initial runloop implementation

[chaz/yoink] / src / moof / timer.cc

diff --git a/src/moof/timer.cc b/src/moof/timer.cc
index 273625640ab4a78dedfda47a691981972a98d7cf..9b105b4c991fcb73582ff0ad86ca73091ef5c85d 100644 (file)
--- a/src/moof/timer.cc
+++ b/src/moof/timer.cc
@@ -9,41 +9,30 @@
 *
 **************************************************************************/
 
+#include "config.h"
+
 #include <cerrno>
 #include <ctime>
 #include <limits>
 
 #include <SDL/SDL.h>
 
-#include "log.hh"
+#include "debug.hh"
 #include "timer.hh"
 
-#if HAVE_CONFIG_H
-#include "config.h"
-#endif
-
 
 namespace moof {
 
 
-scalar timer::gNextFire = std::numeric_limits<scalar>::max();
-std::map<unsigned,timer*> timer::gTimers;
-
-
-unsigned timer::new_identifier()
-{
-       static unsigned id = 1;
-       return id++;
-}
-
-
-void timer::init(const function& function, scalar seconds, mode mode)
+void timer::init(const function& function,
+                                scalar seconds,
+                                mode mode,
+                                runloop* runloop)
 {
        invalidate();
+       ASSERT(runloop && "can't schedule timer without a runloop");
 
-       mode_ = mode;
-
-       if (mode_ != invalid)
+       if ((mode_ = mode) != invalid)
        {
                function_ = function;
 
@@ -57,104 +46,39 @@ void timer::init(const function& function, scalar seconds, mode mode)
                        interval_ = seconds;
                }
 
-               id_ = new_identifier();
-               gTimers.insert(std::pair<unsigned,timer*>(id_, this));
-
-               if (absolute_ < gNextFire) gNextFire = absolute_;
+               runloop->add_timer(this);
+               runloop_ = runloop;
        }
 }
 
 
-bool timer::is_valid() const
-{
-       return mode_ != invalid;
-}
-
 void timer::invalidate()
 {
        if (mode_ != invalid)
        {
-               gTimers.erase(id_);
                mode_ = invalid;
+               absolute_ = SCALAR(0.0);
 
-               if (is_equal(absolute_, gNextFire)) gNextFire = find_next_expiration();
+               runloop_->remove_timer(this);
+               runloop_ = 0;
        }
 }
 
 
-void timer::fire()
+void timer::fire(scalar t)
 {
-       scalar t = ticks();
-
        if (function_) function_(*this, t);
 
        if (is_repeating())
        {
-               scalar absolute = absolute_;
-
                if (is_equal(absolute_, t, 1.0)) absolute_ += interval_;
                else absolute_ = interval_ + t;
-
-               if (is_equal(absolute, gNextFire)) gNextFire = find_next_expiration();
-       }
-       else
-       {
-               invalidate();
-       }
-}
-
-
-scalar timer::find_next_expiration()
-{
-       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->absolute_;
-               if (absolute < nextFire) nextFire = absolute;
-       }
-
-       return nextFire;
-}
-
-
-scalar timer::seconds_remaining() const
-{
-       return absolute_ - ticks();
-}
-
-bool timer::is_expired() const
-{
-       return seconds_remaining() < 0.0;
-}
-
-bool timer::is_repeating() const
-{
-       return mode_ == repeat;
-}
-
-
-void timer::fire_expired_timers()
-{
-       fire_expired_timers(ticks());
-}
-
-void timer::fire_expired_timers(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->is_expired()) timer->fire();
        }
+       else invalidate();
 }
 
 
-#if HAVE_CLOCK_GETTIME
+#if ENABLE_CLOCK_GETTIME
 
 // Since the monotonic clock will provide us with the time since the
 // computer started, the number of seconds since that time could easily
@@ -175,7 +99,7 @@ static time_t set_reference()
        return ts.tv_sec;
 }
 
-static const time_t reference = set_reference();
+static const time_t reference_ = set_reference();
 
 
 scalar timer::ticks()
@@ -185,47 +109,44 @@ scalar timer::ticks()
        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;
+       return scalar(ts.tv_sec - reference_) +
+                  scalar(ts.tv_nsec) * SCALAR(0.000000001);
 }
 
 void timer::sleep(scalar seconds, mode mode)
 {
-       struct timespec ts;
-       int ret;
-
        if (mode == absolute) seconds -= ticks();
-       ts.tv_sec = time_t(seconds);
-       ts.tv_nsec = long((seconds - scalar(ts.tv_sec)) * 1000000000.0);
+       if (seconds < SCALAR(0.0)) return;
 
-       do
-       {
-               ret = nanosleep(&ts, &ts);
-       }
-       while (ret == -1 && errno == EINTR);
+       struct timespec ts;
+       ts.tv_sec = seconds;
+       ts.tv_nsec = (seconds - scalar(ts.tv_sec)) * SCALAR(1000000000.0);
+
+       int ret;
+       do ret = nanosleep(&ts, &ts); while (ret == -1 && errno == EINTR);
 }
 
 
-#else // ! HAVE_CLOCK_GETTIME
+#else // ! ENABLE_CLOCK_GETTIME
 
 
 // If we don't have posix timers, we'll have to use a different timing
 // method.  SDL only promises centisecond accuracy, but that's better than
-// a kick in the pants.
+// a kick in the pants.  It could end up being just as good anyway.
 
 scalar timer::ticks()
 {
-       Uint32 ms = SDL_GetTicks();
-       return scalar(ms / 1000) + scalar(ms % 1000) / 1000.0;
+       return scalar(SDL_GetTicks()) * SCALAR(0.001);
 }
 
 void timer::sleep(scalar seconds, mode mode)
 {
        if (mode == absolute) seconds -= ticks();
-       SDL_Delay(Uint32(clamp(int(seconds * 1000.0), 0, 1000)));
+       if (seconds < SCALAR(0.0)) return;
+       SDL_Delay(seconds * SCALAR(1000.0));
 }
 
-#endif // HAVE_CLOCK_GETTIME
+#endif // ENABLE_CLOCK_GETTIME
 
 
 } // namespace moof