Getting stdlib.h to C11.

[pdclib] / functions / stdlib / at_quick_exit.c

diff --git a/functions/stdlib/at_quick_exit.c b/functions/stdlib/at_quick_exit.c
new file mode 100644 (file)
index 0000000..1d2a760
--- /dev/null
+++ b/functions/stdlib/at_quick_exit.c
@@ -0,0 +1,60 @@
+/* atexit( void (*)( void ) )
+
+   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
+
+extern void (*_PDCLIB_quickexitstack[])( void );
+extern size_t _PDCLIB_quickexitptr;
+
+int at_quick_exit( void (*func)( void ) )
+{
+    if ( _PDCLIB_quickexitptr == 0 )
+    {
+        return -1;
+    }
+    else
+    {
+        _PDCLIB_quickexitstack[ --_PDCLIB_quickexitptr ] = func;
+        return 0;
+    }
+}
+
+#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( at_quick_exit( &checkhandler ) == 0 );
+    for ( int i = 0; i < 31; ++i )
+    {
+        TESTCASE( at_quick_exit( &counthandler ) == 0 );
+    }
+    return TEST_RESULTS;
+}
+
+#endif