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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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104 lines
3.1 KiB
C++
104 lines
3.1 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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#pragma once
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#include <stratosphere.hpp>
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#include "htc_rpc_tasks.hpp"
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#include "htc_htcmisc_rpc_tasks.hpp"
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namespace ams::htc::server::rpc {
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class RpcTaskQueue {
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private:
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u32 m_task_ids[MaxRpcCount];
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PacketCategory m_task_categories[MaxRpcCount];
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int m_offset;
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int m_count;
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os::SdkConditionVariable m_cv;
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os::SdkMutex m_mutex;
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bool m_cancelled;
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public:
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constexpr RpcTaskQueue() = default;
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void Initialize() {
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m_offset = 0;
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m_count = 0;
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m_cancelled = false;
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}
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void Finalize() {
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m_offset = 0;
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m_count = 0;
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}
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void Cancel() {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Cancel ourselves. */
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m_cancelled = true;
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/* Signal to consumers/producers. */
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m_cv.Signal();
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}
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void Add(u32 task_id, PacketCategory category) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Check pre-conditions. */
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AMS_ASSERT(m_count < static_cast<int>(MaxRpcCount));
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/* Determine index. */
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const auto index = ((m_count++) + m_offset) % MaxRpcCount;
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/* Set task. */
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m_task_ids[index] = task_id;
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m_task_categories[index] = category;
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/* Signal. */
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if (m_count > 0) {
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m_cv.Signal();
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}
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}
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Result Take(u32 *out_id, PacketCategory *out_category) {
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/* Lock ourselves. */
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std::scoped_lock lk(m_mutex);
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/* Wait until we can take. */
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while (m_count == 0 && !m_cancelled) {
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m_cv.Wait(m_mutex);
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}
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/* Check that we're not cancelled. */
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R_UNLESS(!m_cancelled, htc::ResultCancelled());
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/* Determine index. */
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const auto index = m_offset;
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/* Advance the queue. */
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m_offset = (m_offset + 1) % MaxRpcCount;
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--m_count;
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/* Return the task info. */
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*out_id = m_task_ids[index];
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*out_category = m_task_categories[index];
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R_SUCCEED();
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}
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};
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}
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