Comment cleanups.

[pdclib] / functions / stdlib / exit.c

diff --git a/functions/stdlib/exit.c b/functions/stdlib/exit.c
index 743744cf2d28a640f077524ce340b79e42d1342c..3030855af8c222e43b59120310b24e83cabb0513 100644 (file)
--- a/functions/stdlib/exit.c
+++ b/functions/stdlib/exit.c
@@ -1,8 +1,43 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * 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
+
+/* 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_regstack[ NUMBER_OF_SLOTS ])( void ) = { _PDCLIB_closeall };
+size_t _PDCLIB_regptr = NUMBER_OF_SLOTS;
+
+void exit( int status )
+{
+    while ( _PDCLIB_regptr < NUMBER_OF_SLOTS )
+    {
+        _PDCLIB_regstack[ _PDCLIB_regptr++ ]();
+    }
+    _Exit( status );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    /* Unwinding of regstack tested in atexit(). */
+    return TEST_RESULTS;
+}
+
+#endif