folly/wangle/bootstrap/ServerBootstrap.cpp

   1 /*
   2  * Copyright 2015 Facebook, Inc.
   3  *
   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
   7  *
   8  *   http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16 #include <folly/wangle/bootstrap/ServerBootstrap.h>
  17 #include <folly/wangle/concurrent/NamedThreadFactory.h>
  18 #include <folly/io/async/EventBaseManager.h>
  19
  20 namespace folly {
  21
  22 void ServerWorkerPool::threadStarted(
  23   folly::wangle::ThreadPoolExecutor::ThreadHandle* h) {
  24   auto worker = acceptorFactory_->newAcceptor(exec_->getEventBase(h));
  25   workers_.insert({h, worker});
  26
  27   for(auto socket : *sockets_) {
  28     socket->getEventBase()->runInEventBaseThread([this, worker, socket](){
  29       socket->addAcceptCallback(worker.get(), worker->getEventBase());
  30     });
  31   }
  32 }
  33
  34 void ServerWorkerPool::threadStopped(
  35   folly::wangle::ThreadPoolExecutor::ThreadHandle* h) {
  36   auto worker = workers_.find(h);
  37   CHECK(worker != workers_.end());
  38
  39   for (auto& socket : *sockets_) {
  40     folly::Baton<> barrier;
  41     socket->getEventBase()->runInEventBaseThread([&]() {
  42       socket->removeAcceptCallback(worker->second.get(), nullptr);
  43       barrier.post();
  44     });
  45     barrier.wait();
  46   }
  47
  48   CHECK(worker->second->getEventBase() != nullptr);
  49   CHECK(!worker->second->getEventBase()->isInEventBaseThread());
  50   folly::Baton<> barrier;
  51   worker->second->getEventBase()->runInEventBaseThread([&]() {
  52       worker->second->dropAllConnections();
  53       barrier.post();
  54   });
  55
  56   barrier.wait();
  57   workers_.erase(worker);
  58 }
  59
  60 } // namespace