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authorRich Felker <dalias@aerifal.cx>2011-03-28 22:36:55 -0400
committerRich Felker <dalias@aerifal.cx>2011-03-28 22:36:55 -0400
commit4106cdcd2de34bf3b9839e042344d92eae887ecb (patch)
tree9d14a51c59eb318024aa0edf2a1c19ffa0ed6583 /src/thread/pthread_spin_trylock.c
parent4cc78719dd22a685ddd89b92ac3bfc308c4c19b3 (diff)
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revert some more spin optimizations that turned out to be pessimizations
Diffstat (limited to 'src/thread/pthread_spin_trylock.c')
-rw-r--r--src/thread/pthread_spin_trylock.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/src/thread/pthread_spin_trylock.c b/src/thread/pthread_spin_trylock.c
index 1fc5f73c..c12696b3 100644
--- 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_xchg(s, 1) & EBUSY;
 }