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89 lines
2.7 KiB
89 lines
2.7 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "SharedMemory.h"
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#include <android-base/logging.h>
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#include <limits>
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#include <optional>
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#include <utility>
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#include <variant>
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#include <vector>
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#include "Result.h"
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#include "TypeUtils.h"
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#include "Types.h"
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namespace android::nn {
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MutableMemoryBuilder::MutableMemoryBuilder(uint32_t poolIndex) : mPoolIndex(poolIndex) {}
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DataLocation MutableMemoryBuilder::append(size_t length, size_t alignment, size_t padding) {
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CHECK_GT(length, 0u);
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mSize = roundUp(mSize, alignment);
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const size_t offset = mSize;
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const size_t paddedLength = roundUp(length, padding);
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CHECK_LE(offset, std::numeric_limits<uint32_t>::max());
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CHECK_LE(paddedLength, std::numeric_limits<uint32_t>::max());
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mSize += paddedLength;
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return {.poolIndex = mPoolIndex,
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.offset = static_cast<uint32_t>(offset),
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.length = static_cast<uint32_t>(length),
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.padding = static_cast<uint32_t>(paddedLength - length)};
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}
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bool MutableMemoryBuilder::empty() const {
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return mSize == 0;
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}
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GeneralResult<SharedMemory> MutableMemoryBuilder::finish() {
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return createSharedMemory(mSize);
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}
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ConstantMemoryBuilder::ConstantMemoryBuilder(uint32_t poolIndex) : mBuilder(poolIndex) {}
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DataLocation ConstantMemoryBuilder::append(const void* data, size_t length) {
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const auto location = mBuilder.append(length);
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CHECK_EQ(location.length, length);
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mSlices.push_back({.data = data, .length = length, .offset = location.offset});
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return location;
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}
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bool ConstantMemoryBuilder::empty() const {
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return mBuilder.empty();
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}
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GeneralResult<SharedMemory> ConstantMemoryBuilder::finish() {
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// Allocate the memory.
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auto memory = NN_TRY(mBuilder.finish());
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// Map the memory.
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const auto [pointer, size, context] = NN_TRY(map(memory););
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// Get mutable pointer.
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uint8_t* mutablePointer = static_cast<uint8_t*>(std::get<void*>(pointer));
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// Copy data to the memory pool.
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std::for_each(mSlices.begin(), mSlices.end(), [mutablePointer](const auto& slice) {
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std::memcpy(mutablePointer + slice.offset, slice.data, slice.length);
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});
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return memory;
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}
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} // namespace android::nn
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