X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fvmlock.c;h=75f3cb76190fe4e8796997e7c3d29af80fb36792;hb=3cd3de61894b73ca9f62ab9e5b572fc1037dcd55;hp=125c6dc924724b7a3e08ee1dd1e97c59e9d5c6e7;hpb=56fbaa3bbe73f12af2bfbbcf2adb196e6f9fe264;p=musl

diff --git a/src/thread/vmlock.c b/src/thread/vmlock.c
index 125c6dc9..75f3cb76 100644
--- a/src/thread/vmlock.c
+++ b/src/thread/vmlock.c
@@ -2,21 +2,20 @@
 
 static volatile int vmlock[2];
 
-void __vm_lock(int inc)
+void __vm_wait()
 {
-	for (;;) {
-		int v = vmlock[0];
-		if (inc*v < 0) __wait(vmlock, vmlock+1, v, 1);
-		else if (a_cas(vmlock, v, v+inc)==v) break;
-	}
+	int tmp;
+	while ((tmp=vmlock[0]))
+		__wait(vmlock, vmlock+1, tmp, 1);
 }
 
-void __vm_unlock(void)
+void __vm_lock()
 {
-	int inc = vmlock[0]>0 ? -1 : 1;
-	if (a_fetch_add(vmlock, inc)==-inc && vmlock[1])
-		__wake(vmlock, -1, 1);
+	a_inc(vmlock);
 }
 
-weak_alias(__vm_lock, __vm_lock_impl);
-weak_alias(__vm_unlock, __vm_unlock_impl);
+void __vm_unlock()
+{
+	if (a_fetch_add(vmlock, -1)==1 && vmlock[1])
+		__wake(vmlock, -1, 1);
+}