X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2F__lock.c;h=0874c04a4c0a81a9fa0dc032479ec18cec81d8aa;hb=002e8d84c5fec47636606aef5d2f16914c6097f3;hp=21cb71a84cf9b7c94789319c880aee2b30710d07;hpb=685e40bb09f5f24a2af54ea09c97328808f76990;p=musl

diff --git a/src/thread/__lock.c b/src/thread/__lock.c
index 21cb71a8..0874c04a 100644
--- a/src/thread/__lock.c
+++ b/src/thread/__lock.c
@@ -2,10 +2,14 @@
 
 void __lock(volatile int *l)
 {
-	int spins=100000;
-	/* Do not use futexes because we insist that unlocking is a simple
-	 * assignment to optimize non-pathological code with no contention. */
-	while (a_xchg(l, 1))
-		if (spins) spins--, a_spin();
-		else __syscall(__NR_sched_yield);
+	if (libc.threads_minus_1)
+		while (a_swap(l, 1)) __wait(l, l+1, 1, 1);
+}
+
+void __unlock(volatile int *l)
+{
+	if (l[0]) {
+		a_store(l, 0);
+		if (l[1]) __wake(l, 1, 1);
+	}
 }