X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2F__lock.c;h=0874c04a4c0a81a9fa0dc032479ec18cec81d8aa;hb=78a8ef47c4d92b7680c52a85f80a81e29da86bb9;hp=21c85fc0636f71f6eb715459590f78ec4e0aaac5;hpb=6232b96f5153d0b718054a8bc569fcd7d596bab2;p=musl

diff --git a/src/thread/__lock.c b/src/thread/__lock.c
index 21c85fc0..0874c04a 100644
--- a/src/thread/__lock.c
+++ b/src/thread/__lock.c
@@ -2,10 +2,14 @@
 
 void __lock(volatile int *l)
 {
-	int spins=10000;
-	/* 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(SYS_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);
+	}
 }