#include <cerrno>
#include <ctime>
-#include <stdexcept>
+#include <limits>
+#include <SDL/SDL.h>
+
+#include "Log.hh"
#include "Timer.hh"
#if HAVE_CONFIG_H
namespace Mf {
+Scalar Timer::gNextFire = std::numeric_limits<Scalar>::max();
+std::map<unsigned,Timer*> Timer::gTimers;
+
+
+unsigned Timer::getNewID()
+{
+ static unsigned id = 1;
+ return id++;
+}
+
+
+void Timer::init(const Function& function, Scalar seconds, Mode mode)
+{
+ invalidate();
+
+ mMode = mode;
+
+ if (mMode != INVALID)
+ {
+ mFunction = function;
+
+ if (mode == ACTUAL)
+ {
+ mAbsolute = seconds;
+ }
+ else
+ {
+ mAbsolute = seconds - getTicks();
+ mInterval = seconds;
+ }
+
+ mId = getNewID();
+ gTimers.insert(std::pair<unsigned,Timer*>(mId, this));
+
+ if (mAbsolute < gNextFire) gNextFire = mAbsolute;
+ }
+}
+
+
+bool Timer::isValid() const
+{
+ return mMode != INVALID;
+}
+
+void Timer::invalidate()
+{
+ if (mMode != INVALID)
+ {
+ gTimers.erase(mId);
+ mMode = INVALID;
+
+ if (isEqual(mAbsolute, gNextFire)) gNextFire = findNextFire();
+ }
+}
+
+
+void Timer::fire()
+{
+ Scalar t = getTicks();
+
+ if (mFunction) mFunction(*this, t);
+
+ if (isRepeating())
+ {
+ Scalar absolute = mAbsolute;
+
+ if (isEqual(mAbsolute, t, 1.0)) mAbsolute += mInterval;
+ else mAbsolute = mInterval + t;
+
+ if (isEqual(absolute, gNextFire)) gNextFire = findNextFire();
+ }
+ else
+ {
+ invalidate();
+ }
+}
+
+
+Scalar Timer::findNextFire()
+{
+ std::map<unsigned,Timer*>::iterator it;
+ Scalar nextFire = std::numeric_limits<Scalar>::max();
+
+ for (it = gTimers.begin(); it != gTimers.end(); ++it)
+ {
+ Scalar absolute = (*it).second->mAbsolute;
+ if (absolute < nextFire) nextFire = absolute;
+ }
+
+ return nextFire;
+}
+
+
+Scalar Timer::getSecondsRemaining() const
+{
+ return mAbsolute - getTicks();
+}
+
+bool Timer::isExpired() const
+{
+ return getSecondsRemaining() < 0.0;
+}
+
+bool Timer::isRepeating() const
+{
+ return mMode == REPEAT;
+}
+
+
+void Timer::fireIfExpired()
+{
+ fireIfExpired(getTicks());
+}
+
+void Timer::fireIfExpired(Scalar t)
+{
+ std::map<unsigned,Timer*>::iterator it;
+
+ if (gNextFire > t) return;
+
+ for (it = gTimers.begin(); it != gTimers.end(); ++it)
+ {
+ Timer* timer = (*it).second;
+ if (timer->isExpired()) timer->fire();
+ }
+}
+
+
#if HAVE_CLOCK_GETTIME
-// Since the monotonic clock will provide us with the timer since the computer
+// Since the monotonic clock will provide us with the time since the computer
// started, the number of seconds since that time could easily become so large
// that it cannot be accurately stored in a float (even with as little two days
// uptime), therefore we need to start from a more recent reference (when the
static const time_t reference = setReference_();
-Scalar getTicks()
+Scalar Timer::getTicks()
{
struct timespec ts;
- if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
- {
- throw std::runtime_error("cannot access monotonic clock");
- }
+ int result = clock_gettime(CLOCK_MONOTONIC, &ts);
+ ASSERT(result == 0 && "cannot access clock");
return Scalar(ts.tv_sec - reference) + Scalar(ts.tv_nsec) / 1000000000.0;
}
+void Timer::sleep(Scalar seconds, Mode mode)
+{
+ struct timespec ts;
+ int ret;
+
+ if (mode == ACTUAL) seconds -= getTicks();
+ ts.tv_sec = time_t(seconds);
+ ts.tv_nsec = long((seconds - Scalar(ts.tv_sec)) * 1000000000.0);
+
+ do
+ {
+ ret = nanosleep(&ts, &ts);
+ }
+ while (ret == -1 && errno == EINTR);
+}
+
#else // ! HAVE_CLOCK_GETTIME
// SDL only promises centisecond accuracy, but that's better than a kick in the
// butt.
-#include <SDL/SDL.h>
-
-Scalar getTicks()
+Scalar Timer::getTicks()
{
Uint32 ms = SDL_GetTicks();
return Scalar(ms / 1000) + Scalar(ms % 1000) / 1000.0;
}
-
-#endif // HAVE_CLOCK_GETTIME
-
-
-void sleep(Scalar seconds, bool absolute)
+void Timer::sleep(Scalar seconds, Mode mode)
{
- struct timespec ts;
- int ret;
-
- if (absolute) seconds -= getTicks();
- ts.tv_sec = time_t(seconds);
- ts.tv_nsec = long((seconds - Scalar(ts.tv_sec)) * 1000000000.0);
-
- do
- {
- ret = nanosleep(&ts, &ts);
- }
- while (ret == -1 && errno == EINTR);
+ if (mode == ACTUAL) seconds -= getTicks();
+ SDL_Delay(Uint32(cml::clamp(int(seconds * 1000.0), 0, 1000)));
}
+#endif // HAVE_CLOCK_GETTIME
+
} // namespace Mf