18 lines
324 B
NASM
18 lines
324 B
NASM
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format MS COFF
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use32
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MUTEX.lock equ 0
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MUTEX.handle equ 4
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section '.text' align 16 code readable executable
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public @mutex_trylock@4
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@mutex_trylock@4:
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mov edx, 1
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xor eax, eax
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lock cmpxchg [ecx+MUTEX.lock], edx
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setz al
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movzx eax, al
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ret
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