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497 | #ifndef ECB_MEMORY_FENCE |
497 | #ifndef ECB_MEMORY_FENCE |
498 | #if ECB_GCC_VERSION(2,5) |
498 | #if ECB_GCC_VERSION(2,5) |
499 | #if __x86 |
499 | #if __x86 |
500 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
500 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
501 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
501 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
502 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */ |
502 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
503 | #elif __amd64 |
503 | #elif __amd64 |
504 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
504 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
505 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
505 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
506 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") |
506 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") |
507 | #endif |
507 | #endif |
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511 | #ifndef ECB_MEMORY_FENCE |
511 | #ifndef ECB_MEMORY_FENCE |
512 | #if ECB_GCC_VERSION(4,4) |
512 | #if ECB_GCC_VERSION(4,4) |
513 | #define ECB_MEMORY_FENCE __sync_synchronize () |
513 | #define ECB_MEMORY_FENCE __sync_synchronize () |
514 | #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) |
514 | #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) |
515 | #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) |
515 | #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) |
516 | #elif _MSC_VER >= 1400 |
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517 | #define ECB_MEMORY_FENCE do { } while (0) |
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518 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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519 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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520 | #elif defined(_WIN32) && defined(MemoryBarrier) |
516 | #elif defined(_WIN32) && defined(MemoryBarrier) |
521 | #define ECB_MEMORY_FENCE MemoryBarrier () |
517 | #define ECB_MEMORY_FENCE MemoryBarrier () |
522 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
518 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
523 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
519 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
524 | #endif |
520 | #endif |