mirror of
https://github.com/DrBeef/DVR.git
synced 2024-12-21 01:51:11 +00:00
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/* Emacs style mode select -*- C++ -*-
|
|
*-----------------------------------------------------------------------------
|
|
*
|
|
*
|
|
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
|
|
* based on BOOM, a modified and improved DOOM engine
|
|
* Copyright (C) 1999 by
|
|
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
|
|
* Copyright (C) 1999-2006 by Colin Phipps, Florian Schulze
|
|
*
|
|
* Copyright 2005, 2006 by
|
|
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
|
|
*
|
|
* 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.
|
|
*
|
|
* DESCRIPTION:
|
|
* Misc system stuff needed by Doom, implemented for POSIX systems.
|
|
* Timers and signals.
|
|
*
|
|
*-----------------------------------------------------------------------------
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
#include <ctype.h>
|
|
#include <signal.h>
|
|
|
|
#include "doomtype.h"
|
|
#include "m_fixed.h"
|
|
#include "i_system.h"
|
|
#include "doomdef.h"
|
|
|
|
#ifdef __GNUG__
|
|
#pragma implementation "i_system.h"
|
|
#endif
|
|
#include "i_system.h"
|
|
|
|
void I_uSleep(unsigned long usecs)
|
|
{
|
|
#ifdef HAVE_USLEEP
|
|
usleep(usecs);
|
|
#else
|
|
/* Fall back on select(2) */
|
|
struct timeval tv = { usecs / 1000000, usecs % 1000000 };
|
|
select(0,NULL,NULL,NULL,&tv);
|
|
#endif
|
|
}
|
|
|
|
/* CPhipps - believe it or not, it is possible with consecutive calls to
|
|
* gettimeofday to receive times out of order, e.g you query the time twice and
|
|
* the second time is earlier than the first. Cheap'n'cheerful fix here.
|
|
* NOTE: only occurs with bad kernel drivers loaded, e.g. pc speaker drv
|
|
*/
|
|
|
|
static unsigned long lasttimereply;
|
|
static unsigned long basetime;
|
|
|
|
int I_GetTime_RealTime (void)
|
|
{
|
|
struct timeval tv;
|
|
struct timezone tz;
|
|
unsigned long thistimereply;
|
|
|
|
gettimeofday(&tv, &tz);
|
|
|
|
thistimereply = (tv.tv_sec * TICRATE + (tv.tv_usec * TICRATE) / 1000000);
|
|
|
|
/* Fix for time problem */
|
|
if (!basetime) {
|
|
basetime = thistimereply; thistimereply = 0;
|
|
} else thistimereply -= basetime;
|
|
|
|
if (thistimereply < lasttimereply)
|
|
thistimereply = lasttimereply;
|
|
|
|
return (lasttimereply = thistimereply);
|
|
}
|
|
|
|
/*
|
|
* I_GetRandomTimeSeed
|
|
*
|
|
* CPhipps - extracted from G_ReloadDefaults because it is O/S based
|
|
*/
|
|
unsigned long I_GetRandomTimeSeed(void)
|
|
{
|
|
/* killough 3/26/98: shuffle random seed, use the clock */
|
|
struct timeval tv;
|
|
struct timezone tz;
|
|
gettimeofday(&tv,&tz);
|
|
return (tv.tv_sec*1000ul + tv.tv_usec/1000ul);
|
|
}
|
|
|
|
/* cphipps - I_GetVersionString
|
|
* Returns a version string in the given buffer
|
|
*/
|
|
const char* I_GetVersionString(char* buf, size_t sz)
|
|
{
|
|
snprintf(buf,sz,"LxDoom v%s (http://lxdoom.linuxgames.com/)",VERSION);
|
|
return buf;
|
|
}
|
|
|
|
/* cphipps - I_SigString
|
|
* Returns a string describing a signal number
|
|
*/
|
|
const char* I_SigString(char* buf, size_t sz, int signum)
|
|
{
|
|
#ifdef SYS_SIGLIST_DECLARED
|
|
if (strlen(sys_siglist[signum]) < sz)
|
|
strcpy(buf,sys_siglist[signum]);
|
|
else
|
|
#endif
|
|
sprintf(buf,"signal %d",signum);
|
|
return buf;
|
|
}
|