mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-17 17:36:44 +00:00
73 lines
2.7 KiB
C++
73 lines
2.7 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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namespace ams::lm::srv {
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class LogBuffer {
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NON_COPYABLE(LogBuffer);
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NON_MOVEABLE(LogBuffer);
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private:
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struct BufferInfo {
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u8 *m_head;
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size_t m_stored_size;
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size_t m_reference_count;
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};
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public:
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using FlushFunction = bool (*)(const u8 *data, size_t size);
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private:
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BufferInfo m_buffers[2];
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BufferInfo *m_push_buffer;
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BufferInfo *m_flush_buffer;
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size_t m_buffer_size;
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FlushFunction m_flush_function;
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os::SdkMutex m_push_buffer_mutex;
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os::SdkMutex m_flush_buffer_mutex;
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os::SdkConditionVariable m_cv_push_ready;
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os::SdkConditionVariable m_cv_flush_ready;
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bool m_push_canceled;
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size_t m_push_ready_wait_count;
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public:
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constexpr explicit LogBuffer(u8 *buffer, size_t buffer_size, FlushFunction f)
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: m_buffers{}, m_push_buffer(m_buffers + 0), m_flush_buffer(m_buffers + 1),
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m_buffer_size(buffer_size / 2), m_flush_function(f), m_push_buffer_mutex{},
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m_flush_buffer_mutex{}, m_cv_push_ready{}, m_cv_flush_ready{},
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m_push_canceled(false), m_push_ready_wait_count(0)
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{
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AMS_ASSERT(buffer != nullptr);
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AMS_ASSERT(buffer_size > 0);
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AMS_ASSERT(f != nullptr);
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m_buffers[0].m_head = buffer;
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m_buffers[1].m_head = buffer + (buffer_size / 2);
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}
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static LogBuffer &GetDefaultInstance();
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bool Push(const void *data, size_t size) { return this->PushImpl(data, size, true); }
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bool TryPush(const void *data, size_t size) { return this->PushImpl(data, size, false); }
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void CancelPush();
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bool Flush() { return this->FlushImpl(true); }
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bool TryFlush() { return this->FlushImpl(false); }
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private:
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bool PushImpl(const void *data, size_t size, bool blocking);
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bool FlushImpl(bool blocking);
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};
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}
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