123dcfaec5
Older versions of GCC (<4.9) and LLVM (<3.6) do not have __atomic_load_n which is part of the C11 standard. Fix by falling back to __sync_fetch_and_add with a value of 0 when __atomic_load_n is not available. Fixes #423 Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
42 lines
836 B
C
42 lines
836 B
C
#ifndef TREE_SITTER_ATOMIC_H_
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#define TREE_SITTER_ATOMIC_H_
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#include <stdint.h>
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#ifdef _WIN32
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#include <windows.h>
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static inline size_t atomic_load(const volatile size_t *p) {
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return *p;
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}
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static inline uint32_t atomic_inc(volatile uint32_t *p) {
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return InterlockedIncrement(p);
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}
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static inline uint32_t atomic_dec(volatile uint32_t *p) {
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return InterlockedDecrement(p);
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}
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#else
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static inline size_t atomic_load(const volatile size_t *p) {
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#ifdef __ATOMIC_RELAXED
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return __atomic_load_n(p, __ATOMIC_RELAXED);
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#else
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return __sync_fetch_and_add((volatile size_t *)p, 0);
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#endif
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}
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static inline uint32_t atomic_inc(volatile uint32_t *p) {
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return __sync_add_and_fetch(p, 1u);
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}
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static inline uint32_t atomic_dec(volatile uint32_t *p) {
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return __sync_sub_and_fetch(p, 1u);
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}
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#endif
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#endif // TREE_SITTER_ATOMIC_H_
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