*/
// sys_win.c -- Win32 system interface code
+#define WIN32_USETIMEGETTIME 0
+
#include "quakedef.h"
#include "winquake.h"
#include "errno.h"
int starttime;
qboolean ActiveApp, Minimized;
-qboolean WinNT;
-static double pfreq;
-static double curtime = 0.0;
-static double lastcurtime = 0.0;
-static int lowshift;
qboolean isDedicated;
static qboolean sc_return_on_enter = false;
HANDLE hinput, houtput;
static HANDLE heventParent;
static HANDLE heventChild;
-void Sys_InitFloatTime (void);
-
volatile int sys_checksum;
===============================================================================
*/
-#if NOTUSED
-/*
-================
-Sys_MakeCodeWriteable
-================
-*/
-void Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
-{
- DWORD flOldProtect;
-
- if (!VirtualProtect((LPVOID)startaddr, length, PAGE_READWRITE, &flOldProtect))
- Sys_Error("Protection change failed\n");
-}
-#endif
-
-
-/*
-================
-Sys_Init
-================
-*/
-void Sys_Init (void)
-{
- LARGE_INTEGER PerformanceFreq;
- unsigned int lowpart, highpart;
- OSVERSIONINFO vinfo;
-
- if (!QueryPerformanceFrequency (&PerformanceFreq))
- Sys_Error ("No hardware timer available");
-
-// get 32 out of the 64 time bits such that we have around
-// 1 microsecond resolution
-#ifdef __BORLANDC__
- lowpart = (unsigned int)PerformanceFreq.u.LowPart;
- highpart = (unsigned int)PerformanceFreq.u.HighPart;
-#else
- lowpart = (unsigned int)PerformanceFreq.LowPart;
- highpart = (unsigned int)PerformanceFreq.HighPart;
-#endif
- lowshift = 0;
-
- while (highpart || (lowpart > 2000000.0))
- {
- lowshift++;
- lowpart >>= 1;
- lowpart |= (highpart & 1) << 31;
- highpart >>= 1;
- }
-
- pfreq = 1.0 / (double)lowpart;
-
- Sys_InitFloatTime ();
-
- vinfo.dwOSVersionInfoSize = sizeof(vinfo);
-
- if (!GetVersionEx (&vinfo))
- Sys_Error ("Couldn't get OS info");
-
- if ((vinfo.dwMajorVersion < 4) ||
- (vinfo.dwPlatformId == VER_PLATFORM_WIN32s))
- {
- Sys_Error ("WinQuake requires at least Win95 or NT 4.0");
- }
-
- if (vinfo.dwPlatformId == VER_PLATFORM_WIN32_NT)
- WinNT = true;
- else
- WinNT = false;
-}
-
-
void Sys_Error (char *error, ...)
{
va_list argptr;
WriteFile (houtput, text4, strlen (text4), &dummy, NULL);
- starttime = Sys_FloatTime ();
+ starttime = Sys_DoubleTime ();
sc_return_on_enter = true; // so Enter will get us out of here
while (!Sys_ConsoleInput () &&
- ((Sys_FloatTime () - starttime) < CONSOLE_ERROR_TIMEOUT))
+ ((Sys_DoubleTime () - starttime) < CONSOLE_ERROR_TIMEOUT))
{
}
}
/*
================
-Sys_FloatTime
+Sys_DoubleTime
================
*/
-double Sys_FloatTime (void)
+double Sys_DoubleTime (void)
{
- static int sametimecount;
- static unsigned int oldtime;
- static int first = 1;
- LARGE_INTEGER PerformanceCount;
- unsigned int temp, t2;
- double time;
+ // LordHavoc: note to people modifying this code, DWORD is specifically defined as an unsigned 32bit number, therefore the 65536.0 * 65536.0 is fine.
+#if WIN32_USETIMEGETTIME
+ // timeGetTime
+ // platform:
+ // Windows 95/98/ME/NT/2000
+ // features:
+ // reasonable accuracy (millisecond)
+ // issues:
+ // none known
+ static int first = true;
+ static double oldtime = 0.0, basetime = 0.0, old = 0.0;
+ double newtime, now;
+
+ now = (double) timeGetTime () - basetime;
- QueryPerformanceCounter (&PerformanceCount);
-
-#ifdef __BORLANDC__
- temp = ((unsigned int)PerformanceCount.u.LowPart >> lowshift) |
- ((unsigned int)PerformanceCount.u.HighPart << (32 - lowshift));
-#else
-
- temp = ((unsigned int)PerformanceCount.LowPart >> lowshift) |
- ((unsigned int)PerformanceCount.HighPart << (32 - lowshift));
-#endif
if (first)
{
- oldtime = temp;
- first = 0;
+ first = false;
+ basetime = now;
+ now = 0;
}
- else
- {
- // check for turnover or backward time
- if ((temp <= oldtime) && ((oldtime - temp) < 0x10000000))
- {
- oldtime = temp; // so we can't get stuck
- }
- else
- {
- t2 = temp - oldtime;
-
- time = (double)t2 * pfreq;
- oldtime = temp;
- curtime += time;
+ if (now < old)
+ {
+ // wrapped
+ basetime -= (65536.0 * 65536.0);
+ now += (65536.0 * 65536.0);
+ }
+ old = now;
- if (curtime == lastcurtime)
- {
- sametimecount++;
+ newtime = now / 1000.0;
- if (sametimecount > 100000)
- {
- curtime += 1.0;
- sametimecount = 0;
- }
- }
- else
- {
- sametimecount = 0;
- }
+ if (newtime < oldtime)
+ Sys_Error("Sys_DoubleTime: time running backwards??\n");
- lastcurtime = curtime;
- }
- }
+ oldtime = newtime;
- return curtime;
-}
+ return newtime;
+#else
+ // QueryPerformanceCounter
+ // platform:
+ // Windows 95/98/ME/NT/2000
+ // features:
+ // very accurate (CPU cycles)
+ // known issues:
+ // does not necessarily match realtime too well (tends to get faster and faster in win98)
+ static int first = true;
+ static double oldtime = 0.0, basetime = 0.0, timescale = 0.0;
+ double newtime;
+ LARGE_INTEGER PerformanceFreq;
+ LARGE_INTEGER PerformanceCount;
+ if (first)
+ {
+ if (!QueryPerformanceFrequency (&PerformanceFreq))
+ Sys_Error ("No hardware timer available");
-/*
-================
-Sys_InitFloatTime
-================
-*/
-void Sys_InitFloatTime (void)
-{
- int j;
+#ifdef __BORLANDC__
+ timescale = 1.0 / ((double) PerformanceFreq.u.LowPart + (double) PerformanceFreq.u.HighPart * 65536.0 * 65536.0);
+#else
+ timescale = 1.0 / ((double) PerformanceFreq.LowPart + (double) PerformanceFreq.HighPart * 65536.0 * 65536.0);
+#endif
+ }
- Sys_FloatTime ();
+ QueryPerformanceCounter (&PerformanceCount);
- j = COM_CheckParm("-starttime");
+#ifdef __BORLANDC__
+ newtime = ((double) PerformanceCount.u.LowPart + (double) PerformanceCount.u.HighPart * 65536.0 * 65536.0) * timescale - basetime;
+#else
+ newtime = ((double) PerformanceCount.LowPart + (double) PerformanceCount.HighPart * 65536.0 * 65536.0) * timescale - basetime;
+#endif
- if (j)
- {
- curtime = (double) (atof(com_argv[j+1]));
- }
- else
+ if (first)
{
- curtime = 0.0;
+ first = false;
+ basetime = newtime;
+ newtime = 0;
}
- lastcurtime = curtime;
+ if (newtime < oldtime)
+ Sys_Error("Sys_DoubleTime: time running backwards??\n");
+
+ oldtime = newtime;
+
+ return newtime;
+#endif
}
InitConProc (hFile, heventParent, heventChild);
}
- Sys_Init ();
-
// because sound is off until we become active
S_BlockSound ();
+#if WIN32_USETIMEGETTIME
+ // make sure the timer is high precision, otherwise NT gets 18ms resolution
+ // LordHavoc:
+ // Windows 2000 Advanced Server (and possibly other versions)
+ // apparently have a broken timer, because it runs at more like 10x speed
+ // if this isn't used, heh
+ timeBeginPeriod (1);
+#endif
+
Sys_Printf ("Host_Init\n");
Host_Init ();
- oldtime = Sys_FloatTime ();
+ oldtime = Sys_DoubleTime ();
/* main window message loop */
while (1)
{
- if (isDedicated)
- {
- newtime = Sys_FloatTime ();
- time = newtime - oldtime;
-
- while (time < sys_ticrate.value )
- {
- Sys_Sleep();
- newtime = Sys_FloatTime ();
- time = newtime - oldtime;
- }
- }
- else
+ if (!isDedicated)
{
// yield the CPU for a little while when paused, minimized, or not the focus
if ((cl.paused && (!ActiveApp && !DDActive)) || Minimized)
{
SleepUntilInput (NOT_FOCUS_SLEEP);
}
- /*
- else if (!cls.timedemo && time < (timediff = 1.0 / maxfps.value))
- {
- newtime = Sys_FloatTime ();
- time = newtime - oldtime;
-
- while (time < timediff)
- {
- Sys_Sleep();
- newtime = Sys_FloatTime ();
- time = newtime - oldtime;
- }
- }
- */
- newtime = Sys_FloatTime ();
+ newtime = Sys_DoubleTime ();
time = newtime - oldtime;
}
projects / xonotic / darkplaces.git / blobdiff