content/browser/device_orientation/provider.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 "content/browser/device_orientation/provider.h"
   6
   7 #include "base/logging.h"
   8 #include "content/browser/device_orientation/data_fetcher.h"
   9 #include "content/browser/device_orientation/provider_impl.h"
  10 #include "content/public/browser/browser_thread.h"
  11
  12 #if defined(OS_MACOSX)
  13 #include "content/browser/device_orientation/accelerometer_mac.h"
  14 #elif defined(OS_ANDROID)
  15 #include "content/browser/device_orientation/data_fetcher_impl_android.h"
  16 #elif defined(OS_WIN)
  17 #include "content/browser/device_orientation/data_fetcher_impl_win.h"
  18 #endif
  19
  20 namespace content {
  21
  22 Provider* Provider::GetInstance() {
  23   if (!instance_) {
  24     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  25     ProviderImpl::DataFetcherFactory default_factory = NULL;
  26
  27 #if defined(OS_MACOSX)
  28     default_factory = AccelerometerMac::Create;
  29 #elif defined(OS_ANDROID)
  30     default_factory = DataFetcherImplAndroid::Create;
  31 #elif defined(OS_WIN)
  32     default_factory = DataFetcherImplWin::Create;
  33 #endif
  34
  35     instance_ = new ProviderImpl(default_factory);
  36   }
  37   return instance_;
  38 }
  39
  40 void Provider::SetInstanceForTests(Provider* provider) {
  41   DCHECK(!instance_);
  42   instance_ = provider;
  43 }
  44
  45 Provider* Provider::GetInstanceForTests() {
  46   return instance_;
  47 }
  48
  49 Provider::Provider() {
  50 }
  51
  52 Provider::~Provider() {
  53   DCHECK(instance_ == this);
  54   instance_ = NULL;
  55 }
  56
  57 Provider* Provider::instance_ = NULL;
  58
  59 } //  namespace content