Message receiver on browser side that holds/starts the gamepad data provider

content/browser/gamepad/gamepad_provider.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <cmath>
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/task.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/browser/gamepad/gamepad_provider.h"
 #include "content/browser/gamepad/data_fetcher.h"
 #include "content/common/gamepad_messages.h"
 
 #if defined(OS_WIN)
 #include "content/browser/gamepad/data_fetcher_win.h"
 #endif
 
 namespace gamepad {
 
-Provider* Provider::instance_ = NULL;
-
 using namespace content;
 
 // Define the default data fetcher that Provider will use if none is supplied.
 // (PlatformDataFetcher).
 #if defined(OS_WIN)
 
 typedef DataFetcherWindows PlatformDataFetcher;
 
 #else
 
@@ skipping 54 matching lines @@
 
   MessageLoop* polling_loop = polling_thread_->message_loop();
   polling_loop->PostTask(
       FROM_HERE,
       base::Bind(&Provider::DoInitializePollingThread, this));
 }
 
 void Provider::Stop() {
   DCHECK(MessageLoop::current()->message_loop_proxy() == creator_loop_);
 
+  // TODO(scottmg): Don't join the thread. See crbug.com/72286.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;

[jam, 2011/11/24 23:16:02]

hmm, no way to avoid this in this cl? these usage tend to creep in and be low
priority to remove :)

+
   polling_thread_.reset();
   data_fetcher_.reset();
 }
 
 void Provider::DoInitializePollingThread() {
   DCHECK(MessageLoop::current() == polling_thread_->message_loop());
 
   if (!provided_fetcher_.get())
     provided_fetcher_.reset(new PlatformDataFetcher);
 
@@ skipping 24 matching lines @@
       kDesiredSamplingIntervalMs);
 }
 
 GamepadHardwareBuffer* Provider::SharedMemoryAsHardwareBuffer() {
   void* mem = gamepad_shared_memory_.memory();
   DCHECK(mem);
   return static_cast<GamepadHardwareBuffer*>(mem);
 }
 
 }  // namespace gamepad