X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2F__lockfile.c;h=93c94867868801c4d4df7dd8d3e9fb0f90648b18;hb=e3cd6c5c265cd481db6e0c5b529855d99f0bda30;hp=e4320f050c9f85fd83d1f0e06a32b05cddb40b9f;hpb=aa398f56fa398f2202b04e82c67f822f3233786f;p=musl

diff --git a/src/stdio/__lockfile.c b/src/stdio/__lockfile.c
index e4320f05..93c94867 100644
--- a/src/stdio/__lockfile.c
+++ b/src/stdio/__lockfile.c
@@ -3,17 +3,18 @@
 
 void __lockfile(FILE *f)
 {
-	int spins;
-	if (f->owner < 0) return;
-	if (f->owner && f->owner == __pthread_self()->tid) {
+	int spins=100000;
+	int tid;
+
+	if (f->lock < 0) return;
+	tid = __pthread_self()->tid;
+	if (f->lock == tid) {
 		while (f->lockcount == INT_MAX);
 		f->lockcount++;
 		return;
 	}
-	spins = 100000;
-	while (a_swap(&f->lock, 1))
+	while (f->lock || a_cas(&f->lock, 0, tid))
 		if (spins) spins--, a_spin();
 		else syscall(SYS_sched_yield);
-	f->owner = __pthread_self()->tid;
 	f->lockcount = 1;
 }