quakeforge/qw/source/cl_sys_unix.c

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/*
cl_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
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <signal.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/mman.h>
#include "QF/cvar.h"
#include "host.h"
#include "QF/qargs.h"
#include "QF/sys.h"
int noconinput = 0;
qboolean is_server = false;
char *svs_info;
#ifdef PACKET_LOGGING
void Net_LogStop (void);
#endif
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// General routines ======================================================
void
Sys_Quit (void)
{
Host_Shutdown ();
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~O_NONBLOCK);
#ifdef PACKET_LOGGING
Net_LogStop();
#endif
exit (0);
}
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void
Sys_Init_Cvars (void)
{
sys_nostdout = Cvar_Get ("sys_nostdout", "0", CVAR_NONE, NULL,
"set to disable std out");
if (COM_CheckParm ("-nostdout"))
Cvar_Set (sys_nostdout, "1");
}
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void
Sys_Init (void)
{
#ifdef USE_INTEL_ASM
Sys_SetFPCW ();
#endif
}
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void
Sys_Error (const char *error, ...)
{
va_list argptr;
char string[1024];
// change stdin to non blocking
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~O_NONBLOCK);
va_start (argptr, error);
vsnprintf (string, sizeof (string), error, argptr);
va_end (argptr);
fprintf (stderr, "Error: %s\n", string);
Host_Shutdown ();
exit (1);
}
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void
Sys_Warn (char *warning, ...)
{
va_list argptr;
char string[1024];
va_start (argptr, warning);
vsnprintf (string, sizeof (string), warning, argptr);
va_end (argptr);
fprintf (stderr, "Warning: %s", string);
}
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void
Sys_DebugLog (char *file, char *fmt, ...)
{
va_list argptr;
static char data[1024]; // why static ?
int fd;
va_start (argptr, fmt);
vsnprintf (data, sizeof (data), fmt, argptr);
va_end (argptr);
// fd = open(file, O_WRONLY | O_BINARY | O_CREAT | O_APPEND, 0666);
fd = open (file, O_WRONLY | O_CREAT | O_APPEND, 0666);
write (fd, data, strlen (data));
close (fd);
}
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void
floating_point_exception_handler (int whatever)
{
// Sys_Warn("floating point exception\n");
signal (SIGFPE, floating_point_exception_handler);
}
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char *
Sys_ConsoleInput (void)
{
#if 0
static char text[256];
int len;
if (cls.state == ca_dedicated) {
len = read (0, text, sizeof (text));
if (len < 1)
return NULL;
text[len - 1] = 0; // rip off the /n and terminate
return text;
}
#endif
return NULL;
}
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#ifndef USE_INTEL_ASM
void
Sys_HighFPPrecision (void)
{
}
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void
Sys_LowFPPrecision (void)
{
}
#endif
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int skipframes;
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int
main (int c, char **v)
{
double time, oldtime, newtime;
int j;
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// static char cwd[1024];
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// signal(SIGFPE, floating_point_exception_handler);
signal (SIGFPE, SIG_IGN);
memset (&host_parms, 0, sizeof (host_parms));
COM_InitArgv (c, v);
host_parms.argc = com_argc;
host_parms.argv = com_argv;
host_parms.memsize = 16 * 1024 * 1024; // 16MB default heap
j = COM_CheckParm ("-mem");
if (j)
host_parms.memsize = (int) (atof (com_argv[j + 1]) * 1024 * 1024);
host_parms.membase = malloc (host_parms.memsize);
if (!host_parms.membase) {
printf ("Can't allocate memory for zone.\n");
return 1;
}
noconinput = COM_CheckParm ("-noconinput");
if (!noconinput)
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) | O_NONBLOCK);
Host_Init ();
oldtime = Sys_DoubleTime ();
while (1) {
// find time spent rendering last frame
newtime = Sys_DoubleTime ();
time = newtime - oldtime;
Host_Frame (time);
oldtime = newtime;
}
}
void
Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
{
int r;
unsigned long addr;
int psize = getpagesize ();
addr = (startaddr & ~(psize - 1)) - psize;
// fprintf(stderr, "writable code %lx(%lx)-%lx, length=%lx\n", startaddr,
// addr, startaddr+length, length);
r = mprotect ((char *) addr, length + startaddr - addr + psize, 7);
if (r < 0)
Sys_Error ("Protection change failed\n");
}