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