/* at_quick_exit( 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 == _PDCLIB_ATEXIT_SLOTS )
    {
        return -1;
    }
    else
    {
        _PDCLIB_quickexitstack[ _PDCLIB_quickexitptr++ ] = func;
        return 0;
    }
}

#endif

#ifdef TEST

#include "_PDCLIB_test.h"

#include <assert.h>

#if ! defined( REGTEST ) || __STDC_VERSION__ >= 201112L

static int flags[ 32 ];

static void counthandler( void )
{
    static int count = 0;
    flags[ count ] = count;
    ++count;
}

static void checkhandler( void )
{
    int i;
    for ( i = 0; i < 32; ++i )
    {
        assert( flags[ i ] == i );
    }
}

#endif

int main( void )
{
#if ! defined( REGTEST ) || __STDC_VERSION__ >= 201112L
    int i;
    TESTCASE( at_quick_exit( &checkhandler ) == 0 );
    for ( i = 0; i < 32; ++i )
    {
        TESTCASE( at_quick_exit( &counthandler ) == 0 );
    }
#endif
    return TEST_RESULTS;
}

#endif
