1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "MemoryUtils" 18 19 #include "MemoryUtils.h" 20 21 #include <android-base/logging.h> 22 #include <android/hidl/allocator/1.0/IAllocator.h> 23 24 using ::android::hardware::hidl_memory; 25 using ::android::hidl::allocator::V1_0::IAllocator; 26 27 namespace android { 28 namespace nn { 29 allocateSharedMemory(int64_t size)30 hidl_memory allocateSharedMemory(int64_t size) { 31 static const std::string type = "ashmem"; 32 static sp<IAllocator> allocator = IAllocator::getService(type); 33 34 hidl_memory memory; 35 36 // TODO: should we align memory size to nearest page? doesn't seem necessary... 37 allocator->allocate(size, [&](bool success, const hidl_memory& mem) { 38 if (!success) { 39 LOG(ERROR) << "unable to allocate " << size << " bytes of " << type; 40 } else { 41 memory = mem; 42 } 43 }); 44 45 return memory; 46 } 47 48 } // namespace nn 49 } // namespace android 50