Initial revision

lang/cem/libcc.ansi/stdlib/exit.c

@@ -0,0 +1,42 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
+/* $Header$ */
+
+#include	<stdlib.h>
+
+#define	NEXITS	32
+
+static void (*functab[NEXITS])(void);
+static int funccnt = 0;
+
+extern void _cleanup(void);
+extern void _exit(int);
+
+static void
+_calls(void)
+{
+	register int i = funccnt;
+	
+	/* "Called in reversed order of their registration" */
+	while (--i >= 0)
+		(*functab[i])();
+}
+
+void
+exit(int status)
+{
+	_calls();
+	_cleanup() ;
+	_exit(status) ;
+}
+
+int
+atexit(void (*func)(void))
+{
+	if (funccnt >= NEXITS)
+		return 1;
+	functab[funccnt++] = func;
+	return 0;
+}