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.
18 #include <folly/fibers/FiberManagerInternal.h>
19 #include <folly/fibers/LoopController.h>
20 #include <folly/io/async/EventBase.h>
31 class EventBaseLoopController : public LoopController {
33 explicit EventBaseLoopController();
34 ~EventBaseLoopController();
37 * Attach EventBase after LoopController was created.
39 void attachEventBase(folly::EventBase& eventBase);
41 folly::EventBase* getEventBase() {
45 void setLoopRunner(InlineFunctionRunner* loopRunner) {
46 loopRunner_ = loopRunner;
50 class ControllerCallback : public folly::EventBase::LoopCallback {
52 explicit ControllerCallback(EventBaseLoopController& controller)
53 : controller_(controller) {}
55 void runLoopCallback() noexcept override {
56 controller_.runLoop();
60 EventBaseLoopController& controller_;
63 class DestructionCallback : public folly::EventBase::LoopCallback {
65 DestructionCallback() : alive_(new int(42)) {}
66 ~DestructionCallback() {
70 void runLoopCallback() noexcept override {
74 std::weak_ptr<void> getWeak() {
80 std::weak_ptr<void> aliveWeak(alive_);
83 while (!aliveWeak.expired()) {
84 // Spin until all operations requiring EventBaseLoopController to be
85 // alive are complete.
89 std::shared_ptr<void> alive_;
92 bool awaitingScheduling_{false};
93 folly::EventBase* eventBase_{nullptr};
94 folly::EventBase::LoopKeepAlive eventBaseKeepAlive_;
95 ControllerCallback callback_;
96 DestructionCallback destructionCallback_;
97 FiberManager* fm_{nullptr};
98 std::atomic<bool> eventBaseAttached_{false};
99 std::weak_ptr<void> aliveWeak_;
100 InlineFunctionRunner* loopRunner_{nullptr};
102 /* LoopController interface */
104 void setFiberManager(FiberManager* fm) override;
105 void schedule() override;
106 void cancel() override;
107 void runLoop() override;
108 void scheduleThreadSafe(std::function<bool()> func) override;
109 void timedSchedule(std::function<void()> func, TimePoint time) override;
111 friend class FiberManager;
116 #include "EventBaseLoopController-inl.h"