1 /* 2 * Copyright (C) 2018 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 #include "perfetto/protozero/scattered_stream_null_delegate.h" 18 19 namespace protozero { 20 21 // An implementation of ScatteredStreamWriter::Delegate which always returns 22 // the same piece of memory. 23 // This is used when we need to no-op the writers (e.g. during teardown or in 24 // case of resource exhaustion), avoiding that the clients have to deal with 25 // nullptr checks. 26 ScatteredStreamWriterNullDelegate::ScatteredStreamWriterNullDelegate( 27 size_t chunk_size) 28 : chunk_size_(chunk_size), 29 chunk_(std::unique_ptr<uint8_t[]>(new uint8_t[chunk_size_])){}; 30 31 ScatteredStreamWriterNullDelegate::~ScatteredStreamWriterNullDelegate() {} 32 33 ContiguousMemoryRange ScatteredStreamWriterNullDelegate::GetNewBuffer() { 34 return {chunk_.get(), chunk_.get() + chunk_size_}; 35 } 36 37 } // namespace protozero 38
