chrome/browser/media_galleries/win/portable_device_map_service.cc

   1 // Copyright 2013 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 "chrome/browser/media_galleries/win/portable_device_map_service.h"
   6
   7 #include "base/logging.h"
   8 #include "base/stl_util.h"
   9 #include "base/threading/thread_restrictions.h"
  10 #include "content/public/browser/browser_thread.h"
  11
  12 namespace {
  13
  14 base::LazyInstance<PortableDeviceMapService> g_portable_device_map_service =
  15     LAZY_INSTANCE_INITIALIZER;
  16
  17 }  // namespace
  18
  19 // static
  20 PortableDeviceMapService* PortableDeviceMapService::GetInstance() {
  21   return g_portable_device_map_service.Pointer();
  22 }
  23
  24 void PortableDeviceMapService::AddPortableDevice(
  25     const base::string16& device_location,
  26     IPortableDevice* device) {
  27   base::ThreadRestrictions::AssertIOAllowed();
  28   DCHECK(!device_location.empty());
  29   DCHECK(device);
  30   base::AutoLock lock(lock_);
  31   device_map_[device_location] = PortableDeviceInfo(device);
  32 }
  33
  34 void PortableDeviceMapService::MarkPortableDeviceForDeletion(
  35     const base::string16& device_location) {
  36   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
  37   DCHECK(!device_location.empty());
  38   base::AutoLock lock(lock_);
  39   PortableDeviceMap::iterator it = device_map_.find(device_location);
  40   if (it != device_map_.end())
  41     it->second.scheduled_to_delete = true;
  42 }
  43
  44 void PortableDeviceMapService::RemovePortableDevice(
  45     const base::string16& device_location) {
  46   base::ThreadRestrictions::AssertIOAllowed();
  47   DCHECK(!device_location.empty());
  48   base::AutoLock lock(lock_);
  49   PortableDeviceMap::const_iterator it = device_map_.find(device_location);
  50   if ((it != device_map_.end()) && it->second.scheduled_to_delete)
  51     device_map_.erase(it);
  52 }
  53
  54 IPortableDevice* PortableDeviceMapService::GetPortableDevice(
  55     const base::string16& device_location) {
  56   base::ThreadRestrictions::AssertIOAllowed();
  57   DCHECK(!device_location.empty());
  58   base::AutoLock lock(lock_);
  59   PortableDeviceMap::const_iterator it = device_map_.find(device_location);
  60   return (it == device_map_.end() || it->second.scheduled_to_delete) ?
  61       NULL : it->second.portable_device.get();
  62 }
  63
  64 PortableDeviceMapService::PortableDeviceInfo::PortableDeviceInfo()
  65     : scheduled_to_delete(false) {
  66 }
  67
  68 PortableDeviceMapService::PortableDeviceInfo::PortableDeviceInfo(
  69     IPortableDevice* device)
  70     : portable_device(device),
  71       scheduled_to_delete(false) {
  72 }
  73
  74 PortableDeviceMapService::PortableDeviceMapService() {
  75 }
  76
  77 PortableDeviceMapService::~PortableDeviceMapService() {
  78 }