quake2forge/win32/q_shwin.c

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2001-12-22 04:27:19 +00:00
/*
Copyright (C) 1997-2001 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "../qcommon/qcommon.h"
#include "winquake.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <direct.h>
#include <io.h>
#include <conio.h>
//===============================================================================
int hunkcount;
byte *membase;
int hunkmaxsize;
int cursize;
#define VIRTUAL_ALLOC
void *Hunk_Begin (int maxsize)
{
// reserve a huge chunk of memory, but don't commit any yet
cursize = 0;
hunkmaxsize = maxsize;
#ifdef VIRTUAL_ALLOC
membase = VirtualAlloc (NULL, maxsize, MEM_RESERVE, PAGE_NOACCESS);
#else
membase = malloc (maxsize);
memset (membase, 0, maxsize);
#endif
if (!membase)
Sys_Error ("VirtualAlloc reserve failed");
return (void *)membase;
}
void *Hunk_Alloc (int size)
{
void *buf;
// round to cacheline
size = (size+31)&~31;
#ifdef VIRTUAL_ALLOC
// commit pages as needed
// buf = VirtualAlloc (membase+cursize, size, MEM_COMMIT, PAGE_READWRITE);
buf = VirtualAlloc (membase, cursize+size, MEM_COMMIT, PAGE_READWRITE);
if (!buf)
{
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &buf, 0, NULL);
Sys_Error ("VirtualAlloc commit failed.\n%s", buf);
}
#endif
cursize += size;
if (cursize > hunkmaxsize)
Sys_Error ("Hunk_Alloc overflow");
return (void *)(membase+cursize-size);
}
int Hunk_End (void)
{
// free the remaining unused virtual memory
#if 0
void *buf;
// write protect it
buf = VirtualAlloc (membase, cursize, MEM_COMMIT, PAGE_READONLY);
if (!buf)
Sys_Error ("VirtualAlloc commit failed");
#endif
hunkcount++;
//Com_Printf ("hunkcount: %i\n", hunkcount);
return cursize;
}
void Hunk_Free (void *base)
{
if ( base )
#ifdef VIRTUAL_ALLOC
VirtualFree (base, 0, MEM_RELEASE);
#else
free (base);
#endif
hunkcount--;
}
//===============================================================================
/*
================
Sys_Milliseconds
================
*/
int curtime;
int Sys_Milliseconds (void)
{
static int base;
static qboolean initialized = false;
if (!initialized)
{ // let base retain 16 bits of effectively random data
base = timeGetTime() & 0xffff0000;
initialized = true;
}
curtime = timeGetTime() - base;
return curtime;
}
void Sys_Mkdir (char *path)
{
_mkdir (path);
}
//============================================
char findbase[MAX_OSPATH];
char findpath[MAX_OSPATH];
int findhandle;
static qboolean CompareAttributes( unsigned found, unsigned musthave, unsigned canthave )
{
if ( ( found & _A_RDONLY ) && ( canthave & SFF_RDONLY ) )
return false;
if ( ( found & _A_HIDDEN ) && ( canthave & SFF_HIDDEN ) )
return false;
if ( ( found & _A_SYSTEM ) && ( canthave & SFF_SYSTEM ) )
return false;
if ( ( found & _A_SUBDIR ) && ( canthave & SFF_SUBDIR ) )
return false;
if ( ( found & _A_ARCH ) && ( canthave & SFF_ARCH ) )
return false;
if ( ( musthave & SFF_RDONLY ) && !( found & _A_RDONLY ) )
return false;
if ( ( musthave & SFF_HIDDEN ) && !( found & _A_HIDDEN ) )
return false;
if ( ( musthave & SFF_SYSTEM ) && !( found & _A_SYSTEM ) )
return false;
if ( ( musthave & SFF_SUBDIR ) && !( found & _A_SUBDIR ) )
return false;
if ( ( musthave & SFF_ARCH ) && !( found & _A_ARCH ) )
return false;
return true;
}
char *Sys_FindFirst (char *path, unsigned musthave, unsigned canthave )
{
struct _finddata_t findinfo;
if (findhandle)
Sys_Error ("Sys_BeginFind without close");
findhandle = 0;
COM_FilePath (path, findbase);
findhandle = _findfirst (path, &findinfo);
if (findhandle == -1)
return NULL;
if ( !CompareAttributes( findinfo.attrib, musthave, canthave ) )
return NULL;
Com_sprintf (findpath, sizeof(findpath), "%s/%s", findbase, findinfo.name);
return findpath;
}
char *Sys_FindNext ( unsigned musthave, unsigned canthave )
{
struct _finddata_t findinfo;
if (findhandle == -1)
return NULL;
if (_findnext (findhandle, &findinfo) == -1)
return NULL;
if ( !CompareAttributes( findinfo.attrib, musthave, canthave ) )
return NULL;
Com_sprintf (findpath, sizeof(findpath), "%s/%s", findbase, findinfo.name);
return findpath;
}
void Sys_FindClose (void)
{
if (findhandle != -1)
_findclose (findhandle);
findhandle = 0;
}
//============================================