mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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113 lines
3.8 KiB
C++
113 lines
3.8 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 <vapours.hpp>
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#include <stratosphere/fs/impl/fs_newable.hpp>
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namespace ams::fssystem {
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constexpr inline size_t BufferPoolAlignment = 4_KB;
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constexpr inline size_t BufferPoolWorkSize = 320;
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class PooledBuffer {
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NON_COPYABLE(PooledBuffer);
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private:
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char *buffer;
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size_t size;
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private:
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static size_t GetAllocatableSizeMaxCore(bool large);
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public:
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static size_t GetAllocatableSizeMax() { return GetAllocatableSizeMaxCore(false); }
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static size_t GetAllocatableParticularlyLargeSizeMax() { return GetAllocatableSizeMaxCore(true); }
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private:
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void Swap(PooledBuffer &rhs) {
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std::swap(this->buffer, rhs.buffer);
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std::swap(this->size, rhs.size);
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}
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public:
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/* Constructor/Destructor. */
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constexpr PooledBuffer() : buffer(), size() { /* ... */ }
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PooledBuffer(size_t ideal_size, size_t required_size) : buffer(), size() {
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this->Allocate(ideal_size, required_size);
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}
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~PooledBuffer() {
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this->Deallocate();
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}
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/* Move and assignment. */
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explicit PooledBuffer(PooledBuffer &&rhs) : buffer(rhs.buffer), size(rhs.size) {
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rhs.buffer = nullptr;
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rhs.size = 0;
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}
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PooledBuffer &operator=(PooledBuffer &&rhs) {
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PooledBuffer(std::move(rhs)).Swap(*this);
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return *this;
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}
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/* Allocation API. */
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void Allocate(size_t ideal_size, size_t required_size) {
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return this->AllocateCore(ideal_size, required_size, false);
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}
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void AllocateParticularlyLarge(size_t ideal_size, size_t required_size) {
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return this->AllocateCore(ideal_size, required_size, true);
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}
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void Shrink(size_t ideal_size);
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void Deallocate() {
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/* Shrink the buffer to empty. */
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this->Shrink(0);
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AMS_ASSERT(this->buffer == nullptr);
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}
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char *GetBuffer() const {
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AMS_ASSERT(this->buffer != nullptr);
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return this->buffer;
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}
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size_t GetSize() const {
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AMS_ASSERT(this->buffer != nullptr);
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return this->size;
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}
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private:
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void AllocateCore(size_t ideal_size, size_t required_size, bool large);
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};
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Result InitializeBufferPool(char *buffer, size_t size);
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Result InitializeBufferPool(char *buffer, size_t size, char *work, size_t work_size);
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bool IsPooledBuffer(const void *buffer);
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size_t GetPooledBufferRetriedCount();
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size_t GetPooledBufferReduceAllocationCount();
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size_t GetPooledBufferFreeSizePeak();
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void ClearPooledBufferPeak();
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void RegisterAdditionalDeviceAddress(uintptr_t address, size_t size);
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void UnregisterAdditionalDeviceAddress(uintptr_t address);
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bool IsAdditionalDeviceAddress(const void *ptr);
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inline bool IsDeviceAddress(const void *buffer) {
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return IsPooledBuffer(buffer) || IsAdditionalDeviceAddress(buffer);
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}
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}
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