| /* |
| * Copyright (C) 2018 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 "chre/util/buffer_base.h" |
| |
| #include <cstring> |
| |
| #include "chre/util/container_support.h" |
| |
| namespace chre { |
| |
| BufferBase::~BufferBase() { |
| reset(); |
| } |
| |
| void BufferBase::wrap(void *buffer, size_t size) { |
| // If buffer is nullptr, size must also be 0. |
| CHRE_ASSERT(buffer != nullptr || size == 0); |
| reset(); |
| mBuffer = buffer; |
| mSize = size; |
| } |
| |
| bool BufferBase::copy_array(const void *buffer, size_t size, |
| size_t elementSize) { |
| // If buffer is nullptr, size must also be 0. |
| CHRE_ASSERT(buffer != nullptr || size == 0); |
| |
| reset(); |
| bool success = (size == 0); |
| if (!success) { |
| size_t copyBytes = size * elementSize; |
| mBuffer = memoryAlloc(copyBytes); |
| if (mBuffer != nullptr) { |
| mBufferRequiresFree = true; |
| memcpy(mBuffer, buffer, copyBytes); |
| mSize = size; |
| success = true; |
| } |
| } |
| |
| return success; |
| } |
| |
| void BufferBase::reset() { |
| if (mBufferRequiresFree) { |
| mBufferRequiresFree = false; |
| memoryFree(mBuffer); |
| } |
| |
| mBuffer = nullptr; |
| mSize = 0; |
| } |
| |
| } // namespace chre |