xash3d-fwgs/engine/common/host.c

/*
host.c - dedicated and normal host
Copyright (C) 2007 Uncle Mike

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 3 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.
*/

#include "common.h"
#include "netchan.h"
#include "protocol.h"
#include "mod_local.h"
#include "mathlib.h"
#include "input.h"
#include "features.h"
#include "render_api.h"	// decallist_t

typedef void (*pfnChangeGame)( const char *progname );

pfnChangeGame	pChangeGame = NULL;
HINSTANCE		hCurrent;	// hinstance of current .dll
host_parm_t	host;	// host parms
sysinfo_t		SI;

CVAR_DEFINE( host_developer, "developer", "0", 0, "engine is in development-mode" );
CVAR_DEFINE_AUTO( sys_ticrate, "100", 0, "framerate in dedicated mode" );
convar_t	*host_gameloaded;
convar_t	*host_clientloaded;
convar_t	*host_limitlocal;
convar_t	*host_maxfps;
convar_t	*host_framerate;
convar_t	*con_gamemaps;
convar_t	*build, *ver;

int Host_CompareFileTime( long ft1, long ft2 )
{
	if( ft1 < ft2 )
	{
		return -1;
	}
	else if( ft1 > ft2 )
	{
		return 1;
	}
	return 0;
}

void Host_ShutdownServer( void )
{
	SV_Shutdown( "Server was killed\n" );
}

/*
================
Host_PrintEngineFeatures
================
*/
void Host_PrintEngineFeatures( void )
{
	if( FBitSet( host.features, ENGINE_WRITE_LARGE_COORD ))
		MsgDev( D_REPORT, "^3EXT:^7 big world support enabled\n" );

	if( FBitSet( host.features, ENGINE_LOAD_DELUXEDATA ))
		MsgDev( D_REPORT, "^3EXT:^7 deluxemap support enabled\n" );

	if( FBitSet( host.features, ENGINE_PHYSICS_PUSHER_EXT ))
		MsgDev( D_REPORT, "^3EXT:^7 Improved MOVETYPE_PUSH is used\n" );

	if( FBitSet( host.features, ENGINE_LARGE_LIGHTMAPS ))
		MsgDev( D_REPORT, "^3EXT:^7 Large lightmaps enabled\n" );

	if( FBitSet( host.features, ENGINE_COMPENSATE_QUAKE_BUG ))
		MsgDev( D_REPORT, "^3EXT:^7 Compensate quake bug enabled\n" );
}

/*
================
Host_EndGame
================
*/
void Host_EndGame( qboolean abort, const char *message, ... )
{
	va_list		argptr;
	static char	string[MAX_SYSPATH];
	
	va_start( argptr, message );
	Q_vsnprintf( string, sizeof( string ), message, argptr );
	va_end( argptr );

	MsgDev( D_INFO, "Host_EndGame: %s\n", string );

	SV_Shutdown( "\n" );	
	CL_Disconnect();

	// recreate world if needs
	CL_ClearEdicts ();

	// release all models
	Mod_FreeAll();

	if( abort ) Host_AbortCurrentFrame ();
}

/*
================
Host_AbortCurrentFrame

aborts the current host frame and goes on with the next one
================
*/
void Host_AbortCurrentFrame( void )
{
	longjmp( host.abortframe, 1 );
}

/*
==================
Host_CheckSleep
==================
*/
void Host_CheckSleep( void )
{
	if( host.type == HOST_DEDICATED )
	{
		// let the dedicated server some sleep
		Sys_Sleep( 1 );
	}
	else
	{
		if( host.status == HOST_NOFOCUS )
		{
			if( SV_Active() && CL_IsInGame( ))
				Sys_Sleep( 1 ); // listenserver
			else Sys_Sleep( 20 ); // sleep 20 ms otherwise
		}
		else if( host.status == HOST_SLEEP )
		{
			// completely sleep in minimized state
			Sys_Sleep( 20 );
		}
	}
}

void Host_NewInstance( const char *name, const char *finalmsg )
{
	if( !pChangeGame ) return;

	host.change_game = true;
	Q_strncpy( host.finalmsg, finalmsg, sizeof( host.finalmsg ));
	pChangeGame( name ); // call from hl.exe
}

/*
=================
Host_ChangeGame_f

Change game modification
=================
*/
void Host_ChangeGame_f( void )
{
	int	i;

	if( Cmd_Argc() != 2 )
	{
		Con_Printf( S_USAGE "game <directory>\n" );
		return;
	}

	// validate gamedir
	for( i = 0; i < SI.numgames; i++ )
	{
		if( !Q_stricmp( SI.games[i]->gamefolder, Cmd_Argv( 1 )))
			break;
	}

	if( i == SI.numgames )
	{
		Con_Printf( "%s not exist\n", Cmd_Argv( 1 ));
	}
	else if( !Q_stricmp( GI->gamefolder, Cmd_Argv( 1 )))
	{
		Con_Printf( "%s already active\n", Cmd_Argv( 1 ));	
	}
	else
	{
		const char *arg1 = va( "%s%s", (host.type == HOST_NORMAL) ? "" : "#", Cmd_Argv( 1 ));
		const char *arg2 = va( "change game to '%s'", SI.games[i]->title );

		Host_NewInstance( arg1, arg2 );
	}
}

/*
===============
Host_Exec_f
===============
*/
void Host_Exec_f( void )
{
	string	cfgpath;
	char	*f, *txt; 
	size_t	len;

	if( Cmd_Argc() != 2 )
	{
		Con_Printf( S_USAGE "exec <filename>\n" );
		return;
	}

	if( !Q_stricmp( "game.cfg", Cmd_Argv( 1 )))
	{
		// don't execute game.cfg in singleplayer
		if( SV_GetMaxClients() == 1 )
			return;
	}

	Q_strncpy( cfgpath, Cmd_Argv( 1 ), sizeof( cfgpath )); 
	COM_DefaultExtension( cfgpath, ".cfg" ); // append as default

	f = FS_LoadFile( cfgpath, &len, false );
	if( !f )
	{
		MsgDev( D_NOTE, "couldn't exec %s\n", Cmd_Argv( 1 ));
		return;
	}

	if( !Q_stricmp( "config.cfg", Cmd_Argv( 1 )))
		host.config_executed = true;

	// adds \n\0 at end of the file
	txt = Z_Malloc( len + 2 );
	memcpy( txt, f, len );
	Q_strncat( txt, "\n", len + 2 );
	Mem_Free( f );

	if( !host.apply_game_config )
		MsgDev( D_INFO, "execing %s\n", Cmd_Argv( 1 ));
	Cbuf_InsertText( txt );
	Mem_Free( txt );
}

/*
===============
Host_MemStats_f
===============
*/
void Host_MemStats_f( void )
{
	switch( Cmd_Argc( ))
	{
	case 1:
		Mem_PrintList( 1<<30 );
		Mem_PrintStats();
		break;
	case 2:
		Mem_PrintList( Q_atoi( Cmd_Argv( 1 )) * 1024 );
		Mem_PrintStats();
		break;
	default:
		Con_Printf( S_USAGE "memlist <all>\n" );
		break;
	}
}

void Host_Minimize_f( void )
{
	if( host.hWnd ) ShowWindow( host.hWnd, SW_MINIMIZE );
}

/*
=================
Host_IsLocalGame

singleplayer game detect
=================
*/
qboolean Host_IsLocalGame( void )
{
	if( SV_Active( ))
	{
		return ( SV_GetMaxClients() == 1 ) ? true : false;
	}
	else
	{
		return ( CL_GetMaxClients() == 1 ) ? true : false;
	}
}

qboolean Host_IsLocalClient( void )
{
	// only the local client have the active server
	if( CL_Initialized( ) && SV_Initialized( ))
		return true;
	return false;
}

/*
=================
Host_RegisterDecal
=================
*/
qboolean Host_RegisterDecal( const char *name, int *count )
{
	char	shortname[MAX_QPATH];
	int	i;

	if( !COM_CheckString( name ))
		return 0;

	COM_FileBase( name, shortname );

	for( i = 1; i < MAX_DECALS && host.draw_decals[i][0]; i++ )
	{
		if( !Q_stricmp( host.draw_decals[i], shortname ))
			return true;
	}

	if( i == MAX_DECALS )
	{
		MsgDev( D_ERROR, "MAX_DECALS limit exceeded (%d)\n", MAX_DECALS );
		return false;
	}

	// register new decal
	Q_strncpy( host.draw_decals[i], shortname, sizeof( host.draw_decals[i] ));
	*count += 1;

	return true;
}

/*
=================
Host_InitDecals
=================
*/
void Host_InitDecals( void )
{
	int	i, num_decals = 0;
	search_t	*t;

	memset( host.draw_decals, 0, sizeof( host.draw_decals ));

	// lookup all the decals in decals.wad (basedir, gamedir, falldir)
	t = FS_Search( "decals.wad/*.*", true, false );

	for( i = 0; t && i < t->numfilenames; i++ )
	{
		if( !Host_RegisterDecal( t->filenames[i], &num_decals ))
			break;
	}

	if( t ) Mem_Free( t );
	Con_Reportf( "InitDecals: %i decals\n", num_decals );
}

/*
===================
Host_GetCommands

Add them exactly as if they had been typed at the console
===================
*/
void Host_GetCommands( void )
{
	char	*cmd;

	if( host.type != HOST_DEDICATED )
		return;

	cmd = Con_Input();
	if( cmd ) Cbuf_AddText( cmd );
	Cbuf_Execute ();
}

/*
===================
Host_CalcFPS

compute actual FPS for various modes
===================
*/
double Host_CalcFPS( void )
{
	double	fps = 0.0;

	// NOTE: we should play demos with same fps as it was recorded
	if( CL_IsPlaybackDemo() || CL_IsRecordDemo( ))
	{
		fps = CL_GetDemoFramerate();
	}
	else if( Host_IsLocalGame( ))
	{
		fps = host_maxfps->value;
	}
	else if( host.type == HOST_DEDICATED )
	{
		fps = sys_ticrate.value;
	}
	else
	{
		fps = host_maxfps->value;
		fps = bound( MIN_FPS, fps, MAX_FPS );
	}

	// probably left part of this condition is redundant :-)
	if( host.type != HOST_DEDICATED && Host_IsLocalGame( ) && !CL_IsTimeDemo( ))
	{
		// ajdust fps for vertical synchronization
		if( gl_vsync != NULL && gl_vsync->value )
		{
			if( vid_displayfrequency->value != 0.0f )
				fps = vid_displayfrequency->value;
			else fps = 60.0; // default
		}
	}

	return fps;
}

/*
===================
Host_FilterTime

Returns false if the time is too short to run a frame
===================
*/
qboolean Host_FilterTime( float time )
{
	static double	oldtime;
	double		fps;

	host.realtime += time;
	fps = Host_CalcFPS( );

	// clamp the fps in multiplayer games
	if( fps != 0.0 )
	{
		// limit fps to withing tolerable range
		fps = bound( MIN_FPS, fps, MAX_FPS );

		if( host.type == HOST_DEDICATED )
		{
			if(( host.realtime - oldtime ) < ( 1.0 / ( fps + 1.0 )))
				return false;
		}
		else
		{
			if(( host.realtime - oldtime ) < ( 1.0 / fps ))
				return false;		
		}
	}

	host.frametime = host.realtime - oldtime;
	host.realframetime = bound( MIN_FRAMETIME, host.frametime, MAX_FRAMETIME );
	oldtime = host.realtime;

	// NOTE: allow only in singleplayer while demos are not active
	if( host_framerate->value > 0.0f && Host_IsLocalGame() && !CL_IsPlaybackDemo() && !CL_IsRecordDemo( ))
		host.frametime = bound( MIN_FRAMETIME, host_framerate->value, MAX_FRAMETIME );
	else host.frametime = bound( MIN_FRAMETIME, host.frametime, MAX_FRAMETIME );

	return true;
}

/*
=================
Host_Frame
=================
*/
void Host_Frame( float time )
{
	Host_CheckSleep();

	// decide the simulation time
	if( !Host_FilterTime( time ))
		return;

	Host_InputFrame ();  // input frame
	Host_ClientBegin (); // begin client
	Host_GetCommands (); // dedicated in
	Host_ServerFrame (); // server frame
	Host_ClientFrame (); // client frame

	host.framecount++;
}

/*
=================
Host_Error
=================
*/
void Host_Error( const char *error, ... )
{
	static char	hosterror1[MAX_SYSPATH];
	static char	hosterror2[MAX_SYSPATH];
	static qboolean	recursive = false;
	va_list		argptr;

	if( host.mouse_visible && !CL_IsInMenu( ))
	{
		// hide VGUI mouse
		while( ShowCursor( false ) >= 0 );
		host.mouse_visible = false;
	}

	va_start( argptr, error );
	Q_vsprintf( hosterror1, error, argptr );
	va_end( argptr );

	CL_WriteMessageHistory (); // before Q_error call

	if( host.framecount < 3 )
	{
		Sys_Error( "Host_InitError: %s", hosterror1 );
	}
	else if( host.framecount == host.errorframe )
	{
		Sys_Error( "Host_MultiError: %s", hosterror2 );
		return;
	}
	else
	{
		if( host.allow_console )
		{
			UI_SetActiveMenu( false );
			Key_SetKeyDest( key_console );
			Con_Printf( "Host_Error: %s", hosterror1 );
		}
		else MSGBOX2( hosterror1 );
	}

	// host is shutting down. don't invoke infinite loop
	if( host.status == HOST_SHUTDOWN ) return;

	if( recursive )
	{ 
		Con_Printf( "Host_RecursiveError: %s", hosterror2 );
		Sys_Error( hosterror1 );
		return; // don't multiple executes
	}

	recursive = true;
	Q_strncpy( hosterror2, hosterror1, MAX_SYSPATH );
	host.errorframe = host.framecount; // to avoid multply calls per frame
	Q_sprintf( host.finalmsg, "Server crashed: %s", hosterror1 );

	// clearing cmd buffer to prevent execute any commands
	COM_InitHostState();
	Cbuf_Clear();

	Host_ShutdownServer();
	CL_Drop(); // drop clients

	// recreate world if needs
	CL_ClearEdicts ();

	// release all models
	Mod_FreeAll();

	recursive = false;
	Host_AbortCurrentFrame();
}

void Host_Error_f( void )
{
	const char *error = Cmd_Argv( 1 );

	if( !*error ) error = "Invoked host error";
	Host_Error( "%s\n", error );
}

void Sys_Error_f( void )
{
	const char *error = Cmd_Argv( 1 );

	if( !*error ) error = "Invoked sys error";
	Sys_Error( "%s\n", error );
}

/*
=================
Host_Crash_f
=================
*/
static void Host_Crash_f( void )
{
	*(int *)0 = 0xffffffff;
}

/*
=================
Host_InitCommon
=================
*/
void Host_InitCommon( const char *hostname, qboolean bChangeGame )
{
	MEMORYSTATUS	lpBuffer;
	char		dev_level[4];
	char		ticrate[16];
	char		progname[128];
	char		cmdline[128];
	qboolean		parse_cmdline = false;
	char		szTemp[MAX_SYSPATH];
	int		developer = 0;
	string		szRootPath;
	char		*in, *out;
	double		fps;

	lpBuffer.dwLength = sizeof( MEMORYSTATUS );
	GlobalMemoryStatus( &lpBuffer );

	if( !GetCurrentDirectory( sizeof( host.rootdir ), host.rootdir ))
		Sys_Error( "couldn't determine current directory\n" );

	if( host.rootdir[Q_strlen( host.rootdir ) - 1] == '/' )
		host.rootdir[Q_strlen( host.rootdir ) - 1] = 0;

	host.oldFilter = SetUnhandledExceptionFilter( Sys_Crash );
	host.hInst = GetModuleHandle( NULL );
	host.change_game = bChangeGame;
	host.config_executed = false;
	host.status = HOST_INIT; // initialzation started

	Memory_Init(); // init memory subsystem

	progname[0] = cmdline[0] = '\0';
	in = (char *)hostname;
	out = progname;

	while( *in != '\0' )
	{
		if( parse_cmdline )
		{
			*out++ = *in++;
		}
		else
		{
			if( *in == ' ' )
			{
				parse_cmdline = true;
				*out++ = '\0';
				out = cmdline;
			}
			else *out++ = *in++; 
		}
	}
	*out = '\0'; // write terminator

	Sys_ParseCommandLine( GetCommandLine( ), false );
	SetErrorMode( SEM_FAILCRITICALERRORS );	// no abort/retry/fail errors

	host.mempool = Mem_AllocPool( "Zone Engine" );

	// HACKHACK: Quake console is always allowed
	if( Sys_CheckParm( "-console" ) || !Q_stricmp( progname, "id1" ))
		host.allow_console = true;

	if( Sys_CheckParm( "-dev" ))
	{
		host.allow_console = true;
		developer = DEV_NORMAL;

		if( Sys_GetParmFromCmdLine( "-dev", dev_level ))
		{
			if( Q_isdigit( dev_level ))
				developer = bound( DEV_NONE, abs( Q_atoi( dev_level )), DEV_EXTENDED );
		}
	}

	host.type = HOST_NORMAL; // predict state
	host.con_showalways = true;

	// we can specified custom name, from Sys_NewInstance
	if( GetModuleFileName( NULL, szTemp, sizeof( szTemp )) && !host.change_game )
		COM_FileBase( szTemp, SI.exeName );

	COM_ExtractFilePath( szTemp, szRootPath );
	if( Q_stricmp( host.rootdir, szRootPath ))
	{
		Q_strncpy( host.rootdir, szRootPath, sizeof( host.rootdir ));
		SetCurrentDirectory( host.rootdir );
	}

	if( SI.exeName[0] == '#' ) host.type = HOST_DEDICATED; 

	// determine host type
	if( progname[0] == '#' )
	{
		Q_strncpy( SI.basedirName, progname + 1, sizeof( SI.basedirName ));
		host.type = HOST_DEDICATED;
	}
	else Q_strncpy( SI.basedirName, progname, sizeof( SI.basedirName )); 

	if( Sys_CheckParm( "-dedicated" ))
		host.type = HOST_DEDICATED;

	if( host.type == HOST_DEDICATED )
	{
		// check for duplicate dedicated server
		host.hMutex = CreateMutex( NULL, 0, "Xash Dedicated Server" );

		if( !host.hMutex )
		{
			MSGBOX( "Dedicated server already running" );
			Sys_Quit();
			return;
		}

		Sys_MergeCommandLine( cmdline );

		CloseHandle( host.hMutex );
		host.hMutex = CreateSemaphore( NULL, 0, 1, "Xash Dedicated Server" );
		host.allow_console = true;
	}
	else
	{
		// don't show console as default
		if( developer <= DEV_NORMAL )
			host.con_showalways = false;
	}

	// member console allowing
	host.allow_console_init = host.allow_console;

	timeBeginPeriod( 1 );

	Con_CreateConsole(); // system console used by dedicated server or show fatal errors

	// NOTE: this message couldn't be passed into game console but it doesn't matter
	MsgDev( D_NOTE, "Sys_LoadLibrary: Loading xash.dll - ok\n" );

	// get default screen res
	VID_InitDefaultResolution();

	// init host state machine
	COM_InitHostState();

	// startup cmds and cvars subsystem
	Cmd_Init();
	Cvar_Init();

	// share developer level across all dlls
	Q_snprintf( dev_level, sizeof( dev_level ), "%i", developer );
	Cvar_DirectSet( &host_developer, dev_level );
	Cvar_RegisterVariable( &sys_ticrate );

	if( Sys_GetParmFromCmdLine( "-sys_ticrate", ticrate ))
	{
		fps = bound( MIN_FPS, atof( ticrate ), MAX_FPS );
		Cvar_SetValue( "sys_ticrate", fps );
	}

	Con_Init(); // early console running to catch all the messages
	Cmd_AddCommand( "exec", Host_Exec_f, "execute a script file" );
	Cmd_AddCommand( "memlist", Host_MemStats_f, "prints memory pool information" );

	FS_Init();
	Image_Init();
	Sound_Init();

	FS_LoadGameInfo( NULL );
	Q_strncpy( host.gamefolder, GI->gamefolder, sizeof( host.gamefolder ));

	if( GI->secure )
	{
		// clear all developer levels when game is protected
		Cvar_DirectSet( &host_developer, "0" );
		host.allow_console_init = false;
		host.con_showalways = false;
		host.allow_console = false;
	}
	HPAK_Init();

	IN_Init();
	Key_Init();
}

void Host_FreeCommon( void )
{
	Image_Shutdown();
	Sound_Shutdown();
	Netchan_Shutdown();
	HPAK_FlushHostQueue();
	FS_Shutdown();
}

/*
=================
Host_Main
=================
*/
int EXPORT Host_Main( const char *progname, int bChangeGame, pfnChangeGame func )
{
	static double	oldtime, newtime;

	pChangeGame = func;	// may be NULL

	Host_InitCommon( progname, bChangeGame );

	// init commands and vars
	if( host_developer.value >= DEV_EXTENDED )
	{
		Cmd_AddCommand ( "sys_error", Sys_Error_f, "just throw a fatal error to test shutdown procedures");
		Cmd_AddCommand ( "host_error", Host_Error_f, "just throw a host error to test shutdown procedures");
		Cmd_AddCommand ( "crash", Host_Crash_f, "a way to force a bus error for development reasons");
	}

	host_maxfps = Cvar_Get( "fps_max", "72", FCVAR_ARCHIVE, "host fps upper limit" );
	host_framerate = Cvar_Get( "host_framerate", "0", 0, "locks frame timing to this value in seconds" );  
	host_gameloaded = Cvar_Get( "host_gameloaded", "0", FCVAR_READ_ONLY, "inidcates a loaded game.dll" );
	host_clientloaded = Cvar_Get( "host_clientloaded", "0", FCVAR_READ_ONLY, "inidcates a loaded client.dll" );
	host_limitlocal = Cvar_Get( "host_limitlocal", "0", 0, "apply cl_cmdrate and rate to loopback connection" );
	con_gamemaps = Cvar_Get( "con_mapfilter", "1", FCVAR_ARCHIVE, "when true show only maps in game folder" );
	build = Cvar_Get( "build", va( "%i", Q_buildnum()), FCVAR_READ_ONLY, "returns a current build number" );
	ver = Cvar_Get( "ver", va( "%i/%g (hw build %i)", PROTOCOL_VERSION, XASH_VERSION, Q_buildnum()), FCVAR_READ_ONLY, "shows an engine version" );

	Mod_Init();
	NET_Init();
	Netchan_Init();

	// allow to change game from the console
	if( pChangeGame != NULL )
	{
		Cmd_AddCommand( "game", Host_ChangeGame_f, "change game" );
		Cvar_Get( "host_allow_changegame", "1", FCVAR_READ_ONLY, "allows to change games" );
	}
	else
	{
		Cvar_Get( "host_allow_changegame", "0", FCVAR_READ_ONLY, "allows to change games" );
	}

	SV_Init();
	CL_Init();

	if( host.type == HOST_DEDICATED )
	{
		Con_InitConsoleCommands ();

		Cmd_AddCommand( "quit", Sys_Quit, "quit the game" );
		Cmd_AddCommand( "exit", Sys_Quit, "quit the game" );
	}
	else Cmd_AddCommand( "minimize", Host_Minimize_f, "minimize main window to tray" );

	host.errorframe = 0;

	// post initializations
	switch( host.type )
	{
	case HOST_NORMAL:
		Con_ShowConsole( false ); // hide console
		// execute startup config and cmdline
		Cbuf_AddText( va( "exec %s.rc\n", SI.rcName ));
		Cbuf_Execute();
		if( !host.config_executed )
		{
			Cbuf_AddText( "exec config.cfg\n" );
			Cbuf_Execute();
		}
		break;
	case HOST_DEDICATED:
		// allways parse commandline in dedicated-mode
		host.stuffcmds_pending = true;
		break;
	}

	host.change_game = false;	// done
	Cmd_RemoveCommand( "setgl" );
	Cbuf_ExecStuffCmds();	// execute stuffcmds (commandline)
	SCR_CheckStartupVids();	// must be last

	oldtime = Sys_DoubleTime() - 0.1;

	if( host.type == HOST_DEDICATED && GameState->nextstate == STATE_RUNFRAME )
		Con_Printf( "type 'map <mapname>' to run server... (TAB-autocomplete is working too)\n" );

	// main window message loop
	while( !host.crashed )
	{
		newtime = Sys_DoubleTime ();
		COM_Frame( newtime - oldtime );
		oldtime = newtime;
	}

	// never reached
	return 0;
}

/*
=================
Host_Shutdown
=================
*/
void EXPORT Host_Shutdown( void )
{
	if( host.shutdown_issued ) return;
	host.shutdown_issued = true;

	if( host.status != HOST_ERR_FATAL ) host.status = HOST_SHUTDOWN; // prepare host to normal shutdown
	if( !host.change_game ) Q_strncpy( host.finalmsg, "Server shutdown", sizeof( host.finalmsg ));

	if( host.type == HOST_NORMAL )
		Host_WriteConfig();

	SV_Shutdown( "Server shutdown\n" );
	CL_Shutdown();

	Mod_Shutdown();
	NET_Shutdown();
	Host_FreeCommon();
	Con_DestroyConsole();

	// must be last, console uses this
	Mem_FreePool( &host.mempool );

	// restore filter	
	if( host.oldFilter ) SetUnhandledExceptionFilter( host.oldFilter );
}

// main DLL entry point
BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
{
	hCurrent = hinstDLL;
	return TRUE;
}