| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/dns/serial_worker.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/location.h" | |
| 9 #include "base/message_loop/message_loop_proxy.h" | |
| 10 #include "base/threading/worker_pool.h" | |
| 11 | |
| 12 namespace net { | |
| 13 | |
| 14 SerialWorker::SerialWorker() | |
| 15 : message_loop_(base::MessageLoopProxy::current()), | |
| 16 state_(IDLE) {} | |
| 17 | |
| 18 SerialWorker::~SerialWorker() {} | |
| 19 | |
| 20 void SerialWorker::WorkNow() { | |
| 21 DCHECK(message_loop_->BelongsToCurrentThread()); | |
| 22 switch (state_) { | |
| 23 case IDLE: | |
| 24 if (!base::WorkerPool::PostTask(FROM_HERE, base::Bind( | |
| 25 &SerialWorker::DoWorkJob, this), false)) { | |
| 26 #if defined(OS_POSIX) | |
| 27 // See worker_pool_posix.cc. | |
| 28 NOTREACHED() << "WorkerPool::PostTask is not expected to fail on posix"; | |
| 29 #else | |
| 30 LOG(WARNING) << "Failed to WorkerPool::PostTask, will retry later"; | |
| 31 const int kWorkerPoolRetryDelayMs = 100; | |
| 32 message_loop_->PostDelayedTask( | |
| 33 FROM_HERE, | |
| 34 base::Bind(&SerialWorker::RetryWork, this), | |
| 35 base::TimeDelta::FromMilliseconds(kWorkerPoolRetryDelayMs)); | |
| 36 state_ = WAITING; | |
| 37 return; | |
| 38 #endif | |
| 39 } | |
| 40 state_ = WORKING; | |
| 41 return; | |
| 42 case WORKING: | |
| 43 // Remember to re-read after |DoRead| finishes. | |
| 44 state_ = PENDING; | |
| 45 return; | |
| 46 case CANCELLED: | |
| 47 case PENDING: | |
| 48 case WAITING: | |
| 49 return; | |
| 50 default: | |
| 51 NOTREACHED() << "Unexpected state " << state_; | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 void SerialWorker::Cancel() { | |
| 56 DCHECK(message_loop_->BelongsToCurrentThread()); | |
| 57 state_ = CANCELLED; | |
| 58 } | |
| 59 | |
| 60 void SerialWorker::DoWorkJob() { | |
| 61 this->DoWork(); | |
| 62 // If this fails, the loop is gone, so there is no point retrying. | |
| 63 message_loop_->PostTask(FROM_HERE, base::Bind( | |
| 64 &SerialWorker::OnWorkJobFinished, this)); | |
| 65 } | |
| 66 | |
| 67 void SerialWorker::OnWorkJobFinished() { | |
| 68 DCHECK(message_loop_->BelongsToCurrentThread()); | |
| 69 switch (state_) { | |
| 70 case CANCELLED: | |
| 71 return; | |
| 72 case WORKING: | |
| 73 state_ = IDLE; | |
| 74 this->OnWorkFinished(); | |
| 75 return; | |
| 76 case PENDING: | |
| 77 state_ = IDLE; | |
| 78 WorkNow(); | |
| 79 return; | |
| 80 default: | |
| 81 NOTREACHED() << "Unexpected state " << state_; | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 void SerialWorker::RetryWork() { | |
| 86 DCHECK(message_loop_->BelongsToCurrentThread()); | |
| 87 switch (state_) { | |
| 88 case CANCELLED: | |
| 89 return; | |
| 90 case WAITING: | |
| 91 state_ = IDLE; | |
| 92 WorkNow(); | |
| 93 return; | |
| 94 default: | |
| 95 NOTREACHED() << "Unexpected state " << state_; | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 } // namespace net | |
| 100 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master