117 lines
3.2 KiB
C++
117 lines
3.2 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 <cinttypes>
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#include <unordered_map>
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#include "common/archives.h"
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/hle/kernel/handle_table.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/kernel/timer.h"
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SERIALIZE_EXPORT_IMPL(Kernel::Timer)
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namespace Kernel {
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Timer::Timer(KernelSystem& kernel)
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: WaitObject(kernel), kernel(kernel), timer_manager(kernel.GetTimerManager()) {}
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Timer::~Timer() {
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Cancel();
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timer_manager.timer_callback_table.erase(callback_id);
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}
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std::shared_ptr<Timer> KernelSystem::CreateTimer(ResetType reset_type, std::string name) {
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auto timer{std::make_shared<Timer>(*this)};
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timer->reset_type = reset_type;
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timer->signaled = false;
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timer->name = std::move(name);
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timer->initial_delay = 0;
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timer->interval_delay = 0;
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timer->callback_id = ++timer_manager->next_timer_callback_id;
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timer_manager->timer_callback_table[timer->callback_id] = timer.get();
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return timer;
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}
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bool Timer::ShouldWait(const Thread* thread) const {
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return !signaled;
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}
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void Timer::Acquire(Thread* thread) {
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ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
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if (reset_type == ResetType::OneShot)
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signaled = false;
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}
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void Timer::Set(s64 initial, s64 interval) {
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// Ensure we get rid of any previous scheduled event
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Cancel();
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initial_delay = initial;
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interval_delay = interval;
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if (initial == 0) {
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// Immediately invoke the callback
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Signal(0);
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} else {
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kernel.timing.ScheduleEvent(nsToCycles(initial), timer_manager.timer_callback_event_type,
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callback_id);
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}
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}
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void Timer::Cancel() {
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kernel.timing.UnscheduleEvent(timer_manager.timer_callback_event_type, callback_id);
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}
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void Timer::Clear() {
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signaled = false;
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}
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void Timer::WakeupAllWaitingThreads() {
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WaitObject::WakeupAllWaitingThreads();
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if (reset_type == ResetType::Pulse)
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signaled = false;
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}
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void Timer::Signal(s64 cycles_late) {
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LOG_TRACE(Kernel, "Timer {} fired", GetObjectId());
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signaled = true;
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// Resume all waiting threads
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WakeupAllWaitingThreads();
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if (interval_delay != 0) {
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// Reschedule the timer with the interval delay
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kernel.timing.ScheduleEvent(nsToCycles(interval_delay) - cycles_late,
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timer_manager.timer_callback_event_type, callback_id);
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}
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}
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/// The timer callback event, called when a timer is fired
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void TimerManager::TimerCallback(u64 callback_id, s64 cycles_late) {
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std::shared_ptr<Timer> timer = SharedFrom(timer_callback_table.at(callback_id));
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if (timer == nullptr) {
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LOG_CRITICAL(Kernel, "Callback fired for invalid timer {:016x}", callback_id);
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return;
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}
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timer->Signal(cycles_late);
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}
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TimerManager::TimerManager(Core::Timing& timing) : timing(timing) {
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timer_callback_event_type =
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timing.RegisterEvent("TimerCallback", [this](u64 thread_id, s64 cycle_late) {
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TimerCallback(thread_id, cycle_late);
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});
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}
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} // namespace Kernel
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