quakeforge/qw/source/sv_sys_unix.c

/*
	sv_sys_unix.c

	(description)

	Copyright (C) 1996-1997  Id Software, Inc.
	Copyright (C) 2000       Marcus Sundberg [mackan@stacken.kth.se]

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

*/
static const char rcsid[] = 
	"$Id$";

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>

#include "QF/cvar.h"
#include "QF/qargs.h"
#include "QF/sys.h"

#include "server.h"

#ifdef NeXT
# include <libc.h>
#endif

qboolean    is_server = true;
qboolean    stdin_ready;
server_static_t svs;
info_t    **svs_info = &svs.info;

#ifdef __alpha__
static inline unsigned long
rdfpcr(void)
{
	unsigned long tmp, ret;

#if defined(__alpha_cix__) || defined(__alpha_fix__)
	__asm__ __volatile__ (
		"ftoit $f0,%0\n\t"
		"mf_fpcr $f0\n\t"
		"ftoit $f0,%1\n\t"
		"itoft %0,$f0"
		: "=r"(tmp), "=r"(ret));
#else
	__asm__ __volatile__ (
		"stt $f0,%0\n\t"
		"mf_fpcr $f0\n\t"
		"stt $f0,%1\n\t"
		"ldt $f0,%0"
		: "=m"(tmp), "=m"(ret));
#endif

	return ret;
}

static inline void
wrfpcr(unsigned long val)
{
	unsigned long tmp;

#if defined(__alpha_cix__) || defined(__alpha_fix__)
	__asm__ __volatile__ (
		"ftoit $f0,%0\n\t"
		"itoft %1,$f0\n\t"
		"mt_fpcr $f0\n\t"
		"itoft %0,$f0"
		: "=&r"(tmp) : "r"(val));
#else
	__asm__ __volatile__ (
		"stt $f0,%0\n\t"
		"ldt $f0,%1\n\t"
		"mt_fpcr $f0\n\t"
		"ldt $f0,%0"
		: "=m"(tmp) : "m"(val));
#endif
}
#endif

void
Sys_Init (void)
{
#ifdef USE_INTEL_ASM
	Sys_SetFPCW ();
#endif
#ifdef __alpha__
	wrfpcr (rdfpcr () | 1L << 47);
#endif
}

static int  do_stdin = 1;

/*
	Sys_ConsoleInput

	Checks for a complete line of text typed in at the console, then forwards
	it to the host command processor
*/
const char *
Sys_ConsoleInput (void)
{
	static char text[256];
	int         len;

	if (!stdin_ready || !do_stdin)
		return NULL;					// the select didn't say it was ready
	stdin_ready = false;

	len = read (0, text, sizeof (text));
	if (len == 0) {
		// end of file
		do_stdin = 0;
		return NULL;
	}
	if (len < 1)
		return NULL;
	text[len - 1] = 0;					// rip off the \n and terminate

	return text;
}

int
main (int argc, const char *argv[])
{
	double      time, oldtime, newtime;
	fd_set      fdset;

	memset (&host_parms, 0, sizeof (host_parms));

	COM_InitArgv (argc, argv);
	host_parms.argc = com_argc;
	host_parms.argv = com_argv;

	SV_Init ();

	Sys_RegisterShutdown (Net_LogStop);

	// run one frame immediately for first heartbeat
	SV_Frame (0.1);

	// main loop
	oldtime = Sys_DoubleTime () - 0.1;
	while (1) {
		struct timeval _timeout;
		struct timeval *timeout = 0;
		// select on the net socket and stdin
		// the only reason we have a timeout at all is so that if the last
		// connected client times out, the message would not otherwise
		// be printed until the next event.
		FD_ZERO (&fdset);
		if (do_stdin)
			FD_SET (0, &fdset);
		FD_SET (net_socket, &fdset);

		_timeout.tv_sec = 0;
		_timeout.tv_usec = 10000;
		if (svs.num_clients || !sys_dead_sleep->int_val)
			timeout = &_timeout;

		if (select (net_socket + 1, &fdset, NULL, NULL, timeout) == -1
			&& errno != EINTR)
			continue;
		stdin_ready = FD_ISSET (0, &fdset);

		// find time passed since last cycle
		newtime = Sys_DoubleTime ();
		time = newtime - oldtime;
		oldtime = newtime;

		SV_Frame (time);

		// extrasleep is just a way to generate a fucked up connection on
		// purpose
		if (sys_extrasleep->int_val)
			usleep (sys_extrasleep->int_val);
	}
	return 1;
}