clang && __has_feature (cxx_atomic) |
| 622 | /* see above */ |
622 | /* see above */ |
| 623 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
623 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
| 624 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
624 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
| 625 | #define ECB_MEMORY_FENCE __sync_synchronize () |
625 | #define ECB_MEMORY_FENCE __sync_synchronize () |
| 626 | /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ |
|
|
| 627 | /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ |
|
|
| 628 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
626 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
| 629 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
627 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
| 630 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
628 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
| 631 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
629 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
| 632 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
630 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
| … | |
… | |
| 649 | /* not just C11 atomics and atomic accesses */ |
647 | /* not just C11 atomics and atomic accesses */ |
| 650 | #include <stdatomic.h> |
648 | #include <stdatomic.h> |
| 651 | /* unfortunately, the C11 memory model seems to be very limited, and unable to express */ |
649 | /* unfortunately, the C11 memory model seems to be very limited, and unable to express */ |
| 652 | /* simple barrier semantics. That means we need to take out thor's hammer. */ |
650 | /* simple barrier semantics. That means we need to take out thor's hammer. */ |
| 653 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
651 | #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) |
| 654 | #endif |
|
|
| 655 | #endif |
652 | #endif |
| 656 | #endif |
653 | #endif |
| 657 | |
654 | |
| 658 | #ifndef ECB_MEMORY_FENCE |
655 | #ifndef ECB_MEMORY_FENCE |
| 659 | #if !ECB_AVOID_PTHREADS |
656 | #if !ECB_AVOID_PTHREADS |
