nn/runtime/Memory.cpp

/*
 * Copyright (C) 2017 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.
 */

#define LOG_TAG "Memory"

#include "Memory.h"

#include "HalInterfaces.h"
#include "Utils.h"

namespace android {
namespace nn {

int Memory::create(uint32_t size) {
    mHidlMemory = allocateSharedMemory(size);
    mMemory = mapMemory(mHidlMemory);
    if (mMemory == nullptr) {
        LOG(ERROR) << "Memory::create failed";
        return ANEURALNETWORKS_OP_FAILED;
    }
    return ANEURALNETWORKS_NO_ERROR;
}

uint32_t MemoryTracker::add(const Memory* memory) {
    // See if we already have this memory. If so,
    // return its index.
    auto i = mKnown.find(memory);
    if (i != mKnown.end()) {
        return i->second;
    }
    // It's a new one.  Save it an assign an index to it.
    size_t next = mKnown.size();
    if (next > 0xFFFFFFFF) {
        LOG(ERROR) << "ANeuralNetworks more than 2^32 memories.";
        return ANEURALNETWORKS_BAD_DATA;
    }
    uint32_t idx = static_cast<uint32_t>(next);
    mKnown[memory] = idx;
    mMemories.push_back(memory);
    return idx;
}

} // namespace nn
} // namespace android