96 lines
2.8 KiB
C++
96 lines
2.8 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 "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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/// The event type of the generic timer callback event
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static int timer_callback_event_type = -1;
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// TODO(yuriks): This can be removed if Timer objects are explicitly pooled in the future, allowing
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// us to simply use a pool index or similar.
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static Kernel::HandleTable timer_callback_handle_table;
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ResultVal<SharedPtr<Timer>> Timer::Create(ResetType reset_type, std::string name) {
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SharedPtr<Timer> timer(new Timer);
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// TOOD(yuriks): Don't create Handle (see Thread::Create())
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CASCADE_RESULT(auto unused, Kernel::g_handle_table.Create(timer));
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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_handle = timer_callback_handle_table.Create(timer).MoveFrom();
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return MakeResult<SharedPtr<Timer>>(timer);
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}
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bool Timer::ShouldWait() {
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return !signaled;
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}
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void Timer::Acquire() {
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_assert_msg_(Kernel, !ShouldWait(), "object unavailable!");
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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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u64 initial_microseconds = initial / 1000;
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CoreTiming::ScheduleEvent(usToCycles(initial_microseconds),
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timer_callback_event_type, callback_handle);
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}
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void Timer::Cancel() {
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CoreTiming::UnscheduleEvent(timer_callback_event_type, callback_handle);
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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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/// 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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SharedPtr<Timer> timer = timer_callback_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 %08X", 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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timer->WakeupAllWaitingThreads();
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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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timer_callback_event_type, timer_handle);
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}
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}
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void TimersInit() {
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timer_callback_event_type = 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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