81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/*
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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/io/async/EventBaseLocal.h>
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#include <atomic>
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#include <thread>
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#include <folly/MapUtil.h>
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#include <folly/Memory.h>
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namespace folly {
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namespace detail {
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EventBaseLocalBase::~EventBaseLocalBase() {
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auto locked = eventBases_.rlock();
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for (auto* evb : *locked) {
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evb->runInEventBaseThread([this, evb, key = key_] {
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evb->localStorage_.erase(key);
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evb->localStorageToDtor_.erase(this);
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});
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}
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}
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void* EventBaseLocalBase::getVoid(EventBase& evb) {
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evb.dcheckIsInEventBaseThread();
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auto ptr = folly::get_ptr(evb.localStorage_, key_);
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return ptr ? ptr->get() : nullptr;
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}
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void EventBaseLocalBase::erase(EventBase& evb) {
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evb.dcheckIsInEventBaseThread();
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evb.localStorage_.erase(key_);
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evb.localStorageToDtor_.erase(this);
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eventBases_.wlock()->erase(&evb);
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}
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void EventBaseLocalBase::onEventBaseDestruction(EventBase& evb) {
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evb.dcheckIsInEventBaseThread();
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eventBases_.wlock()->erase(&evb);
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}
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void EventBaseLocalBase::setVoid(
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EventBase& evb, void* ptr, void (*dtor)(void*)) {
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// construct the unique-ptr eagerly, just in case anything between this and
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// the emplace below could throw
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auto erased = erased_unique_ptr{ptr, dtor};
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evb.dcheckIsInEventBaseThread();
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auto alreadyExists = evb.localStorage_.find(key_) != evb.localStorage_.end();
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evb.localStorage_.emplace(key_, std::move(erased));
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if (!alreadyExists) {
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eventBases_.wlock()->insert(&evb);
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evb.localStorageToDtor_.insert(this);
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}
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}
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std::atomic<std::size_t> EventBaseLocalBase::keyCounter_{0};
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} // namespace detail
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} // namespace folly
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