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552 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
552 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
553 | #elif __amd64 |
553 | #elif __amd64 |
554 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
554 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
555 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
555 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
556 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
556 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
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557 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
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558 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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559 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
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560 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \ |
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561 | || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
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562 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
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563 | #define ECB_MEMORY_FENCE \ |
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564 | do { \ |
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565 | int null = 0; \ |
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566 | __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \ |
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567 | while (0) |
557 | #endif |
568 | #endif |
558 | #endif |
569 | #endif |
559 | #endif |
570 | #endif |
560 | |
571 | |
561 | #ifndef ECB_MEMORY_FENCE |
572 | #ifndef ECB_MEMORY_FENCE |
562 | #if ECB_GCC_VERSION(4,4) |
573 | #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) |
563 | #define ECB_MEMORY_FENCE __sync_synchronize () |
574 | #define ECB_MEMORY_FENCE __sync_synchronize () |
564 | #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) |
575 | /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ |
565 | #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) |
576 | /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ |
566 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
577 | #elif _MSC_VER >= 1400 /* VC++ 2005 */ |
567 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
578 | #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) |
568 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
579 | #define ECB_MEMORY_FENCE _ReadWriteBarrier () |
569 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
580 | #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ |
570 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
581 | #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () |
571 | #elif defined(_WIN32) |
582 | #elif defined(_WIN32) |
572 | #include <WinNT.h> |
583 | #include <WinNT.h> |
573 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
584 | #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ |
574 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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575 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
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576 | #endif |
585 | #endif |
577 | #endif |
586 | #endif |
578 | |
587 | |
579 | #ifndef ECB_MEMORY_FENCE |
588 | #ifndef ECB_MEMORY_FENCE |
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589 | #if !ECB_AVOID_PTHREADS |
580 | /* |
590 | /* |
581 | * if you get undefined symbol references to pthread_mutex_lock, |
591 | * if you get undefined symbol references to pthread_mutex_lock, |
582 | * or failure to find pthread.h, then you should implement |
592 | * or failure to find pthread.h, then you should implement |
583 | * the ECB_MEMORY_FENCE operations for your cpu/compiler |
593 | * the ECB_MEMORY_FENCE operations for your cpu/compiler |
584 | * OR provide pthread.h and link against the posix thread library |
594 | * OR provide pthread.h and link against the posix thread library |
585 | * of your system. |
595 | * of your system. |
586 | */ |
596 | */ |
587 | #include <pthread.h> |
597 | #include <pthread.h> |
588 | #define ECB_NEEDS_PTHREADS 1 |
598 | #define ECB_NEEDS_PTHREADS 1 |
589 | #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
599 | #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1 |
590 | |
600 | |
591 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
601 | static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; |
592 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
602 | #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) |
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603 | #endif |
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604 | #endif |
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605 | |
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606 | #if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE) |
593 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
607 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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608 | #endif |
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609 | |
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610 | #if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE) |
594 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
611 | #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
595 | #endif |
612 | #endif |
596 | |
613 | |
597 | /*****************************************************************************/ |
614 | /*****************************************************************************/ |
598 | |
615 | |
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845 | #endif |
862 | #endif |
846 | |
863 | |
847 | #endif |
864 | #endif |
848 | |
865 | |
849 | /* ECB.H END */ |
866 | /* ECB.H END */ |
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867 | |
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868 | #if ECB_MEMORY_FENCE_NEEDS_PTHREADS |
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869 | # undef ECB_MEMORY_FENCE |
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870 | # undef ECB_MEMORY_FENCE_ACQUIRE |
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871 | # undef ECB_MEMORY_FENCE_RELEASE |
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872 | #endif |
850 | |
873 | |
851 | #define expect_false(cond) ecb_expect_false (cond) |
874 | #define expect_false(cond) ecb_expect_false (cond) |
852 | #define expect_true(cond) ecb_expect_true (cond) |
875 | #define expect_true(cond) ecb_expect_true (cond) |
853 | #define noinline ecb_noinline |
876 | #define noinline ecb_noinline |
854 | |
877 | |
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1754 | |
1777 | |
1755 | if (pipe_write_wanted) |
1778 | if (pipe_write_wanted) |
1756 | { |
1779 | { |
1757 | int old_errno; |
1780 | int old_errno; |
1758 | |
1781 | |
1759 | pipe_write_skipped = 0; /* just an optimsiation, no fence needed */ |
1782 | pipe_write_skipped = 0; /* just an optimisation, no fence needed */ |
1760 | |
1783 | |
1761 | old_errno = errno; /* save errno because write will clobber it */ |
1784 | old_errno = errno; /* save errno because write will clobber it */ |
1762 | |
1785 | |
1763 | #if EV_USE_EVENTFD |
1786 | #if EV_USE_EVENTFD |
1764 | if (evfd >= 0) |
1787 | if (evfd >= 0) |