32 lines
814 B
C
32 lines
814 B
C
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#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#define ATOMIC_X86_COMPARE_EXCHANGE(TYPE, MODE, SUFFIX) \
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bool __atomic_compare_exchange_##MODE(_Atomic(TYPE) *atom, TYPE *ref, TYPE xchg) \
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{ \
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TYPE rv; \
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TYPE cmp = *ref; \
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asm volatile( \
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"lock cmpxchg" SUFFIX " %2,%1\n" \
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: "=a" (rv), "+m" (*atom) \
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: "q" (xchg), "0" (cmp) \
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: "memory" \
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); \
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*ref = rv; \
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return (rv == cmp); \
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}
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#define ATOMIC_X86_LOAD(TYPE, MODE) \
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TYPE __atomic_load_##MODE(const _Atomic(TYPE) *atom) \
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{ \
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return *(volatile TYPE *)atom; \
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}
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#define ATOMIC_X86_STORE(TYPE, MODE) \
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void __atomic_store_##MODE(_Atomic(TYPE) *atom, TYPE value) \
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{ \
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*(volatile TYPE *)atom = value; \
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}
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