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Imputes ClockingHint::Observer logic into JustInTimeActor.

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This commit is contained in:
Thomas Harte 2021-03-26 23:44:15 -04:00
parent 53ba0e67d1
commit 7937cc2d0f
1 changed files with 30 additions and 3 deletions
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33
ClockReceiver/JustInTime.hpp
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@ -10,6 +10,7 @@
#define JustInTime_h
#include "../Concurrency/AsyncTaskQueue.hpp"
#include "ClockingHintSource.hpp"
#include "ForceInline.hpp"
/*!
@ -24,8 +25,13 @@
If the held object implements get_next_sequence_point() then it'll be used to flush implicitly
as and when sequence points are hit. Callers can use will_flush() to predict these.
If the held object is a subclass of ClockingHint::Source, this template will register as an
observer and potentially stop clocking or stop delaying clocking until just-in-time references
as directed.
*/
template <class T, int multiplier = 1, int divider = 1, class LocalTimeScale = HalfCycles, class TargetTimeScale = LocalTimeScale> class JustInTimeActor {
template <class T, int multiplier = 1, int divider = 1, class LocalTimeScale = HalfCycles, class TargetTimeScale = LocalTimeScale> class JustInTimeActor:
public ClockingHint::Observer {
private:
class SequencePointAwareDeleter {
public:
@ -43,10 +49,20 @@ template <class T, int multiplier = 1, int divider = 1, class LocalTimeScale = H
public:
/// Constructs a new JustInTimeActor using the same construction arguments as the included object.
template<typename... Args> JustInTimeActor(Args&&... args) : object_(std::forward<Args>(args)...) {}
template<typename... Args> JustInTimeActor(Args&&... args) : object_(std::forward<Args>(args)...) {
if constexpr (std::is_base_of<ClockingHint::Source, T>::value) {
object_.set_clocking_hint_observer(this);
}
}
/// Adds time to the actor.
forceinline void operator += (LocalTimeScale rhs) {
if constexpr (std::is_base_of<ClockingHint::Source, T>::value) {
if(clocking_preference_ == ClockingHint::Preference::None) {
return;
}
}
if constexpr (multiplier != 1) {
time_since_update_ += rhs * multiplier;
} else {
@ -54,11 +70,17 @@ template <class T, int multiplier = 1, int divider = 1, class LocalTimeScale = H
}
is_flushed_ = false;
if constexpr (std::is_base_of<ClockingHint::Source, T>::value) {
if (clocking_preference_ == ClockingHint::Preference::RealTime) {
flush();
return;
}
}
if constexpr (has_sequence_points<T>::value) {
time_until_event_ -= rhs;
if(time_until_event_ <= LocalTimeScale(0)) {
flush();
update_sequence_point();
}
}
}
@ -149,6 +171,11 @@ template <class T, int multiplier = 1, int divider = 1, class LocalTimeScale = H
template <typename S, typename = void> struct has_sequence_points : std::false_type {};
template <typename S> struct has_sequence_points<S, decltype(void(std::declval<S &>().get_next_sequence_point()))> : std::true_type {};
ClockingHint::Preference clocking_preference_ = ClockingHint::Preference::JustInTime;
void set_component_prefers_clocking(ClockingHint::Source *, ClockingHint::Preference clocking) {
clocking_preference_ = clocking;
}
};
/*!