mem.c

开放源码的编译器open watcom 1.6.0版的源代码

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  Memory allocator with optional tracking.
*
****************************************************************************/


//#define DEBUGMEM

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <dos.h>
#include <malloc.h>
#ifdef __OS2_PM__
#define INCL_WINDIALOGS
#define INCL_WIN
#define INCL_GPI
#include <os2.h>
#else
#include <windows.h>
#endif
#include "mem.h"
#ifndef NO_WPI
#include "wpi.h"
#endif

/*
 * MemStart - set up required stuff for memory manager
 */
void MemStart( void )
{
#ifndef __OS2_PM__
#ifndef __386__
#ifndef __AXP__
    __win_alloc_flags = GMEM_MOVEABLE | GMEM_SHARE;
    __win_realloc_flags = GMEM_MOVEABLE | GMEM_SHARE;
#endif
#endif
#endif
} /* MemStart */

/*
 * MemAlloc - allocate some memory
 */
void *MemAlloc( unsigned size )
{
    void *x;
#if defined(DEBUGMEM)
    x = GlobalLock( GlobalAlloc( GMEM_ZEROINIT | GMEM_MOVEABLE, size ) );
#else
    x = calloc( 1, size );
#endif
#if defined(WANT_MSGS)
    if( x == NULL ) {
        MessageBox( HWND_DESKTOP, "AUUGH, Null Pointer", "Memory Allocation",
                    MB_OK | MB_ICONHAND | MB_SYSTEMMODAL );
    }
#endif
    return( x );

} /* MemAlloc */

/*
 * MemReAlloc - allocate some memory
 */
void *MemReAlloc( void *ptr, unsigned size )
{
    void *x;
#ifndef __OS2_PM__
#if defined(DEBUGMEM)
    GLOBALHANDLE        h;

    h = GlobalHandle( FP_SEG( ptr ) );
    GlobalUnlock( h );
    x = GlobalLock( GlobalReAlloc( h, size, GMEM_ZEROINIT | GMEM_MOVEABLE ) );
#else
    x = realloc( ptr, size );
#endif
#else
    x = realloc( ptr, size );
#endif
#if defined(WANT_MSGS)
    if( x == NULL ) {
        MessageBox( HWND_DESKTOP, "AUUGH, Null Pointer", "Memory Allocation",
                    MB_OK | MB_ICONHAND | MB_SYSTEMMODAL );
    }
#endif
    return( x );

} /* MemReAlloc */

/*
 * MemFree - free some memory
 */
void MemFree( void *ptr )
{
#ifndef __OS2_PM__
#if defined(DEBUGMEM)
    GLOBALHANDLE        h;

    h = GlobalHandle( FP_SEG( ptr ) );
    GlobalUnlock( h );
    GlobalFree( h );
#else
    free( ptr );
#endif
#else
    free( ptr );
#endif
} /* MemFree */