mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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321 lines
11 KiB
C++
321 lines
11 KiB
C++
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/*
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* Copyright (c) 2018-2020 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_timeout_helper.hpp"
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#include "impl/os_message_queue_helper.hpp"
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namespace ams::os {
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namespace {
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using MessageQueueHelper = impl::MessageQueueHelper<LightMessageQueueType>;
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template<bool ClearEvent, auto EnqueueFunction>
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bool TryEnqueueLightMessageQueueImpl(LightMessageQueueType *mq, uintptr_t data) {
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/* Perform the enqueue. */
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{
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/* Acquire exclusive access to the queue. */
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std::scoped_lock lk(util::GetReference(mq->mutex_queue));
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/* Check that we can enqueue. */
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if (MessageQueueHelper::IsMessageQueueFull(mq)) {
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/* If we should, clear the event. */
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if constexpr (ClearEvent) {
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util::GetReference(mq->ev_not_full).Clear();
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}
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/* We can't enqueue because we're full. */
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return false;
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}
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/* Enqueue the data. */
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EnqueueFunction(mq, data);
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}
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/* Signal that we're not empty. */
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util::GetReference(mq->ev_not_empty).SignalWithManualClear();
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return true;
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}
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template<bool ClearEvent>
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bool TrySendLightMessageQueueImpl(LightMessageQueueType *mq, uintptr_t data) {
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return TryEnqueueLightMessageQueueImpl<ClearEvent, MessageQueueHelper::EnqueueUnsafe>(mq, data);
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}
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template<bool ClearEvent>
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bool TryJamLightMessageQueueImpl(LightMessageQueueType *mq, uintptr_t data) {
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return TryEnqueueLightMessageQueueImpl<ClearEvent, MessageQueueHelper::JamUnsafe>(mq, data);
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}
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template<bool ClearEvent>
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bool TryReceiveLightMessageQueueImpl(uintptr_t *out, LightMessageQueueType *mq) {
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/* Perform the receive. */
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{
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/* Acquire exclusive access to the queue. */
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std::scoped_lock lk(util::GetReference(mq->mutex_queue));
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/* Check that we can receive. */
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if (MessageQueueHelper::IsMessageQueueEmpty(mq)) {
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/* If we should, clear the event. */
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if constexpr (ClearEvent) {
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util::GetReference(mq->ev_not_empty).Clear();
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}
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/* We can't enqueue because we're full. */
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return false;
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}
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/* Receive the data. */
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*out = MessageQueueHelper::DequeueUnsafe(mq);
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}
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/* Signal that we're not full. */
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util::GetReference(mq->ev_not_full).SignalWithManualClear();
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return true;
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}
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template<bool ClearEvent>
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bool TryPeekLightMessageQueueImpl(uintptr_t *out, const LightMessageQueueType *mq) {
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/* Perform the peek. */
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{
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/* Acquire exclusive access to the queue. */
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std::scoped_lock lk(util::GetReference(mq->mutex_queue));
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/* Check that we can peek. */
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if (MessageQueueHelper::IsMessageQueueEmpty(mq)) {
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/* If we should, clear the event. */
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if constexpr (ClearEvent) {
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util::GetReference(mq->ev_not_empty).Clear();
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}
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/* We can't enqueue because we're full. */
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return false;
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}
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/* Peek the data. */
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*out = MessageQueueHelper::PeekUnsafe(mq);
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}
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return true;
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}
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}
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void InitializeLightMessageQueue(LightMessageQueueType *mq, uintptr_t *buffer, size_t count) {
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/* Check pre-conditions. */
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AMS_ASSERT(buffer != nullptr);
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AMS_ASSERT(count >= 1);
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/* Construct objects. */
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util::ConstructAt(mq->mutex_queue);
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util::ConstructAt(mq->ev_not_empty, false);
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util::ConstructAt(mq->ev_not_full, true);
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/* Set member variables. */
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mq->buffer = buffer;
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mq->capacity = static_cast<s32>(count);
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mq->count = 0;
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mq->offset = 0;
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/* Mark initialized. */
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mq->state = LightMessageQueueType::State_Initialized;
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}
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void FinalizeLightMessageQueue(LightMessageQueueType *mq) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Mark uninitialized. */
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mq->state = LightMessageQueueType::State_NotInitialized;
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/* Destroy objects. */
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util::DestroyAt(mq->ev_not_empty);
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util::DestroyAt(mq->ev_not_full);
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util::DestroyAt(mq->mutex_queue);
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}
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/* Sending (FIFO functionality) */
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void SendLightMessageQueue(LightMessageQueueType *mq, uintptr_t data) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Repeatedly try to send. */
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while (!TrySendLightMessageQueueImpl<true>(mq, data)) {
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/* Wait until we can try to send again. */
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util::GetReference(mq->ev_not_full).WaitWithManualClear();
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}
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}
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bool TrySendLightMessageQueue(LightMessageQueueType *mq, uintptr_t data) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Try to send. */
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return TrySendLightMessageQueueImpl<false>(mq, data);
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}
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bool TimedSendLightMessageQueue(LightMessageQueueType *mq, uintptr_t data, TimeSpan timeout) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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AMS_ASSERT(timeout.GetNanoSeconds() >= 0);
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/* Create timeout helper. */
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impl::TimeoutHelper timeout_helper(timeout);
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/* Repeatedly try to send. */
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while (!TrySendLightMessageQueueImpl<true>(mq, data)) {
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/* Check if we're timed out. */
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if (timeout_helper.TimedOut()) {
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return false;
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}
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/* Wait until we can try to send again. */
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util::GetReference(mq->ev_not_full).TimedWaitWithManualClear(timeout_helper);
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}
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return true;
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}
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/* Jamming (LIFO functionality) */
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void JamLightMessageQueue(LightMessageQueueType *mq, uintptr_t data) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Repeatedly try to jam. */
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while (!TryJamLightMessageQueueImpl<true>(mq, data)) {
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/* Wait until we can try to jam again. */
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util::GetReference(mq->ev_not_full).WaitWithManualClear();
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}
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}
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bool TryJamLightMessageQueue(LightMessageQueueType *mq, uintptr_t data) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Try to jam. */
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return TryJamLightMessageQueueImpl<false>(mq, data);
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}
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bool TimedJamLightMessageQueue(LightMessageQueueType *mq, uintptr_t data, TimeSpan timeout) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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AMS_ASSERT(timeout.GetNanoSeconds() >= 0);
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/* Create timeout helper. */
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impl::TimeoutHelper timeout_helper(timeout);
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/* Repeatedly try to jam. */
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while (!TryJamLightMessageQueueImpl<true>(mq, data)) {
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/* Check if we're timed out. */
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if (timeout_helper.TimedOut()) {
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return false;
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}
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/* Wait until we can try to jam again. */
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util::GetReference(mq->ev_not_full).TimedWaitWithManualClear(timeout_helper);
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}
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return true;
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}
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/* Receive functionality */
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void ReceiveLightMessageQueue(uintptr_t *out, LightMessageQueueType *mq) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Repeatedly try to receive. */
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while (!TryReceiveLightMessageQueueImpl<true>(out, mq)) {
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/* Wait until we can try to receive again. */
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util::GetReference(mq->ev_not_empty).WaitWithManualClear();
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}
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}
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bool TryReceiveLightMessageQueue(uintptr_t *out, LightMessageQueueType *mq) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Try to receive. */
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return TryReceiveLightMessageQueueImpl<false>(out, mq);
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}
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bool TimedReceiveLightMessageQueue(uintptr_t *out, LightMessageQueueType *mq, TimeSpan timeout) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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AMS_ASSERT(timeout.GetNanoSeconds() >= 0);
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/* Create timeout helper. */
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impl::TimeoutHelper timeout_helper(timeout);
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/* Repeatedly try to receive. */
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while (!TryReceiveLightMessageQueueImpl<true>(out, mq)) {
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/* Check if we're timed out. */
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if (timeout_helper.TimedOut()) {
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return false;
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}
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/* Wait until we can try to receive again. */
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util::GetReference(mq->ev_not_empty).TimedWaitWithManualClear(timeout_helper);
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}
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return true;
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}
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/* Peek functionality */
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void PeekLightMessageQueue(uintptr_t *out, const LightMessageQueueType *mq) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Repeatedly try to peek. */
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while (!TryPeekLightMessageQueueImpl<true>(out, mq)) {
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/* Wait until we can try to peek again. */
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util::GetReference(mq->ev_not_empty).WaitWithManualClear();
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}
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}
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bool TryPeekLightMessageQueue(uintptr_t *out, const LightMessageQueueType *mq) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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/* Try to peek. */
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return TryPeekLightMessageQueueImpl<false>(out, mq);
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}
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bool TimedPeekLightMessageQueue(uintptr_t *out, const LightMessageQueueType *mq, TimeSpan timeout) {
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/* Check pre-conditions. */
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AMS_ASSERT(mq->state == LightMessageQueueType::State_Initialized);
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AMS_ASSERT(timeout.GetNanoSeconds() >= 0);
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/* Create timeout helper. */
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impl::TimeoutHelper timeout_helper(timeout);
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/* Repeatedly try to peek. */
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while (!TryPeekLightMessageQueueImpl<true>(out, mq)) {
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/* Check if we're timed out. */
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if (timeout_helper.TimedOut()) {
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return false;
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}
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/* Wait until we can try to peek again. */
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util::GetReference(mq->ev_not_empty).TimedWaitWithManualClear(timeout_helper);
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}
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return true;
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}
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}
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