kolibrios/contrib/sdk/sources/libsync/m_try.asm

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