91 lines
2.3 KiB
C++
91 lines
2.3 KiB
C++
/*
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* Copyright (C) 2018-2021 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#pragma once
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#include "shared/source/helpers/debug_helpers.h"
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#include "shared/source/helpers/ptr_math.h"
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#include <atomic>
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#include <cstddef>
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#include <cstdint>
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namespace NEO {
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class GraphicsAllocation;
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class LinearStream {
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public:
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virtual ~LinearStream() = default;
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LinearStream();
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LinearStream(void *buffer, size_t bufferSize);
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LinearStream(GraphicsAllocation *buffer);
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LinearStream(GraphicsAllocation *gfxAllocation, void *buffer, size_t bufferSize);
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void *getCpuBase() const;
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void *getSpace(size_t size);
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size_t getMaxAvailableSpace() const;
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size_t getAvailableSpace() const;
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size_t getUsed() const;
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void overrideMaxSize(size_t newMaxSize);
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void replaceBuffer(void *buffer, size_t bufferSize);
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GraphicsAllocation *getGraphicsAllocation() const;
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void replaceGraphicsAllocation(GraphicsAllocation *gfxAllocation);
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template <typename Cmd>
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Cmd *getSpaceForCmd() {
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auto ptr = getSpace(sizeof(Cmd));
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return reinterpret_cast<Cmd *>(ptr);
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}
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protected:
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std::atomic<size_t> sizeUsed;
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size_t maxAvailableSpace;
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void *buffer;
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GraphicsAllocation *graphicsAllocation;
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};
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inline void *LinearStream::getCpuBase() const {
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return buffer;
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}
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inline void *LinearStream::getSpace(size_t size) {
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UNRECOVERABLE_IF(sizeUsed + size > maxAvailableSpace);
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auto memory = ptrOffset(buffer, sizeUsed);
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sizeUsed += size;
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return memory;
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}
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inline size_t LinearStream::getMaxAvailableSpace() const {
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return maxAvailableSpace;
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}
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inline size_t LinearStream::getAvailableSpace() const {
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DEBUG_BREAK_IF(sizeUsed > maxAvailableSpace);
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return maxAvailableSpace - sizeUsed;
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}
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inline size_t LinearStream::getUsed() const {
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return sizeUsed;
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}
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inline void LinearStream::overrideMaxSize(size_t newMaxSize) {
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maxAvailableSpace = newMaxSize;
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}
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inline void LinearStream::replaceBuffer(void *buffer, size_t bufferSize) {
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this->buffer = buffer;
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maxAvailableSpace = bufferSize;
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sizeUsed = 0;
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}
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inline GraphicsAllocation *LinearStream::getGraphicsAllocation() const {
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return graphicsAllocation;
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}
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inline void LinearStream::replaceGraphicsAllocation(GraphicsAllocation *gfxAllocation) {
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graphicsAllocation = gfxAllocation;
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}
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} // namespace NEO
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