initial check-in, version 0.5.0 v0.5.0

1 files changed, 28 insertions, 0 deletions

diff --git a/src/exit/exit.c b/src/exit/exit.c
new file mode 100644
index 00000000..d0c1bfc1
--- /dev/null
+++ b/src/exit/exit.c
@@ -0,0 +1,28 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include "libc.h"
+
+/* __overflow.c and atexit.c override these */
+static int (*const dummy)() = 0;
+weak_alias(dummy, __funcs_on_exit);
+weak_alias(dummy, __fflush_on_exit);
+
+void exit(int code)
+{
+	static int lock;
+
+	/* If more than one thread calls exit, hang until _Exit ends it all */
+	LOCK(&lock);
+
+	/* 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);
+
+	/* Destructor s**t is kept separate from atexit to avoid bloat */
+	if (libc.fini) libc.fini();
+	if (libc.ldso_fini) libc.ldso_fini();
+
+	_Exit(code);
+	for(;;);
+}