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27494a2 @jdelong Pull from FB rev 63ce89e2f2301e6bba44a111cc7d4218022156f6
jdelong authored
1 /*
2 * Copyright 2012 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/ThreadCachedArena.h"
18
19 namespace folly {
20
21 ThreadCachedArena::ThreadCachedArena(size_t minBlockSize)
22 : minBlockSize_(minBlockSize) {
23 }
24
25 SysArena* ThreadCachedArena::allocateThreadLocalArena() {
26 SysArena* arena = new SysArena(minBlockSize_);
27 auto disposer = [this] (SysArena* t, TLPDestructionMode mode) {
28 std::unique_ptr<SysArena> tp(t); // ensure it gets deleted
29 if (mode == TLPDestructionMode::THIS_THREAD) {
30 zombify(std::move(*t));
31 }
32 };
33 arena_.reset(arena, disposer);
34 return arena;
35 }
36
37 void ThreadCachedArena::zombify(SysArena&& arena) {
38 std::lock_guard<std::mutex> lock(zombiesMutex_);
39 zombies_.merge(std::move(arena));
40 }
41
42 } // namespace folly
43
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