| /* |
| * 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. |
| */ |
| |
| #include "perfetto/protozero/packed_repeated_fields.h" |
| |
| #include "perfetto/ext/base/utils.h" |
| |
| namespace protozero { |
| |
| // static |
| constexpr size_t PackedBufferBase::kOnStackStorageSize; |
| |
| void PackedBufferBase::GrowSlowpath() { |
| size_t write_off = static_cast<size_t>(write_ptr_ - storage_begin_); |
| size_t old_size = static_cast<size_t>(storage_end_ - storage_begin_); |
| size_t new_size = old_size < 65536 ? (old_size * 2) : (old_size * 3 / 2); |
| new_size = perfetto::base::AlignUp<4096>(new_size); |
| std::unique_ptr<uint8_t[]> new_buf(new uint8_t[new_size]); |
| memcpy(new_buf.get(), storage_begin_, old_size); |
| heap_buf_ = std::move(new_buf); |
| storage_begin_ = heap_buf_.get(); |
| storage_end_ = storage_begin_ + new_size; |
| write_ptr_ = storage_begin_ + write_off; |
| } |
| |
| void PackedBufferBase::Reset() { |
| heap_buf_.reset(); |
| storage_begin_ = reinterpret_cast<uint8_t*>(&stack_buf_[0]); |
| storage_end_ = reinterpret_cast<uint8_t*>(&stack_buf_[kOnStackStorageSize]); |
| write_ptr_ = storage_begin_; |
| } |
| |
| } // namespace protozero |