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      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_orientation_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 = DataFetcherOrientationAndroid::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
     60