kolibrios-fun/contrib/sdk/sources/libsync/m_try.asm
Sergey Semyonov (Serge) 1918b713af newlib: struct dirent
pixlib3: enable linear texture filtration
libsync: user space synchronization

git-svn-id: svn://kolibrios.org@5602 a494cfbc-eb01-0410-851d-a64ba20cac60
2015-07-23 10:10:52 +00:00

18 lines
324 B
NASM

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