src/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 #elif defined(OS_WIN)
  18 #include "device/bluetooth/bluetooth_adapter_win.h"
  19 #elif defined(OS_MACOSX)
  20 #include "base/mac/mac_util.h"
  21 #include "device/bluetooth/bluetooth_adapter_mac.h"
  22 #endif
  23
  24 namespace {
  25
  26 using device::BluetoothAdapter;
  27 using device::BluetoothAdapterFactory;
  28
  29 // Shared default adapter instance, we don't want to keep this class around
  30 // if nobody is using it so use a WeakPtr and create the object when needed;
  31 // since Google C++ Style (and clang's static analyzer) forbids us having
  32 // exit-time destructors we use a leaky lazy instance for it.
  33 base::LazyInstance<base::WeakPtr<device::BluetoothAdapter> >::Leaky
  34     default_adapter = LAZY_INSTANCE_INITIALIZER;
  35
  36 typedef std::vector<BluetoothAdapterFactory::AdapterCallback>
  37     AdapterCallbackList;
  38
  39 // List of adapter callbacks to be called once the adapter is initialized.
  40 // Since Google C++ Style (and clang's static analyzer) forbids us having
  41 // exit-time destructors we use a lazy instance for it.
  42 base::LazyInstance<AdapterCallbackList> adapter_callbacks =
  43     LAZY_INSTANCE_INITIALIZER;
  44
  45 void RunAdapterCallbacks() {
  46   CHECK(default_adapter.Get().get());
  47   scoped_refptr<BluetoothAdapter> adapter(default_adapter.Get().get());
  48   for (std::vector<BluetoothAdapterFactory::AdapterCallback>::const_iterator
  49            iter = adapter_callbacks.Get().begin();
  50        iter != adapter_callbacks.Get().end();
  51        ++iter) {
  52     iter->Run(adapter);
  53   }
  54   adapter_callbacks.Get().clear();
  55 }
  56
  57 }  // namespace
  58
  59 namespace device {
  60
  61 // static
  62 bool BluetoothAdapterFactory::IsBluetoothAdapterAvailable() {
  63 #if defined(OS_CHROMEOS)
  64   return true;
  65 #elif defined(OS_WIN)
  66   return true;
  67 #elif defined(OS_MACOSX)
  68   return base::mac::IsOSLionOrLater();
  69 #endif
  70   return false;
  71 }
  72
  73 // static
  74 void BluetoothAdapterFactory::GetAdapter(const AdapterCallback& callback) {
  75   if (!default_adapter.Get().get()) {
  76 #if defined(OS_CHROMEOS)
  77     chromeos::BluetoothAdapterChromeOS* new_adapter =
  78         new chromeos::BluetoothAdapterChromeOS();
  79     default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
  80 #elif defined(OS_WIN)
  81     BluetoothAdapterWin* new_adapter = new BluetoothAdapterWin(
  82         base::Bind(&RunAdapterCallbacks));
  83     new_adapter->Init();
  84     default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
  85 #elif defined(OS_MACOSX)
  86     BluetoothAdapterMac* new_adapter = new BluetoothAdapterMac();
  87     new_adapter->Init();
  88     default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
  89 #endif
  90   }
  91
  92   if (default_adapter.Get()->IsInitialized()) {
  93     callback.Run(scoped_refptr<BluetoothAdapter>(default_adapter.Get().get()));
  94   } else {
  95     adapter_callbacks.Get().push_back(callback);
  96   }
  97 }
  98
  99 // static
 100 scoped_refptr<BluetoothAdapter> BluetoothAdapterFactory::MaybeGetAdapter() {
 101   return scoped_refptr<BluetoothAdapter>(default_adapter.Get().get());
 102 }
 103
 104 }  // namespace device