ref: fd0c011dcc9d56d366d62c38695d5e8dd47643c7
dir: /src/i_system.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// 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:
//
//-----------------------------------------------------------------------------
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <unistd.h>
#endif
#include "config.h"
#include "deh_str.h"
#include "doomtype.h"
#include "m_argv.h"
#include "m_config.h"
#include "m_misc.h"
#include "i_joystick.h"
#include "i_sound.h"
#include "i_timer.h"
#include "i_video.h"
#include "i_system.h"
#include "w_wad.h"
#include "z_zone.h"
#define DEFAULT_RAM 16 /* MiB */
#define MIN_RAM 4 /* MiB */
typedef struct atexit_listentry_s atexit_listentry_t;
struct atexit_listentry_s
{
atexit_func_t func;
boolean run_on_error;
atexit_listentry_t *next;
};
static atexit_listentry_t *exit_funcs = NULL;
void I_AtExit(atexit_func_t func, boolean run_on_error)
{
atexit_listentry_t *entry;
entry = malloc(sizeof(*entry));
entry->func = func;
entry->run_on_error = run_on_error;
entry->next = exit_funcs;
exit_funcs = entry;
}
// Tactile feedback function, probably used for the Logitech Cyberman
void I_Tactile(int on, int off, int total)
{
}
#ifdef _WIN32_WCE
// Windows CE-specific auto-allocation function that allocates the zone
// size based on the amount of memory reported free by the OS.
static byte *AutoAllocMemory(int *size, int default_ram, int min_ram)
{
MEMORYSTATUS memory_status;
byte *zonemem;
size_t available;
// Get available physical RAM. We leave one megabyte extra free
// for the OS to keep running (my PDA becomes unstable if too
// much RAM is allocated)
GlobalMemoryStatus(&memory_status);
available = memory_status.dwAvailPhys - 2 * 1024 * 1024;
// Limit to default_ram if we have more than that available:
if (available > default_ram * 1024 * 1024)
{
available = default_ram * 1024 * 1024;
}
if (available < min_ram * 1024 * 1024)
{
I_Error("Unable to allocate %i MiB of RAM for zone", min_ram);
}
// Allocate zone:
*size = available;
zonemem = malloc(*size);
if (zonemem == NULL)
{
I_Error("Failed when allocating %i bytes", *size);
}
return zonemem;
}
#else
// Zone memory auto-allocation function that allocates the zone size
// by trying progressively smaller zone sizes until one is found that
// works.
static byte *AutoAllocMemory(int *size, int default_ram, int min_ram)
{
byte *zonemem;
// Allocate the zone memory. This loop tries progressively smaller
// zone sizes until a size is found that can be allocated.
// If we used the -mb command line parameter, only the parameter
// provided is accepted.
zonemem = NULL;
while (zonemem == NULL)
{
// We need a reasonable minimum amount of RAM to start.
if (default_ram < min_ram)
{
I_Error("Unable to allocate %i MiB of RAM for zone", default_ram);
}
// Try to allocate the zone memory.
*size = default_ram * 1024 * 1024;
zonemem = malloc(*size);
// Failed to allocate? Reduce zone size until we reach a size
// that is acceptable.
if (zonemem == NULL)
{
default_ram -= 1;
}
}
return zonemem;
}
#endif
byte *I_ZoneBase (int *size)
{
byte *zonemem;
int min_ram, default_ram;
int p;
//!
// @arg <mb>
//
// Specify the heap size, in MiB (default 16).
//
p = M_CheckParm("-mb");
if (p > 0)
{
default_ram = atoi(myargv[p+1]);
min_ram = default_ram;
}
else
{
default_ram = DEFAULT_RAM;
min_ram = MIN_RAM;
}
zonemem = AutoAllocMemory(size, default_ram, min_ram);
printf("zone memory: %p, %x allocated for zone\n",
zonemem, *size);
return zonemem;
}
void I_PrintBanner(char *msg)
{
int i;
int spaces = 35 - (strlen(msg) / 2);
for (i=0; i<spaces; ++i)
putchar(' ');
puts(msg);
}
void I_PrintDivider(void)
{
int i;
for (i=0; i<75; ++i)
{
putchar('=');
}
putchar('\n');
}
void I_PrintStartupBanner(char *gamedescription)
{
I_PrintDivider();
I_PrintBanner(gamedescription);
I_PrintDivider();
printf(
" " PACKAGE_NAME " is free software, covered by the GNU General Public\n"
" License. There is NO warranty; not even for MERCHANTABILITY or FITNESS\n"
" FOR A PARTICULAR PURPOSE. You are welcome to change and distribute\n"
" copies under certain conditions. See the source for more information.\n");
I_PrintDivider();
}
//
// I_ConsoleStdout
//
// Returns true if stdout is a real console, false if it is a file
//
boolean I_ConsoleStdout(void)
{
#ifdef _WIN32
// SDL "helpfully" always redirects stdout to a file.
return 0;
#else
return isatty(fileno(stdout));
#endif
}
//
// I_Init
//
/*
void I_Init (void)
{
I_CheckIsScreensaver();
I_InitTimer();
I_InitJoystick();
}
void I_BindVariables(void)
{
I_BindVideoVariables();
I_BindJoystickVariables();
I_BindSoundVariables();
}
*/
//
// I_Quit
//
void I_Quit (void)
{
atexit_listentry_t *entry;
// Run through all exit functions
entry = exit_funcs;
while (entry != NULL)
{
entry->func();
entry = entry->next;
}
exit(0);
}
//
// I_Error
//
static boolean already_quitting = false;
void I_Error (char *error, ...)
{
va_list argptr;
atexit_listentry_t *entry;
if (already_quitting)
{
fprintf(stderr, "Warning: recursive call to I_Error detected.\n");
exit(-1);
}
else
{
already_quitting = true;
}
// Message first.
va_start(argptr, error);
fprintf(stderr, "\nError: ");
vfprintf(stderr, error, argptr);
fprintf(stderr, "\n");
va_end(argptr);
fflush(stderr);
// Shutdown. Here might be other errors.
entry = exit_funcs;
while (entry != NULL)
{
if (entry->run_on_error)
{
entry->func();
}
entry = entry->next;
}
#ifdef _WIN32
// On Windows, pop up a dialog box with the error message.
{
char msgbuf[512];
wchar_t wmsgbuf[512];
va_start(argptr, error);
memset(msgbuf, 0, sizeof(msgbuf));
vsnprintf(msgbuf, sizeof(msgbuf) - 1, error, argptr);
va_end(argptr);
MultiByteToWideChar(CP_ACP, 0,
msgbuf, strlen(msgbuf) + 1,
wmsgbuf, sizeof(wmsgbuf));
MessageBoxW(NULL, wmsgbuf, L"Error", MB_OK);
}
#endif
// abort();
exit(-1);
}