new timer class

[chaz/yoink] / src / Moof / Timer.cc

diff --git a/src/Moof/Timer.cc b/src/Moof/Timer.cc
index bc7aae220416687747de6f29bf07c39fc39a3f67..d28d5e89fd9d8ef39b379459a0b3a51b6009de3f 100644 (file)
--- a/src/Moof/Timer.cc
+++ b/src/Moof/Timer.cc
@@ -28,6 +28,7 @@
 
 #include <cerrno>
 #include <ctime>
+#include <limits>
 #include <stdexcept>
 
 #include "Log.hh"
@@ -43,6 +44,129 @@
 namespace Mf {
 
 
+Scalar Timer::nextFire_ = std::numeric_limits<Scalar>::max();
+std::map<unsigned,Timer&> Timer::timers_;
+
+
+unsigned Timer::getNewID()
+{
+       static unsigned id = 1;
+       return id++;
+}
+
+
+void Timer::init(const Function& function, Scalar seconds, Mode mode)
+{
+       invalidate();
+
+       mode_ = mode;
+
+       if (mode_ != INVALID)
+       {
+               function_ = function;
+
+               if (mode == ABSOLUTEE)
+               {
+                       absolute_ = seconds;
+               }
+               else
+               {
+                       absolute_ = seconds - getTicks();
+                       interval_ = seconds;
+               }
+
+               id_ = getNewID();
+               timers_.insert(std::pair<unsigned,Timer&>(id_, *this));
+
+               if (absolute_ < nextFire_) nextFire_ = absolute_;
+       }
+}
+
+
+bool Timer::isValid() const
+{
+       return mode_ != INVALID;
+}
+
+void Timer::invalidate()
+{
+       if (mode_ != INVALID)
+       {
+               timers_.erase(id_);
+               mode_ = INVALID;
+
+               if (isEqual(absolute_, nextFire_)) nextFire_ = findNextFire();
+       }
+}
+
+
+void Timer::fire()
+{
+       Scalar t = getTicks();
+
+       if (function_) function_(*this, t);
+
+       if (isRepeating())
+       {
+               Scalar absolute = absolute_;
+
+               if (isEqual(absolute_, t, 1.0)) absolute_ += interval_;
+               else absolute_ = interval_ + t;
+
+               if (isEqual(absolute, nextFire_)) nextFire_ = findNextFire();
+       }
+       else
+       {
+               invalidate();
+       }
+}
+
+
+Scalar Timer::findNextFire()
+{
+       std::map<unsigned,Timer&>::iterator it;
+       Scalar nextFire = std::numeric_limits<Scalar>::max();
+
+       for (it = timers_.begin(); it != timers_.end(); ++it)
+       {
+               Scalar absolute = (*it).second.absolute_;
+               if (absolute < nextFire) nextFire = absolute;
+       }
+
+       return nextFire;
+}
+
+
+Scalar Timer::getSecondsRemaining() const
+{
+       return absolute_ - getTicks();
+}
+
+bool Timer::isExpired() const
+{
+       return getSecondsRemaining() < 0.0;
+}
+
+bool Timer::isRepeating() const
+{
+       return mode_ == REPEAT;
+}
+
+
+void Timer::fireIfExpired(Scalar t)
+{
+       std::map<unsigned,Timer&>::iterator it;
+
+       if (nextFire_ > t) return;
+
+       for (it = timers_.begin(); it != timers_.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
@@ -67,7 +191,7 @@ static time_t setReference_()
 static const time_t reference = setReference_();
 
 
-Scalar getTicks()
+Scalar Timer::getTicks()
 {
        struct timespec ts;
 
@@ -79,7 +203,7 @@ Scalar getTicks()
        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 +227,13 @@ 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)));