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optimize arm setjmp/longjmp register saving/loading
[musl]
/
src
/
thread
/
pthread_spin_trylock.c
diff --git
a/src/thread/pthread_spin_trylock.c
b/src/thread/pthread_spin_trylock.c
index
1fc5f73
..
59de695
100644
(file)
--- a/
src/thread/pthread_spin_trylock.c
+++ b/
src/thread/pthread_spin_trylock.c
@@
-2,6
+2,5
@@
int pthread_spin_trylock(pthread_spinlock_t *s)
{
- if (*s || a_xchg(s, 1)) return EBUSY;
- return 0;
+ return -a_swap(s, 1) & EBUSY;
}