add c11 quick_exit and at_quick_exit functions

[musl] / src / exit / quick_exit.c

diff --git a/src/exit/quick_exit.c b/src/exit/quick_exit.c
new file mode 100644 (file)
index 0000000..18d5288
--- /dev/null
+++ b/src/exit/quick_exit.c
@@ -0,0 +1,15 @@
+#include <stdlib.h>
+#include "syscall.h"
+#include "atomic.h"
+#include "libc.h"
+
+static void dummy() { }
+weak_alias(dummy, __funcs_on_quick_exit);
+
+void quick_exit(int code)
+{
+       static int lock;
+       while (a_swap(&lock, 1)) __syscall(SYS_pause);
+       __funcs_on_quick_exit();
+       _Exit(code);
+}