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// Copyright (c) 2010 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 "chrome/browser/file_system_proxy.h"
#include "base/file_util.h"
#include "chrome/browser/chrome_thread_relay.h"
namespace {
class RelayCreateOrOpen : public ChromeThreadRelay {
public:
RelayCreateOrOpen(
const FilePath& file_path,
int file_flags,
FileSystemProxy::CreateOrOpenCallback* callback)
: file_path_(file_path),
file_flags_(file_flags),
callback_(callback),
file_handle_(base::kInvalidPlatformFileValue),
created_(false) {
DCHECK(callback);
}
protected:
virtual ~RelayCreateOrOpen() {
if (file_handle_ != base::kInvalidPlatformFileValue)
FileSystemProxy::Close(file_handle_, NULL);
}
virtual void RunWork() {
file_handle_ = base::CreatePlatformFile(file_path_, file_flags_, &created_);
}
virtual void RunCallback() {
callback_->Run(base::PassPlatformFile(&file_handle_), created_);
delete callback_;
}
private:
FilePath file_path_;
int file_flags_;
FileSystemProxy::CreateOrOpenCallback* callback_;
base::PlatformFile file_handle_;
bool created_;
};
class RelayCreateTemporary : public ChromeThreadRelay {
public:
explicit RelayCreateTemporary(
FileSystemProxy::CreateTemporaryCallback* callback)
: callback_(callback),
file_handle_(base::kInvalidPlatformFileValue) {
DCHECK(callback);
}
protected:
virtual ~RelayCreateTemporary() {
if (file_handle_ != base::kInvalidPlatformFileValue)
FileSystemProxy::Close(file_handle_, NULL);
}
virtual void RunWork() {
// TODO(darin): file_util should have a variant of CreateTemporaryFile
// that returns a FilePath and a PlatformFile.
file_util::CreateTemporaryFile(&file_path_);
// Use a fixed set of flags that are appropriate for writing to a temporary
// file from the IO thread using a net::FileStream.
int file_flags =
base::PLATFORM_FILE_CREATE_ALWAYS |
base::PLATFORM_FILE_WRITE |
base::PLATFORM_FILE_ASYNC |
base::PLATFORM_FILE_TEMPORARY;
file_handle_ = base::CreatePlatformFile(file_path_, file_flags, NULL);
}
virtual void RunCallback() {
callback_->Run(base::PassPlatformFile(&file_handle_), file_path_);
delete callback_;
}
private:
FileSystemProxy::CreateTemporaryCallback* callback_;
base::PlatformFile file_handle_;
FilePath file_path_;
};
class RelayWithStatusCallback : public ChromeThreadRelay {
public:
explicit RelayWithStatusCallback(FileSystemProxy::StatusCallback* callback)
: callback_(callback),
succeeded_(false) {
// It is OK for callback to be NULL.
}
protected:
virtual void RunCallback() {
// The caller may not have been interested in the result.
if (callback_) {
callback_->Run(succeeded_);
delete callback_;
}
}
void SetStatus(bool succeeded) { succeeded_ = succeeded; }
private:
FileSystemProxy::StatusCallback* callback_;
bool succeeded_;
};
class RelayClose : public RelayWithStatusCallback {
public:
RelayClose(base::PlatformFile file_handle,
FileSystemProxy::StatusCallback* callback)
: RelayWithStatusCallback(callback),
file_handle_(file_handle) {
}
protected:
virtual void RunWork() {
SetStatus(base::ClosePlatformFile(file_handle_));
}
private:
base::PlatformFile file_handle_;
};
class RelayDelete : public RelayWithStatusCallback {
public:
RelayDelete(const FilePath& file_path,
bool recursive,
FileSystemProxy::StatusCallback* callback)
: RelayWithStatusCallback(callback),
file_path_(file_path),
recursive_(recursive) {
}
protected:
virtual void RunWork() {
SetStatus(file_util::Delete(file_path_, recursive_));
}
private:
FilePath file_path_;
bool recursive_;
};
void Start(const tracked_objects::Location& from_here,
scoped_refptr<ChromeThreadRelay> relay) {
relay->Start(ChromeThread::FILE, from_here);
}
} // namespace
void FileSystemProxy::CreateOrOpen(const FilePath& file_path, int file_flags,
CreateOrOpenCallback* callback) {
Start(FROM_HERE, new RelayCreateOrOpen(file_path, file_flags, callback));
}
void FileSystemProxy::CreateTemporary(CreateTemporaryCallback* callback) {
Start(FROM_HERE, new RelayCreateTemporary(callback));
}
void FileSystemProxy::Close(base::PlatformFile file_handle,
StatusCallback* callback) {
Start(FROM_HERE, new RelayClose(file_handle, callback));
}
void FileSystemProxy::Delete(const FilePath& file_path,
StatusCallback* callback) {
Start(FROM_HERE, new RelayDelete(file_path, false, callback));
}
void FileSystemProxy::RecursiveDelete(const FilePath& file_path,
StatusCallback* callback) {
Start(FROM_HERE, new RelayDelete(file_path, true, callback));
}
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