Primiano Tucci | 3264b59 | 2021-11-08 18:20:51 +0000 | [diff] [blame^] | 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 | #include "perfetto/trace_processor/trace_blob.h" |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | |
| 22 | #include "perfetto/base/logging.h" |
| 23 | #include "perfetto/ext/base/utils.h" |
| 24 | #include "perfetto/trace_processor/basic_types.h" |
| 25 | |
| 26 | namespace perfetto { |
| 27 | namespace trace_processor { |
| 28 | |
| 29 | // static |
| 30 | TraceBlob TraceBlob::Allocate(size_t size) { |
| 31 | TraceBlob blob(Ownership::kHeapBuf, new uint8_t[size], size); |
| 32 | PERFETTO_CHECK(blob.data_); |
| 33 | return blob; |
| 34 | } |
| 35 | |
| 36 | // static |
| 37 | TraceBlob TraceBlob::CopyFrom(const void* src, size_t size) { |
| 38 | TraceBlob blob = Allocate(size); |
| 39 | memcpy(blob.data_, src, size); |
| 40 | return blob; |
| 41 | } |
| 42 | |
| 43 | // static |
| 44 | TraceBlob TraceBlob::TakeOwnership(std::unique_ptr<uint8_t[]> buf, |
| 45 | size_t size) { |
| 46 | PERFETTO_CHECK(buf); |
| 47 | return TraceBlob(Ownership::kHeapBuf, buf.release(), size); |
| 48 | } |
| 49 | |
| 50 | TraceBlob::~TraceBlob() { |
| 51 | PERFETTO_CHECK(refcount_ == 0); |
| 52 | switch (ownership_) { |
| 53 | case Ownership::kHeapBuf: |
| 54 | delete[] data_; |
| 55 | break; |
| 56 | |
| 57 | case Ownership::kNull: |
| 58 | // Nothing to do. |
| 59 | break; |
| 60 | } |
| 61 | data_ = nullptr; |
| 62 | size_ = 0; |
| 63 | } |
| 64 | |
| 65 | TraceBlob& TraceBlob::operator=(TraceBlob&& other) noexcept { |
| 66 | if (this == &other) |
| 67 | return *this; |
| 68 | static_assert(sizeof(*this) == base::AlignUp<sizeof(void*)>( |
| 69 | sizeof(data_) + sizeof(size_) + |
| 70 | sizeof(ownership_) + sizeof(refcount_)), |
| 71 | "TraceBlob move operator needs updating"); |
| 72 | data_ = other.data_; |
| 73 | size_ = other.size_; |
| 74 | ownership_ = other.ownership_; |
| 75 | refcount_ = other.refcount_; |
| 76 | other.refcount_ = 0; |
| 77 | other.data_ = nullptr; |
| 78 | other.size_ = 0; |
| 79 | other.ownership_ = Ownership::kNull; |
| 80 | return *this; |
| 81 | } |
| 82 | |
| 83 | } // namespace trace_processor |
| 84 | } // namespace perfetto |