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| 1 // Copyright 2016 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 "services/shell/public/cpp/service_context_ref.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/memory/ptr_util.h" | |
| 9 #include "base/message_loop/message_loop.h" | |
| 10 #include "base/threading/thread_checker.h" | |
| 11 #include "base/threading/thread_task_runner_handle.h" | |
| 12 | |
| 13 namespace shell { | |
| 14 | |
| 15 class ServiceContextRefImpl : public ServiceContextRef { | |
| 16 public: | |
| 17 ServiceContextRefImpl( | |
| 18 base::WeakPtr<ServiceContextRefFactory> factory, | |
| 19 scoped_refptr<base::SingleThreadTaskRunner> service_task_runner) | |
| 20 : factory_(factory), | |
| 21 service_task_runner_(service_task_runner) { | |
| 22 // This object is not thread-safe but may be used exclusively on a different | |
| 23 // thread from the one which constructed it. | |
| 24 thread_checker_.DetachFromThread(); | |
| 25 } | |
| 26 | |
| 27 ~ServiceContextRefImpl() override { | |
| 28 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 29 | |
| 30 if (service_task_runner_->BelongsToCurrentThread() && factory_) { | |
| 31 factory_->Release(); | |
| 32 } else { | |
| 33 service_task_runner_->PostTask( | |
| 34 FROM_HERE, | |
| 35 base::Bind(&ServiceContextRefFactory::Release, factory_)); | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 private: | |
| 40 // ServiceContextRef: | |
| 41 std::unique_ptr<ServiceContextRef> Clone() override { | |
| 42 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 43 | |
| 44 if (service_task_runner_->BelongsToCurrentThread() && factory_) { | |
| 45 factory_->AddRef(); | |
| 46 } else { | |
| 47 service_task_runner_->PostTask( | |
| 48 FROM_HERE, | |
| 49 base::Bind(&ServiceContextRefFactory::AddRef, factory_)); | |
| 50 } | |
| 51 | |
| 52 return base::MakeUnique<ServiceContextRefImpl>(factory_, | |
| 53 service_task_runner_); | |
| 54 } | |
| 55 | |
| 56 base::WeakPtr<ServiceContextRefFactory> factory_; | |
| 57 scoped_refptr<base::SingleThreadTaskRunner> service_task_runner_; | |
| 58 base::ThreadChecker thread_checker_; | |
| 59 | |
| 60 DISALLOW_COPY_AND_ASSIGN(ServiceContextRefImpl); | |
| 61 }; | |
| 62 | |
| 63 ServiceContextRefFactory::ServiceContextRefFactory( | |
| 64 const base::Closure& quit_closure) | |
| 65 : quit_closure_(quit_closure), weak_factory_(this) { | |
| 66 DCHECK(!quit_closure_.is_null()); | |
| 67 } | |
| 68 | |
| 69 ServiceContextRefFactory::~ServiceContextRefFactory() {} | |
| 70 | |
| 71 std::unique_ptr<ServiceContextRef> ServiceContextRefFactory::CreateRef() { | |
| 72 AddRef(); | |
| 73 return base::MakeUnique<ServiceContextRefImpl>( | |
| 74 weak_factory_.GetWeakPtr(), base::ThreadTaskRunnerHandle::Get()); | |
| 75 } | |
| 76 | |
| 77 void ServiceContextRefFactory::AddRef() { | |
| 78 ++ref_count_; | |
| 79 } | |
| 80 | |
| 81 void ServiceContextRefFactory::Release() { | |
| 82 if (!--ref_count_) | |
| 83 quit_closure_.Run(); | |
| 84 } | |
| 85 | |
| 86 } // namespace shell | |
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Chromium Code Reviews
Issue 2419723002:
Move services/shell to services/service_manager (Closed)
