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fa8ef6da1f
Atomic functions now return the original git-svn-id: file:///svn/toku/tokudb@18187 c7de825b-a66e-492c-adef-691d508d4ae1
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
#if !defined(TOKU_ATOMIC_H)
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#define TOKU_ATOMIC_H
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#if TOKU_WINDOWS
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static inline uint32_t
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toku_sync_fetch_and_add_uint32(volatile uint32_t *a, uint32_t b) {
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return _InterlockedExchangeAdd((LONG*)a, b);
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}
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static inline uint32_t
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toku_sync_fetch_and_increment_uint32(volatile uint32_t *a) {
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uint32_t r = _InterlockedIncrement((LONG*)a);
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//InterlockedIncrement returns the result, not original.
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//Return the original.
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return r - 1;
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}
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static inline uint32_t
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toku_sync_fetch_and_decrement_uint32(volatile uint32_t *a) {
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uint32_t r = _InterlockedDecrement((LONG*)a);
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//InterlockedDecrement returns the result, not original.
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//Return the original.
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return r + 1;
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}
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static inline int32_t
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toku_sync_fetch_and_add_int32(volatile int32_t *a, int32_t b) {
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return _InterlockedExchangeAdd((LONG*)a, b);
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}
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static inline int32_t
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toku_sync_fetch_and_increment_int32(volatile int32_t *a) {
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return _InterlockedIncrement((LONG*)a);
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}
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static inline int32_t
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toku_sync_fetch_and_decrement_int32(volatile int32_t *a) {
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return _InterlockedDecrement((LONG*)a);
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}
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#define TOKU_WINDOWS_MIN_SUPPORTED_IS_VISTA 0
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//Vista has 64 bit atomic instruction functions.
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//64 bit windows should also have it, but we're using neither right now.
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#if TOKU_WINDOWS_MIN_SUPPORTED_IS_VISTA || defined(_WIN64)
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#define TOKU_WINDOWS_HAS_ATOMIC_64 1
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#else
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#define TOKU_WINDOWS_HAS_ATOMIC_64 0
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#endif
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static inline uint64_t
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toku_sync_fetch_and_add_uint64(volatile uint64_t *a, uint64_t b) {
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#if TOKU_WINDOWS_HAS_ATOMIC_64
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return _InterlockedExchangeAdd64((int64_t*)a, b);
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#else
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//Temporarily just use 32 bit atomic instructions (treat the values as 32
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//bit only). For now this is ok, the values are only used in show engine
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//status.
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return toku_sync_fetch_and_add_uint32((uint32_t*)a, b);
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#endif
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}
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static inline uint64_t
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toku_sync_fetch_and_increment_uint64(volatile uint64_t *a) {
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#if TOKU_WINDOWS_HAS_ATOMIC_64
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uint64_t r = _InterlockedIncrement64((int64_t*)a);
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//InterlockedIncrement64 returns the result, not original.
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//Return the original.
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return r - 1;
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#else
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//Temporarily just use 32 bit atomic instructions (treat the values as 32
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//bit only). For now this is ok, the values are only used in show engine
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//status.
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return toku_sync_fetch_and_increment_uint32((uint32_t*)a);
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#endif
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}
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#else
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//Linux
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static inline uint32_t toku_sync_fetch_and_add_uint32(volatile uint32_t *a, uint32_t b) {
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return __sync_fetch_and_add(a, b);
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}
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static inline uint32_t toku_sync_fetch_and_increment_uint32(volatile uint32_t *a) {
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return toku_sync_fetch_and_add_uint32(a, 1);
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}
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static inline uint32_t toku_sync_fetch_and_decrement_uint32(volatile uint32_t *a) {
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return toku_sync_fetch_and_add_uint32(a, -1);
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}
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static inline int32_t toku_sync_fetch_and_add_int32(volatile int32_t *a, int32_t b) {
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return __sync_fetch_and_add(a, b);
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}
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static inline int32_t toku_sync_fetch_and_increment_int32(volatile int32_t *a) {
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return toku_sync_fetch_and_add_int32(a, 1);
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}
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static inline int32_t toku_sync_fetch_and_decrement_int32(volatile int32_t *a) {
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return toku_sync_fetch_and_add_int32(a, -1);
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}
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#if __GNUC__ && __i386__
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// workaround for a gcc 4.1.2 bug on 32 bit platforms.
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uint64_t toku_sync_fetch_and_add_uint64(volatile uint64_t *a, uint64_t b) __attribute__((noinline));
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#else
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static inline uint64_t toku_sync_fetch_and_add_uint64(volatile uint64_t *a, uint64_t b) {
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return __sync_fetch_and_add(a, b);
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}
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#endif
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static inline uint64_t toku_sync_fetch_and_increment_uint64(volatile uint64_t *a) {
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return toku_sync_fetch_and_add_uint64(a, 1);
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}
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#endif
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#endif
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