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 #if defined(OS_WIN)
  46 void RunAdapterCallbacks() {
  47   CHECK(default_adapter.Get().get());
  48   scoped_refptr<BluetoothAdapter> adapter(default_adapter.Get().get());
  49   for (std::vector<BluetoothAdapterFactory::AdapterCallback>::const_iterator
  50            iter = adapter_callbacks.Get().begin();
  51        iter != adapter_callbacks.Get().end();
  52        ++iter) {
  53     iter->Run(adapter);
  54   }
  55   adapter_callbacks.Get().clear();
  56 }
  57 #endif  // defined(OS_WIN)
  58
  59 }  // namespace
  60
  61 namespace device {
  62
  63 // static
  64 bool BluetoothAdapterFactory::IsBluetoothAdapterAvailable() {
  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   if (!default_adapter.Get().get()) {
  77 #if defined(OS_CHROMEOS)
  78     chromeos::BluetoothAdapterChromeOS* new_adapter =
  79         new chromeos::BluetoothAdapterChromeOS();
  80     default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
  81 #elif defined(OS_WIN)
  82     BluetoothAdapterWin* new_adapter = new BluetoothAdapterWin(
  83         base::Bind(&RunAdapterCallbacks));
  84     new_adapter->Init();
  85     default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
  86 #elif defined(OS_MACOSX)
  87     BluetoothAdapterMac* new_adapter = new BluetoothAdapterMac();
  88     new_adapter->Init();
  89     default_adapter.Get() = new_adapter->weak_ptr_factory_.GetWeakPtr();
  90 #endif
  91   }
  92
  93   if (default_adapter.Get()->IsInitialized()) {
  94     callback.Run(scoped_refptr<BluetoothAdapter>(default_adapter.Get().get()));
  95   } else {
  96     adapter_callbacks.Get().push_back(callback);
  97   }
  98 }
  99
 100 // static
 101 scoped_refptr<BluetoothAdapter> BluetoothAdapterFactory::MaybeGetAdapter() {
 102   return scoped_refptr<BluetoothAdapter>(default_adapter.Get().get());
 103 }
 104
 105 }  // namespace device