musl/src/thread/pthread_spin_trylock.c

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#include "pthread_impl.h"

int pthread_spin_trylock(pthread_spinlock_t *s)
{
	if (*s || a_xchg(s, 1)) return EBUSY;
	return 0;
}
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include "pthread_impl.h"`

			`int pthread_spin_trylock(pthread_spinlock_t *s)`
			`{`
optimize contended case for pthread_spin_trylock 2011-03-24 23:06:08 -04:00			`if (*s \|\| a_xchg(s, 1)) return EBUSY;`
			`return 0;`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`}`