X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;ds=sidebyside;f=functions%2Fstdlib%2Fexit.c;h=969b795f7100fa92de5b503f225060c5de92493f;hb=2af1ca8cfb0375c80c1ca72ded9260280494c8e2;hp=a0525e3793c95aacd9a3a143ed6470d26589324d;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/stdlib/exit.c b/functions/stdlib/exit.c
index a0525e3..969b795 100644
--- a/functions/stdlib/exit.c
+++ b/functions/stdlib/exit.c
@@ -1,8 +1,46 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-void exit( int status ) { /* TODO */ };
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* exit( int )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdlib.h>
+
+#ifndef REGTEST
+
+/* TODO - "except that a function is called after any previously registered
+   functions that had already been called at the time it was registered.
+*/
+
+struct _PDCLIB_exitfunc_t * regstack = NULL;
+
+void exit( int status )
+{
+    struct _PDCLIB_exitfunc_t * next = regstack;
+    while ( next != NULL )
+    {
+        next->func();
+        regstack = next->next;
+        free( next );
+        next = regstack;
+    }
+    _Exit( status );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main()
+{
+    BEGIN_TESTS;
+    /* Unwinding of regstack tested in atexit(). */
+    return TEST_RESULTS;
+}
+
+#endif