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https://github.com/isar/libmdbx.git
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mdbx: refine visibility of internal mdbx_osal_jitter().
This commit is contained in:
Leonid Yuriev
parent
c456625ef2
commit
0c3a5da3cb
64
src/core.c
64
src/core.c
@ -823,6 +823,70 @@ size_t __hot mdbx_e2k_strnlen_bug_workaround(const char *s, size_t maxlen) {
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/*------------------------------------------------------------------------------
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* safe read/write volatile 64-bit fields on 32-bit architectures. */
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MDBX_MAYBE_UNUSED static __always_inline uint64_t
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atomic_store64(MDBX_atomic_uint64_t *p, const uint64_t value,
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enum MDBX_memory_order order) {
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STATIC_ASSERT(sizeof(MDBX_atomic_uint64_t) == 8);
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#if MDBX_64BIT_ATOMIC
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#ifdef MDBX_HAVE_C11ATOMICS
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assert(atomic_is_lock_free(MDBX_c11a_rw(uint64_t, p)));
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atomic_store_explicit(MDBX_c11a_rw(uint64_t, p), value, mo_c11_store(order));
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#else /* MDBX_HAVE_C11ATOMICS */
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if (order != mo_Relaxed)
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mdbx_compiler_barrier();
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p->weak = value;
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mdbx_memory_fence(order, true);
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#endif /* MDBX_HAVE_C11ATOMICS */
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#else /* !MDBX_64BIT_ATOMIC */
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mdbx_compiler_barrier();
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atomic_store32(&p->low, (uint32_t)value, mo_Relaxed);
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mdbx_jitter4testing(true);
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atomic_store32(&p->high, (uint32_t)(value >> 32), order);
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mdbx_jitter4testing(true);
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#endif /* !MDBX_64BIT_ATOMIC */
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return value;
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}
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MDBX_MAYBE_UNUSED static
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#if MDBX_64BIT_ATOMIC
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__always_inline
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#endif /* MDBX_64BIT_ATOMIC */
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uint64_t
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atomic_load64(const MDBX_atomic_uint64_t *p,
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enum MDBX_memory_order order) {
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STATIC_ASSERT(sizeof(MDBX_atomic_uint64_t) == 8);
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#if MDBX_64BIT_ATOMIC
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#ifdef MDBX_HAVE_C11ATOMICS
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assert(atomic_is_lock_free(MDBX_c11a_ro(uint64_t, p)));
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return atomic_load_explicit(MDBX_c11a_ro(uint64_t, p), mo_c11_load(order));
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#else /* MDBX_HAVE_C11ATOMICS */
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mdbx_memory_fence(order, false);
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const uint64_t value = p->weak;
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if (order != mo_Relaxed)
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mdbx_compiler_barrier();
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return value;
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#endif /* MDBX_HAVE_C11ATOMICS */
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#else /* !MDBX_64BIT_ATOMIC */
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mdbx_compiler_barrier();
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uint64_t value = (uint64_t)atomic_load32(&p->high, order) << 32;
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mdbx_jitter4testing(true);
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value |= atomic_load32(&p->low, (order == mo_Relaxed) ? mo_Relaxed
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: mo_AcquireRelease);
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mdbx_jitter4testing(true);
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for (;;) {
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mdbx_compiler_barrier();
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uint64_t again = (uint64_t)atomic_load32(&p->high, order) << 32;
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mdbx_jitter4testing(true);
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again |= atomic_load32(&p->low, (order == mo_Relaxed) ? mo_Relaxed
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: mo_AcquireRelease);
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mdbx_jitter4testing(true);
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if (likely(value == again))
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return value;
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value = again;
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}
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#endif /* !MDBX_64BIT_ATOMIC */
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}
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static __always_inline void atomic_yield(void) {
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#if defined(_WIN32) || defined(_WIN64)
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YieldProcessor();
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@ -264,8 +264,6 @@ static __always_inline memory_order mo_c11_load(enum MDBX_memory_order fence) {
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#ifndef __cplusplus
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static __inline void mdbx_jitter4testing(bool tiny);
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MDBX_MAYBE_UNUSED static __always_inline void
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mdbx_memory_fence(enum MDBX_memory_order order, bool write) {
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#ifdef MDBX_HAVE_C11ATOMICS
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@ -309,70 +307,6 @@ atomic_load32(const MDBX_atomic_uint32_t *p, enum MDBX_memory_order order) {
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#endif /* MDBX_HAVE_C11ATOMICS */
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}
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MDBX_MAYBE_UNUSED static __always_inline uint64_t
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atomic_store64(MDBX_atomic_uint64_t *p, const uint64_t value,
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enum MDBX_memory_order order) {
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STATIC_ASSERT(sizeof(MDBX_atomic_uint64_t) == 8);
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#if MDBX_64BIT_ATOMIC
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#ifdef MDBX_HAVE_C11ATOMICS
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assert(atomic_is_lock_free(MDBX_c11a_rw(uint64_t, p)));
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atomic_store_explicit(MDBX_c11a_rw(uint64_t, p), value, mo_c11_store(order));
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#else /* MDBX_HAVE_C11ATOMICS */
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if (order != mo_Relaxed)
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mdbx_compiler_barrier();
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p->weak = value;
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mdbx_memory_fence(order, true);
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#endif /* MDBX_HAVE_C11ATOMICS */
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#else /* !MDBX_64BIT_ATOMIC */
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mdbx_compiler_barrier();
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atomic_store32(&p->low, (uint32_t)value, mo_Relaxed);
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mdbx_jitter4testing(true);
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atomic_store32(&p->high, (uint32_t)(value >> 32), order);
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mdbx_jitter4testing(true);
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#endif /* !MDBX_64BIT_ATOMIC */
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return value;
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}
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MDBX_MAYBE_UNUSED static
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#if MDBX_64BIT_ATOMIC
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__always_inline
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#endif /* MDBX_64BIT_ATOMIC */
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uint64_t
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atomic_load64(const MDBX_atomic_uint64_t *p,
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enum MDBX_memory_order order) {
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STATIC_ASSERT(sizeof(MDBX_atomic_uint64_t) == 8);
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#if MDBX_64BIT_ATOMIC
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#ifdef MDBX_HAVE_C11ATOMICS
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assert(atomic_is_lock_free(MDBX_c11a_ro(uint64_t, p)));
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return atomic_load_explicit(MDBX_c11a_ro(uint64_t, p), mo_c11_load(order));
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#else /* MDBX_HAVE_C11ATOMICS */
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mdbx_memory_fence(order, false);
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const uint64_t value = p->weak;
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if (order != mo_Relaxed)
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mdbx_compiler_barrier();
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return value;
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#endif /* MDBX_HAVE_C11ATOMICS */
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#else /* !MDBX_64BIT_ATOMIC */
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mdbx_compiler_barrier();
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uint64_t value = (uint64_t)atomic_load32(&p->high, order) << 32;
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mdbx_jitter4testing(true);
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value |= atomic_load32(&p->low, (order == mo_Relaxed) ? mo_Relaxed
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: mo_AcquireRelease);
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mdbx_jitter4testing(true);
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for (;;) {
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mdbx_compiler_barrier();
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uint64_t again = (uint64_t)atomic_load32(&p->high, order) << 32;
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mdbx_jitter4testing(true);
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again |= atomic_load32(&p->low, (order == mo_Relaxed) ? mo_Relaxed
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: mo_AcquireRelease);
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mdbx_jitter4testing(true);
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if (likely(value == again))
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return value;
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value = again;
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}
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#endif /* !MDBX_64BIT_ATOMIC */
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}
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#endif /* !__cplusplus */
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/*----------------------------------------------------------------------------*/
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@ -1426,15 +1360,6 @@ MDBX_INTERNAL_FUNC void mdbx_rthc_global_init(void);
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MDBX_INTERNAL_FUNC void mdbx_rthc_global_dtor(void);
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MDBX_INTERNAL_FUNC void mdbx_rthc_thread_dtor(void *ptr);
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MDBX_MAYBE_UNUSED static __inline void mdbx_jitter4testing(bool tiny) {
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#if MDBX_DEBUG
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if (MDBX_DBG_JITTER & mdbx_runtime_flags)
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mdbx_osal_jitter(tiny);
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#else
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(void)tiny;
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#endif
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}
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#endif /* !__cplusplus */
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#define MDBX_IS_ERROR(rc) \
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14
src/osal.h
14
src/osal.h
@ -481,9 +481,18 @@ typedef union MDBX_srwlock {
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} MDBX_srwlock;
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#endif /* Windows */
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#ifdef __cplusplus
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extern void mdbx_osal_jitter(bool tiny);
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#ifndef __cplusplus
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MDBX_MAYBE_UNUSED MDBX_INTERNAL_FUNC void mdbx_osal_jitter(bool tiny);
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MDBX_MAYBE_UNUSED static __inline void mdbx_jitter4testing(bool tiny) {
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#if MDBX_DEBUG
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if (MDBX_DBG_JITTER & mdbx_runtime_flags)
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mdbx_osal_jitter(tiny);
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#else
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(void)tiny;
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#endif
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}
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/*----------------------------------------------------------------------------*/
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/* Atomics */
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@ -735,7 +744,6 @@ MDBX_MAYBE_UNUSED static __inline uintptr_t mdbx_thread_self(void) {
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return (uintptr_t)thunk;
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}
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MDBX_MAYBE_UNUSED MDBX_INTERNAL_FUNC void mdbx_osal_jitter(bool tiny);
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MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void);
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MDBX_INTERNAL_FUNC uint64_t
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mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16);
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