mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-18 08:22:04 +00:00
263 lines
9.2 KiB
C++
263 lines
9.2 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "impl/os_timer_event_helper.hpp"
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#include "impl/os_tick_manager.hpp"
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#include "impl/os_timeout_helper.hpp"
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#include "impl/os_multiple_wait_object_list.hpp"
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#include "impl/os_multiple_wait_holder_impl.hpp"
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namespace ams::os {
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namespace {
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ALWAYS_INLINE u64 GetBroadcastCounterUnsafe(TimerEventType *event) {
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const u64 upper = event->broadcast_counter_high;
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return (upper << BITSIZEOF(event->broadcast_counter_low)) | event->broadcast_counter_low;
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}
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ALWAYS_INLINE void IncrementBroadcastCounterUnsafe(TimerEventType *event) {
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if ((++event->broadcast_counter_low) == 0) {
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++event->broadcast_counter_high;
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}
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}
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ALWAYS_INLINE void SignalTimerEventImplUnsafe(TimerEventType *event) {
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/* Set signaled. */
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event->signaled = true;
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/* Signal! */
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if (event->clear_mode == EventClearMode_ManualClear) {
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/* If we're manual clear, increment counter and wake all. */
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IncrementBroadcastCounterUnsafe(event);
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} else {
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/* If we're auto clear, signal one thread, which will clear. */
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GetReference(event->cv_signaled).Signal();
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}
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/* Wake up whatever manager, if any. */
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GetReference(event->multi_wait_object_list_storage).SignalAllThreads();
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}
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}
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void InitializeTimerEvent(TimerEventType *event, EventClearMode clear_mode) {
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/* Initialize internal variables. */
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util::ConstructAt(event->cs_timer_event);
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util::ConstructAt(event->cv_signaled);
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/* Initialize the multi wait object list. */
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util::ConstructAt(event->multi_wait_object_list_storage);
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/* Initialize member variables. */
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event->clear_mode = static_cast<u8>(clear_mode);
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event->signaled = false;
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event->timer_state = TimerEventType::TimerState_Stop;
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event->broadcast_counter_low = 0;
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event->broadcast_counter_high = 0;
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GetReference(event->next_time_to_wakeup) = 0;
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GetReference(event->first) = 0;
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GetReference(event->interval) = 0;
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/* Mark initialized. */
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event->state = TimerEventType::State_Initialized;
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}
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void FinalizeTimerEvent(TimerEventType *event) {
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/* Mark uninitialized. */
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event->state = TimerEventType::State_NotInitialized;
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/* Destroy objects. */
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util::DestroyAt(event->multi_wait_object_list_storage);
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util::DestroyAt(event->cv_signaled);
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util::DestroyAt(event->cs_timer_event);
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}
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void StartOneShotTimerEvent(TimerEventType *event, TimeSpan first_time) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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AMS_ASSERT(first_time >= 0);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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/* Get the current time. */
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TimeSpan cur_time = impl::GetCurrentTick().ToTimeSpan();
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/* Set tracking timespans. */
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GetReference(event->next_time_to_wakeup) = impl::SaturatedAdd(cur_time, first_time);
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GetReference(event->first) = first_time;
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GetReference(event->interval) = 0;
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/* Set state to OneShot. */
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event->timer_state = TimerEventType::TimerState_OneShot;
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/* Signal. */
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GetReference(event->cv_signaled).Broadcast();
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/* Wake up whatever manager, if any. */
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GetReference(event->multi_wait_object_list_storage).SignalAllThreads();
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}
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}
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void StartPeriodicTimerEvent(TimerEventType *event, TimeSpan first_time, TimeSpan interval) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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AMS_ASSERT(first_time >= 0);
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AMS_ASSERT(interval > 0);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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/* Get the current time. */
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TimeSpan cur_time = impl::GetCurrentTick().ToTimeSpan();
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/* Set tracking timespans. */
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GetReference(event->next_time_to_wakeup) = impl::SaturatedAdd(cur_time, first_time);
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GetReference(event->first) = first_time;
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GetReference(event->interval) = interval;
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/* Set state to Periodic. */
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event->timer_state = TimerEventType::TimerState_Periodic;
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/* Signal. */
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GetReference(event->cv_signaled).Broadcast();
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/* Wake up whatever manager, if any. */
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GetReference(event->multi_wait_object_list_storage).SignalAllThreads();
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}
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}
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void StopTimerEvent(TimerEventType *event) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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/* Stop the event. */
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impl::StopTimerUnsafe(event);
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/* Signal. */
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GetReference(event->cv_signaled).Broadcast();
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/* Wake up whatever manager, if any. */
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GetReference(event->multi_wait_object_list_storage).SignalAllThreads();
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}
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}
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void WaitTimerEvent(TimerEventType *event) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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const auto cur_counter = GetBroadcastCounterUnsafe(event);
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while (!event->signaled) {
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if (cur_counter != GetBroadcastCounterUnsafe(event)) {
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break;
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}
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/* Update. */
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auto cur_time = impl::GetCurrentTick().ToTimeSpan();
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if (impl::UpdateSignalStateAndRecalculateNextTimeToWakeupUnsafe(event, cur_time)) {
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SignalTimerEventImplUnsafe(event);
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break;
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}
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/* Check state. */
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if (event->timer_state == TimerEventType::TimerState_Stop) {
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GetReference(event->cv_signaled).Wait(GetPointer(event->cs_timer_event));
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} else {
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TimeSpan next_time = GetReference(event->next_time_to_wakeup);
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impl::TimeoutHelper helper(next_time - cur_time);
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GetReference(event->cv_signaled).TimedWait(GetPointer(event->cs_timer_event), helper);
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}
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}
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if (event->clear_mode == EventClearMode_AutoClear) {
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event->signaled = false;
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}
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}
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}
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bool TryWaitTimerEvent(TimerEventType *event) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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/* Update. */
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auto cur_time = impl::GetCurrentTick().ToTimeSpan();
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if (impl::UpdateSignalStateAndRecalculateNextTimeToWakeupUnsafe(event, cur_time)) {
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SignalTimerEventImplUnsafe(event);
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}
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bool prev = event->signaled;
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if (event->clear_mode == EventClearMode_AutoClear) {
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event->signaled = false;
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}
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return prev;
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}
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}
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void SignalTimerEvent(TimerEventType *event) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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/* If we're signaled, nothing to do. */
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if (event->signaled) {
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return;
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}
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/* Update. */
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auto cur_time = impl::GetCurrentTick().ToTimeSpan();
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impl::UpdateSignalStateAndRecalculateNextTimeToWakeupUnsafe(event, cur_time);
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/* Signal. */
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SignalTimerEventImplUnsafe(event);
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}
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}
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void ClearTimerEvent(TimerEventType *event) {
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AMS_ASSERT(event->state == TimerEventType::State_Initialized);
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{
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std::scoped_lock lk(GetReference(event->cs_timer_event));
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/* Update. */
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auto cur_time = impl::GetCurrentTick().ToTimeSpan();
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if (impl::UpdateSignalStateAndRecalculateNextTimeToWakeupUnsafe(event, cur_time)) {
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SignalTimerEventImplUnsafe(event);
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}
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/* Clear. */
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event->signaled = false;
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}
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}
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void InitializeMultiWaitHolder(MultiWaitHolderType *multi_wait_holder, TimerEventType *event) {
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AMS_ASSERT(event->state == EventType::State_Initialized);
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util::ConstructAt(GetReference(multi_wait_holder->impl_storage).holder_of_timer_event_storage, event);
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multi_wait_holder->user_data = 0;
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}
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}
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