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- /*
- * Copyright (C) 2017 Hangzhou C-SKY Microsystems co.,ltd.
- *
- * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB
- * in this tarball.
- */
- #define _ERRNO_H 1
- #include <bits/errno.h>
- #include <sysdep.h>
- .text
- ENTRY (pthread_spin_trylock)
- mov a2, a0
- movi a0, 0
- movi a1, 1
- trap 2 // trap 2 use to cmpxchg
- cmpnei a0, 0
- bf 1f
- movi a0, EBUSY
- 1:
- jmp r15
- END (pthread_spin_trylock)
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