device/bluetooth/bluetooth_adapter_factory.cc

   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 "device/bluetooth/bluetooth_adapter_factory.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/lazy_instance.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "device/bluetooth/bluetooth_adapter.h"
  14
  15 #if defined(OS_CHROMEOS)
  16 #include "device/bluetooth/bluetooth_adapter_chromeos.h"
  17 #endif
  18
  19 #if defined(OS_MACOSX)
  20 #include "base/mac/mac_util.h"
  21 #endif
  22
  23 namespace device {
  24
  25 namespace {
  26
  27 // Shared default adapter instance.  We don't want to keep this class around
  28 // if nobody is using it, so use a WeakPtr and create the object when needed.
  29 // Since Google C++ Style (and clang's static analyzer) forbids us having
  30 // exit-time destructors, we use a leaky lazy instance for it.
  31 base::LazyInstance<base::WeakPtr<BluetoothAdapter> >::Leaky default_adapter =
  32     LAZY_INSTANCE_INITIALIZER;
  33
  34 #if defined(OS_WIN)
  35 typedef std::vector<BluetoothAdapterFactory::AdapterCallback>
  36     AdapterCallbackList;
  37
  38 // List of adapter callbacks to be called once the adapter is initialized.
  39 // Since Google C++ Style (and clang's static analyzer) forbids us having
  40 // exit-time destructors we use a lazy instance for it.
  41 base::LazyInstance<AdapterCallbackList> adapter_callbacks =
  42     LAZY_INSTANCE_INITIALIZER;
  43
  44 void RunAdapterCallbacks() {
  45   DCHECK(default_adapter.Get());
  46   scoped_refptr<BluetoothAdapter> adapter(default_adapter.Get().get());
  47   for (std::vector<BluetoothAdapterFactory::AdapterCallback>::const_iterator
  48            iter = adapter_callbacks.Get().begin();
  49        iter != adapter_callbacks.Get().end();
  50        ++iter) {
  51     iter->Run(adapter);
  52   }
  53   adapter_callbacks.Get().clear();
  54 }
  55 #endif  // defined(OS_WIN)
  56
  57 }  // namespace
  58
  59 // static
  60 bool BluetoothAdapterFactory::IsBluetoothAdapterAvailable() {
  61   // SetAdapterForTesting() may be used to provide a test or mock adapter
  62   // instance even on platforms that would otherwise not support it.
  63   if (default_adapter.Get())
  64     return true;
  65 #if defined(OS_CHROMEOS) || defined(OS_WIN)
  66   return true;
  67 #elif defined(OS_MACOSX)
  68   return base::mac::IsOSLionOrLater();
  69 #else
  70   return false;
  71 #endif
  72 }
  73
  74 // static
  75 void BluetoothAdapterFactory::GetAdapter(const AdapterCallback& callback) {
  76   DCHECK(IsBluetoothAdapterAvailable());
  77
  78 #if defined(OS_WIN)
  79   if (!default_adapter.Get()) {
  80     default_adapter.Get() =
  81         BluetoothAdapter::CreateAdapter(base::Bind(&RunAdapterCallbacks));
  82     DCHECK(!default_adapter.Get()->IsInitialized());
  83   }
  84
  85   if (!default_adapter.Get()->IsInitialized())
  86     adapter_callbacks.Get().push_back(callback);
  87 #else  // !defined(OS_WIN)
  88   if (!default_adapter.Get()) {
  89     default_adapter.Get() =
  90         BluetoothAdapter::CreateAdapter(BluetoothAdapter::InitCallback());
  91   }
  92
  93   DCHECK(default_adapter.Get()->IsInitialized());
  94 #endif  // defined(OS_WIN)
  95
  96   if (default_adapter.Get()->IsInitialized())
  97     callback.Run(scoped_refptr<BluetoothAdapter>(default_adapter.Get().get()));
  98
  99 }
 100
 101 #if defined(OS_CHROMEOS)
 102 // static
 103 void BluetoothAdapterFactory::Shutdown() {
 104   if (default_adapter.Get())
 105     default_adapter.Get().get()->Shutdown();
 106 }
 107 #endif
 108
 109 // static
 110 void BluetoothAdapterFactory::SetAdapterForTesting(
 111     scoped_refptr<BluetoothAdapter> adapter) {
 112   default_adapter.Get() = adapter->GetWeakPtrForTesting();
 113 }
 114
 115 // static
 116 bool BluetoothAdapterFactory::HasSharedInstanceForTesting() {
 117   return default_adapter.Get();
 118 }
 119
 120 }  // namespace device