2 * Copyright 2015 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 "FiberManager.h"
18 #include <sys/syscall.h>
24 #include <glog/logging.h>
26 #include <folly/experimental/fibers/Fiber.h>
27 #include <folly/experimental/fibers/LoopController.h>
29 namespace folly { namespace fibers {
31 FOLLY_TLS FiberManager* FiberManager::currentFiberManager_ = nullptr;
33 FiberManager::FiberManager(std::unique_ptr<LoopController> loopController,
35 FiberManager(LocalType<void>(),
36 std::move(loopController),
37 std::move(options)) {}
39 FiberManager::~FiberManager() {
40 if (isLoopScheduled_) {
41 loopController_->cancel();
44 while (!fibersPool_.empty()) {
45 fibersPool_.pop_front_and_dispose([] (Fiber* fiber) {
49 assert(readyFibers_.empty());
50 assert(fibersActive_ == 0);
53 LoopController& FiberManager::loopController() {
54 return *loopController_;
57 const LoopController& FiberManager::loopController() const {
58 return *loopController_;
61 bool FiberManager::hasTasks() const {
62 return fibersActive_ > 0 ||
63 !remoteReadyQueue_.empty() ||
64 !remoteTaskQueue_.empty();
67 Fiber* FiberManager::getFiber() {
68 Fiber* fiber = nullptr;
69 if (fibersPool_.empty()) {
70 fiber = new Fiber(*this);
73 fiber = &fibersPool_.front();
74 fibersPool_.pop_front();
75 assert(fibersPoolSize_ > 0);
81 bool recordStack = (options_.recordStackEvery != 0) &&
82 (fiberId_ % options_.recordStackEvery == 0);
83 fiber->init(recordStack);
87 void FiberManager::setExceptionCallback(FiberManager::ExceptionCallback ec) {
89 exceptionCallback_ = std::move(ec);
92 size_t FiberManager::fibersAllocated() const {
93 return fibersAllocated_;
96 size_t FiberManager::fibersPoolSize() const {
97 return fibersPoolSize_;
100 size_t FiberManager::stackHighWatermark() const {
101 return stackHighWatermark_;
104 void FiberManager::remoteReadyInsert(Fiber* fiber) {
106 observer_->runnable(reinterpret_cast<uintptr_t>(fiber));
108 if (remoteReadyQueue_.insertHead(fiber)) {
109 loopController_->scheduleThreadSafe();
113 void FiberManager::setObserver(ExecutionObserver* observer) {
114 observer_ = observer;