mirror of
https://github.com/Atmosphere-NX/Atmosphere
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90 lines
3 KiB
C++
90 lines
3 KiB
C++
/*
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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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#pragma once
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#include "os_mutex.hpp"
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#include "os_condvar.hpp"
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namespace ams::os {
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namespace impl {
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class WaitableObjectList;
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template<MessageQueueWaitKind WaitKind>
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class WaitableHolderOfMessageQueue;
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}
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class MessageQueue {
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template<MessageQueueWaitKind WaitKind>
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friend class impl::WaitableHolderOfMessageQueue;
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NON_COPYABLE(MessageQueue);
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NON_MOVEABLE(MessageQueue);
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private:
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util::TypedStorage<impl::WaitableObjectList, sizeof(util::IntrusiveListNode), alignof(util::IntrusiveListNode)> waitlist_not_empty;
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util::TypedStorage<impl::WaitableObjectList, sizeof(util::IntrusiveListNode), alignof(util::IntrusiveListNode)> waitlist_not_full;
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Mutex queue_lock;
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ConditionVariable cv_not_full;
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ConditionVariable cv_not_empty;
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std::unique_ptr<uintptr_t[]> buffer;
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size_t capacity;
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size_t count;
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size_t offset;
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private:
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constexpr inline bool IsFull() const {
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return this->count >= this->capacity;
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}
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constexpr inline bool IsEmpty() const {
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return this->count == 0;
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}
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void SendInternal(uintptr_t data);
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void SendNextInternal(uintptr_t data);
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uintptr_t ReceiveInternal();
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uintptr_t PeekInternal();
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public:
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MessageQueue(std::unique_ptr<uintptr_t[]> buf, size_t c);
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~MessageQueue();
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/* For convenience. */
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MessageQueue(size_t c) : MessageQueue(std::make_unique<uintptr_t[]>(c), c) { /* ... */ }
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/* Sending (FIFO functionality) */
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void Send(uintptr_t data);
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bool TrySend(uintptr_t data);
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bool TimedSend(uintptr_t data, u64 timeout);
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/* Sending (LIFO functionality) */
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void SendNext(uintptr_t data);
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bool TrySendNext(uintptr_t data);
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bool TimedSendNext(uintptr_t data, u64 timeout);
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/* Receive functionality */
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void Receive(uintptr_t *out);
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bool TryReceive(uintptr_t *out);
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bool TimedReceive(uintptr_t *out, u64 timeout);
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/* Peek functionality */
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void Peek(uintptr_t *out);
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bool TryPeek(uintptr_t *out);
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bool TimedPeek(uintptr_t *out, u64 timeout);
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};
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}
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