remove __lock dependency from exit

[musl] / src / exit / exit.c

diff --git a/src/exit/exit.c b/src/exit/exit.c
index ae557c0..fc29148 100644 (file)
--- a/src/exit/exit.c
+++ b/src/exit/exit.c
@@ -2,6 +2,8 @@
 #include <unistd.h>
 #include <stdio.h>
 #include "libc.h"
+#include "atomic.h"
+#include "syscall.h"
 
 static void dummy()
 {
@@ -13,10 +15,10 @@ weak_alias(dummy, __fflush_on_exit);
 
 void exit(int code)
 {
-       static int lock[2];
+       static int lock;
 
        /* If more than one thread calls exit, hang until _Exit ends it all */
-       LOCK(lock);
+       while (a_swap(&lock, 1)) __syscall(SYS_pause);
 
        /* Only do atexit & stdio flush if they were actually used */
        __funcs_on_exit();