From b5289fd749bc4d2637610d712f8fe650f214f1d5 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 25 Aug 2012 22:49:47 -0400
Subject: add c11 quick_exit and at_quick_exit functions

---
 src/exit/at_quick_exit.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/exit/at_quick_exit.c

(limited to 'src/exit/at_quick_exit.c')

diff --git a/src/exit/at_quick_exit.c b/src/exit/at_quick_exit.c
new file mode 100644
index 00000000..85c3d26e
--- /dev/null
+++ b/src/exit/at_quick_exit.c
@@ -0,0 +1,29 @@
+#include <stdlib.h>
+#include "libc.h"
+
+#define COUNT 32
+
+static void (*funcs[COUNT])(void);
+static int count;
+static int lock[2];
+
+void __funcs_on_quick_exit()
+{
+	void (*func)(void);
+	LOCK(lock);
+	while (count > 0) {
+		func = funcs[--count];
+		UNLOCK(lock);
+		func();
+		LOCK(lock);
+	}
+}
+
+int at_quick_exit(void (*func)(void))
+{
+	if (count == 32) return -1;
+	LOCK(lock);
+	funcs[count++] = func;
+	UNLOCK(lock);
+	return 0;
+}
-- 
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