new lock algorithm with state and congestion count in one atomic int

[musl] / src / thread / pthread_detach.c

diff --git a/src/thread/pthread_detach.c b/src/thread/pthread_detach.c
index e803239..d9c90d1 100644 (file)
--- a/src/thread/pthread_detach.c
+++ b/src/thread/pthread_detach.c
@@ -1,11 +1,17 @@
 #include "pthread_impl.h"
+#include <threads.h>
 
-int pthread_detach(pthread_t t)
+int __pthread_join(pthread_t, void **);
+
+static int __pthread_detach(pthread_t t)
 {
        /* Cannot detach a thread that's already exiting */
-       if (a_swap(&t->exitlock, 1))
-               return pthread_join(t, 0);
+       if (a_cas(t->exitlock, 0, INT_MIN + 1))
+               return __pthread_join(t, 0);
        t->detached = 2;
-       a_store(&t->exitlock, 0);
+       __unlock(t->exitlock);
        return 0;
 }
+
+weak_alias(__pthread_detach, pthread_detach);
+weak_alias(__pthread_detach, thrd_detach);