Isolated FS for media devices.

webkit/fileapi/media/mtp_device_interface_impl_linux.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/fileapi/media/mtp_device_interface_impl_linux.h"
+
+#include "base/sequenced_task_runner.h"
+
+namespace fileapi {
+
+MtpDeviceInterfaceImplLinux::MtpDeviceInterfaceImplLinux(
+    const FilePath::StringType& device_id,
+    base::SequencedTaskRunner* media_task_runner)
+    : device_id_(device_id),
+      media_task_runner_(media_task_runner) {
+  // Initialize the device in LazyInit() function.
+  // This object is constructed on IO thread.
+}
+
+MtpDeviceInterfaceImplLinux::~MtpDeviceInterfaceImplLinux() {
+  // Do the clean up in DeleteOnCurrentThread() function.

[kinuko, 2012/07/28 02:29:59]

nit: Current -> Correct

[kmadhusu, 2012/07/28 23:15:30]

Done.

+  // This object is destructed by media_task_runner.
+}
+
+bool MtpDeviceInterfaceImplLinux::LazyInit() {
+  if (!media_task_runner_->RunsTasksOnCurrentThread())
+    return false;
+
+  // TODO(kmadhusu, thestig): Open the device for communication. If is already
+  // opened, return.
+  return true;
+}
+
+void MtpDeviceInterfaceImplLinux::DeleteOnCorrectThread() const {
+  media_task_runner_->DeleteSoon(FROM_HERE, this);
+}
+
+
+PlatformFileError MtpDeviceInterfaceImplLinux::GetFileInfo(
+    const FilePath& file_path,
+    PlatformFileInfo* file_info) {
+  if (!LazyInit())
+    return base::PLATFORM_FILE_ERROR_SECURITY;
+
+  NOTIMPLEMENTED();
+  return base::PLATFORM_FILE_ERROR_SECURITY;
+}
+
+FileSystemFileUtil::AbstractFileEnumerator*
+    MtpDeviceInterfaceImplLinux::CreateFileEnumerator(
+        const FilePath& root,
+        bool recursive) {
+  if (!LazyInit())
+    return new FileSystemFileUtil::EmptyFileEnumerator();
+
+  NOTIMPLEMENTED();
+  return new FileSystemFileUtil::EmptyFileEnumerator();
+}
+
+PlatformFileError MtpDeviceInterfaceImplLinux::Touch(
+    const FilePath& file_path,
+    const base::Time& last_access_time,
+    const base::Time& last_modified_time) {
+  if (!LazyInit())
+    return base::PLATFORM_FILE_ERROR_SECURITY;
+
+  NOTIMPLEMENTED();
+  return base::PLATFORM_FILE_ERROR_SECURITY;
+}
+
+bool MtpDeviceInterfaceImplLinux::PathExists(const FilePath& file_path) {
+  if (!LazyInit())
+    return false;
+
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool MtpDeviceInterfaceImplLinux::DirectoryExists(const FilePath& file_path) {
+  if (!LazyInit())
+    return false;
+
+  NOTIMPLEMENTED();
+  return false;
+}
+
+bool MtpDeviceInterfaceImplLinux::IsDirectoryEmpty(const FilePath& file_path) {
+  if (!LazyInit())
+    return false;
+
+  NOTIMPLEMENTED();
+  return true;
+}
+
+}  // namespace fileapi