52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <folly/memory/ThreadCachedArena.h>
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#include <memory>
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namespace folly {
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ThreadCachedArena::ThreadCachedArena(size_t minBlockSize, size_t maxAlign)
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: minBlockSize_(minBlockSize), maxAlign_(maxAlign) {}
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SysArena* ThreadCachedArena::allocateThreadLocalArena() {
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auto arena = new SysArena(minBlockSize_, SysArena::kNoSizeLimit, maxAlign_);
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auto disposer = [this](SysArena* t, TLPDestructionMode mode) {
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std::unique_ptr<SysArena> tp(t); // ensure it gets deleted
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if (mode == TLPDestructionMode::THIS_THREAD) {
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zombify(std::move(*t));
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}
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};
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arena_.reset(arena, disposer);
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return arena;
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}
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void ThreadCachedArena::zombify(SysArena&& arena) {
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zombies_.wlock()->merge(std::move(arena));
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}
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size_t ThreadCachedArena::totalSize() const {
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size_t result = sizeof(ThreadCachedArena);
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for (const auto& arena : arena_.accessAllThreads()) {
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result += arena.totalSize();
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}
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result += zombies_.rlock()->totalSize() - sizeof(SysArena);
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return result;
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}
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} // namespace folly
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