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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cinttypes>
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core_timing.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/timer.h"
namespace Kernel {
/// The event type of the generic timer callback event
static int timer_callback_event_type;
// TODO(yuriks): This can be removed if Timer objects are explicitly pooled in the future, allowing
// us to simply use a pool index or similar.
static Kernel::HandleTable timer_callback_handle_table;
Timer::Timer() {}
Timer::~Timer() {}
SharedPtr<Timer> Timer::Create(ResetType reset_type, std::string name) {
SharedPtr<Timer> timer(new Timer);
timer->reset_type = reset_type;
timer->signaled = false;
timer->name = std::move(name);
timer->initial_delay = 0;
timer->interval_delay = 0;
timer->callback_handle = timer_callback_handle_table.Create(timer).MoveFrom();
if (reset_type == ResetType::Pulse) {
LOG_ERROR(Kernel, "Unimplemented timer reset type Pulse");
UNIMPLEMENTED();
}
return timer;
}
bool Timer::ShouldWait() {
return !signaled;
}
void Timer::Acquire() {
ASSERT_MSG(!ShouldWait(), "object unavailable!");
if (reset_type == ResetType::OneShot)
signaled = false;
}
void Timer::Set(s64 initial, s64 interval) {
// Ensure we get rid of any previous scheduled event
Cancel();
initial_delay = initial;
interval_delay = interval;
u64 initial_microseconds = initial / 1000;
CoreTiming::ScheduleEvent(usToCycles(initial_microseconds), timer_callback_event_type,
callback_handle);
HLE::Reschedule(__func__);
}
void Timer::Cancel() {
CoreTiming::UnscheduleEvent(timer_callback_event_type, callback_handle);
HLE::Reschedule(__func__);
}
void Timer::Clear() {
signaled = false;
}
/// The timer callback event, called when a timer is fired
static void TimerCallback(u64 timer_handle, int cycles_late) {
SharedPtr<Timer> timer =
timer_callback_handle_table.Get<Timer>(static_cast<Handle>(timer_handle));
if (timer == nullptr) {
LOG_CRITICAL(Kernel, "Callback fired for invalid timer %08" PRIx64, timer_handle);
return;
}
LOG_TRACE(Kernel, "Timer %08" PRIx64 " fired", timer_handle);
timer->signaled = true;
// Resume all waiting threads
timer->WakeupAllWaitingThreads();
if (timer->interval_delay != 0) {
// Reschedule the timer with the interval delay
u64 interval_microseconds = timer->interval_delay / 1000;
CoreTiming::ScheduleEvent(usToCycles(interval_microseconds) - cycles_late,
timer_callback_event_type, timer_handle);
}
}
void TimersInit() {
timer_callback_handle_table.Clear();
timer_callback_event_type = CoreTiming::RegisterEvent("TimerCallback", TimerCallback);
}
void TimersShutdown() {}
} // namespace
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