X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdlib%2Fexit.c;h=fa91ade1876d2b75a1626356a37f4cc57f0d243d;hp=a0525e3793c95aacd9a3a143ed6470d26589324d;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec

diff --git a/functions/stdlib/exit.c b/functions/stdlib/exit.c
index a0525e3..fa91ade 100644
--- a/functions/stdlib/exit.c
+++ b/functions/stdlib/exit.c
@@ -1,8 +1,44 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-void exit( int status ) { /* TODO */ };
+/* 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
+#include "_PDCLIB_io.h"
+
+/* TODO - "except that a function is called after any previously registered
+   functions that had already been called at the time it was registered.
+*/
+
+/* TODO: 32 is guaranteed. This should be dynamic but ATM gives problems
+   with my malloc.
+*/
+#define NUMBER_OF_SLOTS 40
+
+void (*_PDCLIB_exitstack[ NUMBER_OF_SLOTS ])( void ) = { _PDCLIB_closeall };
+size_t _PDCLIB_exitptr = NUMBER_OF_SLOTS;
+
+void exit( int status )
+{
+    while ( _PDCLIB_exitptr < NUMBER_OF_SLOTS )
+    {
+        _PDCLIB_exitstack[ _PDCLIB_exitptr++ ]();
+    }
+    _Exit( status );
+}
+
+#endif
+
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    /* Unwinding of regstack tested in atexit(). */
+    return TEST_RESULTS;
+}
+
+#endif