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537 | |
537 | |
538 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
538 | /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ |
539 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
539 | /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ |
540 | |
540 | |
541 | #if ECB_NO_THREADS || ECB_NO_SMP |
541 | #if ECB_NO_THREADS || ECB_NO_SMP |
542 | #define ECB_MEMORY_FENCE do { } while (0) |
542 | #define ECB_MEMORY_FENCE do { } while (0) |
543 | #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0) |
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544 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) |
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545 | #endif |
543 | #endif |
546 | |
544 | |
547 | #ifndef ECB_MEMORY_FENCE |
545 | #ifndef ECB_MEMORY_FENCE |
548 | #if ECB_GCC_VERSION(2,5) |
546 | #if ECB_GCC_VERSION(2,5) |
549 | #if __x86 |
547 | #if __i386__ |
550 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
548 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
551 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ |
549 | #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ |
552 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
550 | #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ |
553 | #elif __amd64 |
551 | #elif __amd64 |
554 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
552 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
555 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") |
553 | #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 */ |
554 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ |
557 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
555 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
558 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
556 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
559 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
557 | #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ |
560 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \ |
558 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) |
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559 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
561 | || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
560 | #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ |
562 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
561 | || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) |
563 | #define ECB_MEMORY_FENCE \ |
562 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
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) |
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568 | #endif |
563 | #endif |
569 | #endif |
564 | #endif |
570 | #endif |
565 | #endif |
571 | |
566 | |
572 | #ifndef ECB_MEMORY_FENCE |
567 | #ifndef ECB_MEMORY_FENCE |
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864 | #endif |
859 | #endif |
865 | |
860 | |
866 | /* ECB.H END */ |
861 | /* ECB.H END */ |
867 | |
862 | |
868 | #if ECB_MEMORY_FENCE_NEEDS_PTHREADS |
863 | #if ECB_MEMORY_FENCE_NEEDS_PTHREADS |
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864 | /* if your architetcure doesn't need memory fences, e.g. because it is |
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865 | * single-cpu/core, or if you use libev in a project that doesn't use libev |
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866 | * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling |
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867 | * libev, in which casess the memory fences become nops. |
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868 | * alternatively, you can remove this #error and link against libpthread, |
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869 | * which will then provide the memory fences. |
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870 | */ |
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871 | # error "memory fences not defined for your architecture, please report" |
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872 | #endif |
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873 | |
869 | # undef ECB_MEMORY_FENCE |
874 | #ifndef ECB_MEMORY_FENCE |
870 | # undef ECB_MEMORY_FENCE_ACQUIRE |
875 | # define ECB_MEMORY_FENCE do { } while (0) |
871 | # undef ECB_MEMORY_FENCE_RELEASE |
876 | # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE |
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877 | # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE |
872 | #endif |
878 | #endif |
873 | |
879 | |
874 | #define expect_false(cond) ecb_expect_false (cond) |
880 | #define expect_false(cond) ecb_expect_false (cond) |
875 | #define expect_true(cond) ecb_expect_true (cond) |
881 | #define expect_true(cond) ecb_expect_true (cond) |
876 | #define noinline ecb_noinline |
882 | #define noinline ecb_noinline |