fusl/src/thread/sem_trywait.c - Issue 1573973002: Add a "fork" of musl as //fusl.

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Side by Side Diff: fusl/src/thread/sem_trywait.c

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master

Patch Set: Created 4 years, 11 months ago

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	1 #include <semaphore.h>

	2 #include "pthread_impl.h"

	3

	4 int sem_trywait(sem_t *sem)

	5 {

	6 int val;

	7 while ((val=sem->__val[0]) > 0) {

	8 int new = val-1-(val==1 && sem->__val[1]);

	9 if (a_cas(sem->__val, val, new)==val) return 0;

	10 }

	11 errno = EAGAIN;

	12 return -1;

	13 }

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