2 * Copyright 2017 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.
16 #include <folly/io/async/VirtualEventBase.h>
20 VirtualEventBase::VirtualEventBase(EventBase& evb) : evb_(evb) {
21 evbLoopKeepAlive_ = evb_.getKeepAliveToken();
22 loopKeepAlive_ = getKeepAliveToken();
25 std::future<void> VirtualEventBase::destroy() {
26 CHECK(evb_.runInEventBaseThread([this] { loopKeepAlive_.reset(); }));
28 return std::move(destroyFuture_);
31 void VirtualEventBase::destroyImpl() {
32 // Make sure we release EventBase KeepAlive token even if exception occurs
33 auto evbLoopKeepAlive = std::move(evbLoopKeepAlive_);
37 onDestructionCallbacks_.withWLock([&](LoopCallbackList& callbacks) {
38 while (!callbacks.empty()) {
39 auto& callback = callbacks.front();
40 callbacks.pop_front();
41 callback.runLoopCallback();
45 destroyPromise_.set_value();
47 destroyPromise_.set_exception(std::current_exception());
51 VirtualEventBase::~VirtualEventBase() {
52 if (!destroyFuture_.valid()) {
55 CHECK(!evb_.inRunningEventBaseThread());
59 void VirtualEventBase::runOnDestruction(EventBase::LoopCallback* callback) {
60 onDestructionCallbacks_.withWLock([&](LoopCallbackList& callbacks) {
61 callback->cancelLoopCallback();
62 callbacks.push_back(*callback);