#include <unistd.h>
#include <stdio.h>
#include "libc.h"
+#include "atomic.h"
+#include "syscall.h"
-/* __overflow.c and atexit.c override these */
-static int (*const dummy)() = 0;
+static void dummy()
+{
+}
+
+/* __towrite.c and atexit.c override these */
weak_alias(dummy, __funcs_on_exit);
weak_alias(dummy, __fflush_on_exit);
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 */
- if (__funcs_on_exit) __funcs_on_exit();
- if (__fflush_on_exit) __fflush_on_exit(0);
+ __funcs_on_exit();
+ __fflush_on_exit();
/* Destructor s**t is kept separate from atexit to avoid bloat */
if (libc.fini) libc.fini();