dsxmem.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 64 行

/****************************************************************************
*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*  ========================================================================
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*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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#include "dbgdefn.h"
#include "dbgtoggl.h"
#include <malloc.h>

extern unsigned long    MemSize;
extern void             MemExpand(void);

extern int _d16ReserveExt( int );
#pragma aux _d16ReserveExt =    "mov cx,ax" \
                                "shr eax,16" \
                                "mov bx,ax" \
                                "mov dx,1400H" \
                                "mov ax,0ff00H" \
                                "int 21H" \
                                "ror eax,16" \
                                "mov ax,dx" \
                                "ror eax,16" \
                                parm [ eax ] \
                                value [ eax ] \
                                modify [ ebx ecx edx ]

void SysSetMemLimit()
{
#if !defined(__OSI__)
    _d16ReserveExt( MemSize + 1*1024UL*1024UL );
#endif
    MemExpand();
    if( _IsOff( SW_REMOTE_LINK ) && _IsOff( SW_KEEP_HEAP_ENABLED ) ) {
        _heapenable( 0 );
    }
}