X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FMoof%2FTimer.cc;h=a4dcf4047dfcc591f327accff93fa46039f7febc;hp=bc7aae220416687747de6f29bf07c39fc39a3f67;hb=cfe38a72ab859538db6269bc9b97f55e8f1f8709;hpb=57b78ebe21b1b48acd337daa5a1cb8c383959cfa

diff --git a/src/Moof/Timer.cc b/src/Moof/Timer.cc
index bc7aae2..a4dcf40 100644
--- a/src/Moof/Timer.cc
+++ b/src/Moof/Timer.cc
@@ -28,7 +28,9 @@
 
 #include <cerrno>
 #include <ctime>
-#include <stdexcept>
+#include <limits>
+
+#include <SDL/SDL.h>
 
 #include "Log.hh"
 #include "Timer.hh"
@@ -37,15 +39,136 @@
 #include "config.h"
 #endif
 
-#include <SDL/SDL.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 == ABSOLUTEE)
+		{
+			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(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
@@ -67,19 +190,17 @@ static time_t setReference_()
 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 sleep(Scalar seconds, bool absolute)
+void Timer::sleep(Scalar seconds, bool absolute)
 {
 	struct timespec ts;
 	int ret;
@@ -103,13 +224,13 @@ void sleep(Scalar seconds, bool absolute)
 // SDL only promises centisecond accuracy, but that's better than a kick in the
 // butt.
 
-Scalar getTicks()
+Scalar Timer::getTicks()
 {
 	Uint32 ms = SDL_GetTicks();
 	return Scalar(ms / 1000) + Scalar(ms % 1000) / 1000.0;
 }
 
-void sleep(Scalar seconds, bool absolute)
+void Timer::sleep(Scalar seconds, bool absolute)
 {
 	if (absolute) seconds -= getTicks();
 	SDL_Delay(Uint32(cml::clamp(int(seconds * 1000.0), 0, 1000)));