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Replace separate timer implementations in SDL and Winlayer with a shared implementation based on std::chrono

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git-svn-id: https://svn.eduke32.com/eduke32@7976 1a8010ca-5511-0410-912e-c29ae57300e0

# Conflicts:
#	platform/Windows/build.vcxproj
#	platform/Windows/build.vcxproj.filters
#	source/build/src/mdsprite.cpp
This commit is contained in:
terminx 2019-08-13 14:44:16 +00:00 • committed by Christoph Oelckers
parent 55e3188afb
commit 04811f21f4
12 changed files with 91 additions and 345 deletions
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117
source/build/src/sdlayer.cpp
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@ -1169,123 +1169,6 @@ void joyGetDeadZone(int32_t axis, uint16_t *dead, uint16_t *satur)
//
//
static uint32_t timerfreq;
static uint32_t timerlastsample;
int32_t timerticspersec=0;
static double msperu64tick = 0;
static void(*usertimercallback)(void) = NULL;
//
// inittimer() -- initialize timer
//
int32_t timerInit(int32_t tickspersecond)
{
if (timerfreq) return 0; // already installed
// initprintf("Initializing timer\n");
#if defined(_WIN32) && SDL_MAJOR_VERSION == 1
int32_t t = win_inittimer();
if (t < 0)
return t;
#endif
timerfreq = 1000;
timerticspersec = tickspersecond;
timerlastsample = SDL_GetTicks() * timerticspersec / timerfreq;
usertimercallback = NULL;
msperu64tick = 1000.0 / (double)timerGetFreqU64();
return 0;
}
//
// uninittimer() -- shut down timer
//
void timerUninit(void)
{
timerfreq=0;
#if defined(_WIN32) && SDL_MAJOR_VERSION==1
win_timerfreq=0;
#endif
msperu64tick = 0;
}
//
// sampletimer() -- update totalclock
//
void timerUpdate(void)
{
if (!timerfreq) return;
int64_t i = SDL_GetTicks();
int32_t n = tabledivide64(i * timerticspersec, timerfreq) - timerlastsample;
if (n <= 0) return;
totalclock += n;
timerlastsample += n;
if (usertimercallback)
for (; n > 0; n--) usertimercallback();
}
#if defined LUNATIC
//
// getticks() -- returns the sdl ticks count
//
uint32_t timerGetTicks(void)
{
return (uint32_t)SDL_GetTicks();
}
#endif
// high-resolution timers for profiling
#if SDL_MAJOR_VERSION != 1
uint64_t timerGetTicksU64(void)
{
return SDL_GetPerformanceCounter();
}
uint64_t timerGetFreqU64(void)
{
return SDL_GetPerformanceFrequency();
}
#endif
// Returns the time since an unspecified starting time in milliseconds.
// (May be not monotonic for certain configurations.)
ATTRIBUTE((flatten))
double timerGetHiTicks(void)
{
return (double)timerGetTicksU64() * msperu64tick;
}
//
// gettimerfreq() -- returns the number of ticks per second the timer is configured to generate
//
int32_t timerGetFreq(void)
{
return timerticspersec;
}
//
// installusertimercallback() -- set up a callback function to be called when the timer is fired
//
void(*timerSetCallback(void(*callback)(void)))(void)
{
void(*oldtimercallback)(void);
oldtimercallback = usertimercallback;
usertimercallback = callback;
return oldtimercallback;
}