X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fsynccall.c;h=2cd25e4bb2b84315ca4adb9c562d4592eebcb55a;hb=5a2e18093725c3965486641f0ad0b61a44f7ed68;hp=7c4f92bfdb77307338778a27adca3e9dd5ca07ad;hpb=acb04806628990ad2430e04261dd20f23babde5e;p=musl

diff --git a/src/thread/synccall.c b/src/thread/synccall.c
index 7c4f92bf..2cd25e4b 100644
--- a/src/thread/synccall.c
+++ b/src/thread/synccall.c
@@ -4,7 +4,7 @@
 static struct chain {
 	struct chain *next;
 	sem_t sem, sem2;
-} *head;
+} *head, *cur;
 
 static void (*callback)(void *), *context;
 static int chainlen;
@@ -47,22 +47,30 @@ static void handler(int sig, siginfo_t *si, void *ctx)
 	errno = old_errno;
 }
 
+void __synccall_wait()
+{
+	struct chain *ch = cur;
+	sem_post(&ch->sem2);
+	while (sem_wait(&ch->sem));
+	sem_post(&ch->sem);
+}
+
 void __synccall(void (*func)(void *), void *ctx)
 {
 	pthread_t self;
 	struct sigaction sa;
-	struct chain *cur, *next;
+	struct chain *next;
 	uint64_t oldmask;
 
-	pthread_rwlock_wrlock(&lock);
-
-	__syscall(SYS_rt_sigprocmask, SIG_BLOCK, (uint64_t[]){-1}, &oldmask, 8);
-
 	if (!libc.threads_minus_1) {
 		func(ctx);
 		return;
 	}
 
+	pthread_rwlock_wrlock(&lock);
+
+	__syscall(SYS_rt_sigprocmask, SIG_BLOCK, (uint64_t[]){-1}, &oldmask, 8);
+
 	sem_init(&chaindone, 0, 0);
 	sem_init(&chainlock, 0, 1);
 	chainlen = 0;