2 * Copyright 2016 Facebook, Inc.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #include <folly/ThreadCachedArena.h>
23 ThreadCachedArena::ThreadCachedArena(size_t minBlockSize, size_t maxAlign)
24 : minBlockSize_(minBlockSize), maxAlign_(maxAlign) {
27 SysArena* ThreadCachedArena::allocateThreadLocalArena() {
29 new SysArena(minBlockSize_, SysArena::kNoSizeLimit, maxAlign_);
30 auto disposer = [this] (SysArena* t, TLPDestructionMode mode) {
31 std::unique_ptr<SysArena> tp(t); // ensure it gets deleted
32 if (mode == TLPDestructionMode::THIS_THREAD) {
33 zombify(std::move(*t));
36 arena_.reset(arena, disposer);
40 void ThreadCachedArena::zombify(SysArena&& arena) {
41 zombies_->merge(std::move(arena));
44 size_t ThreadCachedArena::totalSize() const {
45 size_t result = sizeof(ThreadCachedArena);
46 for (const auto& arena : arena_.accessAllThreads()) {
47 result += arena.totalSize();
49 result += zombies_->totalSize() - sizeof(SysArena);