ThrottleManager.cc

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#include "ThrottleManager.hh"
 
namespace openmsx {
 
// class ThrottleManager:
 
ThrottleManager::ThrottleManager(CommandController& commandController)
        : throttleSetting(
                commandController, "throttle",
                "controls speed throttling", true, Setting::DONT_SAVE)
        , fullSpeedLoadingSetting(
                commandController, "fullspeedwhenloading",
                "sets openMSX to full speed when the MSX is loading", false)
        , loading(0), throttle(true)
{
        throttleSetting        .attach(*this);
        fullSpeedLoadingSetting.attach(*this);
}
 
ThrottleManager::~ThrottleManager()
{
        throttleSetting        .detach(*this);
        fullSpeedLoadingSetting.detach(*this);
}
 
void ThrottleManager::updateStatus()
{
        bool newThrottle = throttleSetting.getBoolean() &&
                           (!loading || !fullSpeedLoadingSetting.getBoolean());
        if (throttle != newThrottle) {
                throttle = newThrottle;
                notify();
        }
}
 
void ThrottleManager::indicateLoadingState(bool state)
{
        if (state) {
                ++loading;
        } else {
                --loading;
        }
        assert(loading >= 0);
        updateStatus();
}
 
void ThrottleManager::update(const Setting& /*setting*/) noexcept
{
        updateStatus();
}
 
 
// class LoadingIndicator:
 
LoadingIndicator::LoadingIndicator(ThrottleManager& throttleManager_)
        : throttleManager(throttleManager_)
        , isLoading(false)
{
}
 
LoadingIndicator::~LoadingIndicator()
{
        update(false);
}
 
void LoadingIndicator::update(bool newState)
{
        if (isLoading != newState) {
                isLoading = newState;
                throttleManager.indicateLoadingState(isLoading);
        }
}
 
} // namespace openmsx