1 | /* |
2 | * Copyright 2012-present Facebook, Inc. |
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 <folly/memory/ThreadCachedArena.h> |
18 | |
19 | #include <memory> |
20 | |
21 | namespace folly { |
22 | |
23 | ThreadCachedArena::ThreadCachedArena(size_t minBlockSize, size_t maxAlign) |
24 | : minBlockSize_(minBlockSize), maxAlign_(maxAlign) {} |
25 | |
26 | SysArena* ThreadCachedArena::allocateThreadLocalArena() { |
27 | SysArena* arena = |
28 | new SysArena(minBlockSize_, SysArena::kNoSizeLimit, maxAlign_); |
29 | auto disposer = [this](SysArena* t, TLPDestructionMode mode) { |
30 | std::unique_ptr<SysArena> tp(t); // ensure it gets deleted |
31 | if (mode == TLPDestructionMode::THIS_THREAD) { |
32 | zombify(std::move(*t)); |
33 | } |
34 | }; |
35 | arena_.reset(arena, disposer); |
36 | return arena; |
37 | } |
38 | |
39 | void ThreadCachedArena::zombify(SysArena&& arena) { |
40 | zombies_->merge(std::move(arena)); |
41 | } |
42 | |
43 | size_t ThreadCachedArena::totalSize() const { |
44 | size_t result = sizeof(ThreadCachedArena); |
45 | for (const auto& arena : arena_.accessAllThreads()) { |
46 | result += arena.totalSize(); |
47 | } |
48 | result += zombies_->totalSize() - sizeof(SysArena); |
49 | return result; |
50 | } |
51 | |
52 | } // namespace folly |
53 | |