exit.c

一组基础的C库的实现

/* $Id: exit.c 262 2006-11-16 07:34:57Z solar $ */

/* Release $Name$ */

/* 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 );
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()
{
    BEGIN_TESTS;
    /* Unwinding of regstack tested in atexit(). */
    return TEST_RESULTS;
}

#endif