144 lines
4.4 KiB
C++
144 lines
4.4 KiB
C++
// Copyright 2015 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <set>
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#include "common/common.h"
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#include "core/core_timing.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/timer.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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class Timer : public Object {
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public:
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std::string GetTypeName() const override { return "Timer"; }
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std::string GetName() const override { return name; }
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static const HandleType HANDLE_TYPE = HandleType::Timer;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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ResetType reset_type; ///< The ResetType of this timer
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bool signaled; ///< Whether the timer has been signaled or not
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std::set<Handle> waiting_threads; ///< Threads that are waiting for the timer
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std::string name; ///< Name of timer (optional)
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u64 initial_delay; ///< The delay until the timer fires for the first time
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u64 interval_delay; ///< The delay until the timer fires after the first time
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ResultVal<bool> WaitSynchronization() override {
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bool wait = !signaled;
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if (wait) {
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waiting_threads.insert(GetCurrentThread()->GetHandle());
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Kernel::WaitCurrentThread(WAITTYPE_TIMER, this);
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}
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return MakeResult<bool>(wait);
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}
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};
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/**
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* Creates a timer.
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* @param handle Reference to handle for the newly created timer
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* @param reset_type ResetType describing how to create timer
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* @param name Optional name of timer
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* @return Newly created Timer object
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*/
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Timer* CreateTimer(Handle& handle, const ResetType reset_type, const std::string& name) {
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Timer* timer = new Timer;
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handle = Kernel::g_handle_table.Create(timer).ValueOr(INVALID_HANDLE);
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timer->reset_type = reset_type;
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timer->signaled = false;
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timer->name = name;
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timer->initial_delay = 0;
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timer->interval_delay = 0;
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return timer;
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}
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ResultCode CreateTimer(Handle* handle, const ResetType reset_type, const std::string& name) {
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CreateTimer(*handle, reset_type, name);
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return RESULT_SUCCESS;
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}
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ResultCode ClearTimer(Handle handle) {
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Timer* timer = Kernel::g_handle_table.Get<Timer>(handle);
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if (timer == nullptr)
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return InvalidHandle(ErrorModule::Kernel);
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timer->signaled = false;
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return RESULT_SUCCESS;
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}
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/// The event type of the generic timer callback event
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static int TimerCallbackEventType = -1;
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/// The timer callback event, called when a timer is fired
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static void TimerCallback(u64 timer_handle, int cycles_late) {
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Timer* timer = Kernel::g_handle_table.Get<Timer>(timer_handle);
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if (timer == nullptr) {
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LOG_CRITICAL(Kernel, "Callback fired for invalid timer %u", timer_handle);
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return;
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}
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LOG_TRACE(Kernel, "Timer %u fired", timer_handle);
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timer->signaled = true;
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// Resume all waiting threads
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for (Handle thread_handle : timer->waiting_threads) {
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if (Thread* thread = Kernel::g_handle_table.Get<Thread>(thread_handle))
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thread->ResumeFromWait();
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}
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timer->waiting_threads.clear();
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if (timer->reset_type == RESETTYPE_ONESHOT)
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timer->signaled = false;
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if (timer->interval_delay != 0) {
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// Reschedule the timer with the interval delay
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u64 interval_microseconds = timer->interval_delay / 1000;
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CoreTiming::ScheduleEvent(usToCycles(interval_microseconds) - cycles_late,
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TimerCallbackEventType, timer_handle);
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}
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}
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ResultCode SetTimer(Handle handle, s64 initial, s64 interval) {
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Timer* timer = Kernel::g_handle_table.Get<Timer>(handle);
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if (timer == nullptr)
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return InvalidHandle(ErrorModule::Kernel);
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timer->initial_delay = initial;
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timer->interval_delay = interval;
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u64 initial_microseconds = initial / 1000;
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CoreTiming::ScheduleEvent(usToCycles(initial_microseconds), TimerCallbackEventType, handle);
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return RESULT_SUCCESS;
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}
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ResultCode CancelTimer(Handle handle) {
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Timer* timer = Kernel::g_handle_table.Get<Timer>(handle);
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if (timer == nullptr)
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return InvalidHandle(ErrorModule::Kernel);
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CoreTiming::UnscheduleEvent(TimerCallbackEventType, handle);
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return RESULT_SUCCESS;
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}
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void TimersInit() {
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TimerCallbackEventType = CoreTiming::RegisterEvent("TimerCallback", TimerCallback);
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}
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void TimersShutdown() {
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}
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} // namespace
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