X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Fatexit.c;h=a2c1598dd7b1371d97c85f7f2d0d9de17db2aea4;hb=b1fc26afebd4d557ff89a44bc21767a8704c3809;hp=d9f0ee942b2ebd9e4267d79fc1baf564349cae86;hpb=1d9d92ba957a0b8307c9a65c35867fde68e6533b;p=pdclib

diff --git a/functions/stdlib/atexit.c b/functions/stdlib/atexit.c
index d9f0ee9..a2c1598 100644
--- a/functions/stdlib/atexit.c
+++ b/functions/stdlib/atexit.c
@@ -1,24 +1,60 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * Public Domain C Library - http://pdclib.sourceforge.net
- * This code is Public Domain. Use, modify, and redistribute at will.
- * --------------------------------------------------------------------------*/
+/* atexit( void (*)( void ) )
 
-int atexit( void (*func) ( void ) ) { /* TODO */ };
+   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
 
-/* PDPC code - unreviewed
+extern void (*_PDCLIB_regstack[])( void );
+extern size_t _PDCLIB_regptr;
+
+int atexit( void (*func)( void ) )
 {
-    int x;
-    
-    for (x = 0; x < __NATEXIT; x++)
+    if ( _PDCLIB_regptr == 0 )
+    {
+        return -1;
+    }
+    else
     {
-        if (__userExit[x] == 0)
-        {
-            __userExit[x] = func;
-            return (0);
-        }
+        _PDCLIB_regstack[ --_PDCLIB_regptr ] = func;
+        return 0;
     }
-    return (-1);
 }
-*/
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <assert.h>
+
+static int flags[ 32 ];
+
+static void counthandler( void )
+{
+    static int count = 0;
+    flags[ count ] = count;
+    ++count;
+}
+
+static void checkhandler( void )
+{
+    for ( int i = 0; i < 31; ++i )
+    {
+        assert( flags[ i ] == i );
+    }
+}
+
+int main( void )
+{
+    TESTCASE( atexit( &checkhandler ) == 0 );
+    for ( int i = 0; i < 31; ++i )
+    {
+        TESTCASE( atexit( &counthandler ) == 0 );
+    }
+    return TEST_RESULTS;
+}
+
+#endif