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- /*
- * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
- *
- * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
- */
- #include <sysdep.h>
- #define _ERRNO_H 1
- #include <bits/errno.h>
- ; int pthread_spin_trylock(pthread_spinlock_t *lock)
- ; Return EBUSY is already locked, 0 if not
- ENTRY(pthread_spin_trylock)
- mov_s r1, 1
- ex r1, [r0]
- tst r1, r1
- mov.z r0, 0
- j.d [blink]
- mov.nz r0, EBUSY
- ; slightly faster, but difficult to follow
- ; mov_s r1, r0
- ; mov_s r0, 1
- ; ex r0, [r1]
- ; tst r0, r0
- ; j.d [blink]
- ; mov.nz r0, EBUSY
- END(pthread_spin_trylock)
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