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| 1 // Copyright (c) 2011 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 "content/browser/gamepad/gamepad_service.h" |
| 6 |
| 7 #include "content/browser/gamepad/data_fetcher.h" |
| 8 #include "content/browser/gamepad/gamepad_provider.h" |
| 9 #include "content/public/browser/browser_thread.h" |
| 10 #include "content/public/browser/notification_service.h" |
| 11 #include "content/public/browser/notification_source.h" |
| 12 #include "content/public/browser/notification_types.h" |
| 13 #include "content/public/browser/render_process_host.h" |
| 14 |
| 15 namespace content { |
| 16 |
| 17 GamepadService* GamepadService::instance_; |
| 18 |
| 19 GamepadService::GamepadService() : num_readers_(0) { |
| 20 } |
| 21 |
| 22 GamepadService::~GamepadService() { |
| 23 } |
| 24 |
| 25 GamepadService* GamepadService::GetInstance() { |
| 26 if (!instance_) { |
| 27 instance_ = new GamepadService(); |
| 28 instance_->AddRef(); |
| 29 } |
| 30 return instance_; |
| 31 } |
| 32 |
| 33 void GamepadService::Start( |
| 34 GamepadDataFetcher* data_fetcher, |
| 35 content::RenderProcessHost* associated_rph) { |
| 36 num_readers_++; |
| 37 if (!provider_) |
| 38 provider_ = new GamepadProvider(data_fetcher); |
| 39 DCHECK(num_readers_ > 0); |
| 40 provider_->Resume(); |
| 41 |
| 42 content::BrowserThread::PostTask( |
| 43 content::BrowserThread::UI, |
| 44 FROM_HERE, |
| 45 base::Bind(&GamepadService::RegisterForCloseNotification, |
| 46 this, |
| 47 associated_rph)); |
| 48 } |
| 49 |
| 50 void GamepadService::RegisterForCloseNotification( |
| 51 content::RenderProcessHost* rph) { |
| 52 registrar_.Add(this, |
| 53 content::NOTIFICATION_RENDERER_PROCESS_CLOSED, |
| 54 content::Source<content::RenderProcessHost>(rph)); |
| 55 } |
| 56 |
| 57 base::SharedMemoryHandle GamepadService::GetSharedMemoryHandle( |
| 58 base::ProcessHandle handle) { |
| 59 DCHECK(provider_); |
| 60 return provider_->GetRendererSharedMemoryHandle(handle); |
| 61 } |
| 62 |
| 63 void GamepadService::Stop() { |
| 64 --num_readers_; |
| 65 DCHECK(provider_); |
| 66 DCHECK(num_readers_ >= 0); |
| 67 |
| 68 if (num_readers_ == 0) |
| 69 provider_->Pause(); |
| 70 } |
| 71 |
| 72 void GamepadService::Observe(int type, |
| 73 const content::NotificationSource& source, |
| 74 const content::NotificationDetails& details) { |
| 75 switch (type) { |
| 76 case content::NOTIFICATION_RENDERER_PROCESS_CLOSED: { |
| 77 content::BrowserThread::PostTask( |
| 78 content::BrowserThread::IO, |
| 79 FROM_HERE, |
| 80 base::Bind(&GamepadService::Stop, this)); |
| 81 break; |
| 82 } |
| 83 default: { |
| 84 break; |
| 85 } |
| 86 } |
| 87 } |
| 88 |
| 89 } // namespace content |
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