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