blob: 447552ddaf0384e21f97ab72e55ffaea79bbe56b [file] [log] [blame]
// 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 "base/files/file_util_proxy.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/file_util.h"
#include "base/files/file.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/task_runner.h"
#include "base/task_runner_util.h"
namespace base {
namespace {
void CallWithTranslatedParameter(const FileUtilProxy::StatusCallback& callback,
bool value) {
DCHECK(!callback.is_null());
callback.Run(value ? File::FILE_OK : File::FILE_ERROR_FAILED);
}
// Helper classes or routines for individual methods.
class CreateOrOpenHelper {
public:
CreateOrOpenHelper(TaskRunner* task_runner,
const FileUtilProxy::CloseTask& close_task)
: task_runner_(task_runner),
close_task_(close_task),
file_handle_(kInvalidPlatformFileValue),
created_(false),
error_(File::FILE_OK) {}
~CreateOrOpenHelper() {
if (file_handle_ != kInvalidPlatformFileValue) {
task_runner_->PostTask(
FROM_HERE,
base::Bind(base::IgnoreResult(close_task_), file_handle_));
}
}
void RunWork(const FileUtilProxy::CreateOrOpenTask& task) {
error_ = task.Run(&file_handle_, &created_);
}
void Reply(const FileUtilProxy::CreateOrOpenCallback& callback) {
DCHECK(!callback.is_null());
callback.Run(error_, PassPlatformFile(&file_handle_), created_);
}
private:
scoped_refptr<TaskRunner> task_runner_;
FileUtilProxy::CloseTask close_task_;
PlatformFile file_handle_;
bool created_;
File::Error error_;
DISALLOW_COPY_AND_ASSIGN(CreateOrOpenHelper);
};
class CreateTemporaryHelper {
public:
explicit CreateTemporaryHelper(TaskRunner* task_runner)
: task_runner_(task_runner),
file_handle_(kInvalidPlatformFileValue),
error_(File::FILE_OK) {}
~CreateTemporaryHelper() {
if (file_handle_ != kInvalidPlatformFileValue) {
FileUtilProxy::Close(
task_runner_.get(), file_handle_, FileUtilProxy::StatusCallback());
}
}
void RunWork(int additional_file_flags) {
// TODO(darin): file_util should have a variant of CreateTemporaryFile
// that returns a FilePath and a PlatformFile.
if (!base::CreateTemporaryFile(&file_path_)) {
// TODO(davidben): base::CreateTemporaryFile should preserve the error
// code.
error_ = File::FILE_ERROR_FAILED;
return;
}
int file_flags =
PLATFORM_FILE_WRITE |
PLATFORM_FILE_TEMPORARY |
PLATFORM_FILE_CREATE_ALWAYS |
additional_file_flags;
error_ = File::FILE_OK;
// TODO(rvargas): Convert this code to use File.
file_handle_ =
CreatePlatformFile(file_path_, file_flags, NULL,
reinterpret_cast<PlatformFileError*>(&error_));
if (error_ != File::FILE_OK) {
base::DeleteFile(file_path_, false);
file_path_.clear();
}
}
void Reply(const FileUtilProxy::CreateTemporaryCallback& callback) {
DCHECK(!callback.is_null());
callback.Run(error_, PassPlatformFile(&file_handle_), file_path_);
}
private:
scoped_refptr<TaskRunner> task_runner_;
PlatformFile file_handle_;
FilePath file_path_;
File::Error error_;
DISALLOW_COPY_AND_ASSIGN(CreateTemporaryHelper);
};
class GetFileInfoHelper {
public:
GetFileInfoHelper()
: error_(File::FILE_OK) {}
void RunWorkForFilePath(const FilePath& file_path) {
if (!PathExists(file_path)) {
error_ = File::FILE_ERROR_NOT_FOUND;
return;
}
// TODO(rvargas): switch this file to base::File.
if (!GetFileInfo(file_path, reinterpret_cast<File::Info*>(&file_info_)))
error_ = File::FILE_ERROR_FAILED;
}
void RunWorkForPlatformFile(PlatformFile file) {
if (!GetPlatformFileInfo(
file, reinterpret_cast<PlatformFileInfo*>(&file_info_))) {
error_ = File::FILE_ERROR_FAILED;
}
}
void Reply(const FileUtilProxy::GetFileInfoCallback& callback) {
if (!callback.is_null()) {
callback.Run(error_, file_info_);
}
}
private:
File::Error error_;
File::Info file_info_;
DISALLOW_COPY_AND_ASSIGN(GetFileInfoHelper);
};
class ReadHelper {
public:
explicit ReadHelper(int bytes_to_read)
: buffer_(new char[bytes_to_read]),
bytes_to_read_(bytes_to_read),
bytes_read_(0) {}
void RunWork(PlatformFile file, int64 offset) {
bytes_read_ = ReadPlatformFile(file, offset, buffer_.get(), bytes_to_read_);
}
void Reply(const FileUtilProxy::ReadCallback& callback) {
if (!callback.is_null()) {
File::Error error =
(bytes_read_ < 0) ? File::FILE_ERROR_FAILED : File::FILE_OK;
callback.Run(error, buffer_.get(), bytes_read_);
}
}
private:
scoped_ptr<char[]> buffer_;
int bytes_to_read_;
int bytes_read_;
DISALLOW_COPY_AND_ASSIGN(ReadHelper);
};
class WriteHelper {
public:
WriteHelper(const char* buffer, int bytes_to_write)
: buffer_(new char[bytes_to_write]),
bytes_to_write_(bytes_to_write),
bytes_written_(0) {
memcpy(buffer_.get(), buffer, bytes_to_write);
}
void RunWork(PlatformFile file, int64 offset) {
bytes_written_ = WritePlatformFile(file, offset, buffer_.get(),
bytes_to_write_);
}
void Reply(const FileUtilProxy::WriteCallback& callback) {
if (!callback.is_null()) {
File::Error error =
(bytes_written_ < 0) ? File::FILE_ERROR_FAILED : File::FILE_OK;
callback.Run(error, bytes_written_);
}
}
private:
scoped_ptr<char[]> buffer_;
int bytes_to_write_;
int bytes_written_;
DISALLOW_COPY_AND_ASSIGN(WriteHelper);
};
File::Error CreateOrOpenAdapter(
const FilePath& file_path, int file_flags,
PlatformFile* file_handle, bool* created) {
DCHECK(file_handle);
DCHECK(created);
if (!DirectoryExists(file_path.DirName())) {
// If its parent does not exist, should return NOT_FOUND error.
return File::FILE_ERROR_NOT_FOUND;
}
File::Error error = File::FILE_OK;
*file_handle =
CreatePlatformFile(file_path, file_flags, created,
reinterpret_cast<PlatformFileError*>(&error));
return error;
}
File::Error CloseAdapter(PlatformFile file_handle) {
if (!ClosePlatformFile(file_handle)) {
return File::FILE_ERROR_FAILED;
}
return File::FILE_OK;
}
File::Error DeleteAdapter(const FilePath& file_path, bool recursive) {
if (!PathExists(file_path)) {
return File::FILE_ERROR_NOT_FOUND;
}
if (!base::DeleteFile(file_path, recursive)) {
if (!recursive && !base::IsDirectoryEmpty(file_path)) {
return File::FILE_ERROR_NOT_EMPTY;
}
return File::FILE_ERROR_FAILED;
}
return File::FILE_OK;
}
} // namespace
// static
bool FileUtilProxy::CreateOrOpen(
TaskRunner* task_runner,
const FilePath& file_path, int file_flags,
const CreateOrOpenCallback& callback) {
return RelayCreateOrOpen(
task_runner,
base::Bind(&CreateOrOpenAdapter, file_path, file_flags),
base::Bind(&CloseAdapter),
callback);
}
// static
bool FileUtilProxy::CreateTemporary(
TaskRunner* task_runner,
int additional_file_flags,
const CreateTemporaryCallback& callback) {
CreateTemporaryHelper* helper = new CreateTemporaryHelper(task_runner);
return task_runner->PostTaskAndReply(
FROM_HERE,
Bind(&CreateTemporaryHelper::RunWork, Unretained(helper),
additional_file_flags),
Bind(&CreateTemporaryHelper::Reply, Owned(helper), callback));
}
// static
bool FileUtilProxy::Close(
TaskRunner* task_runner,
base::PlatformFile file_handle,
const StatusCallback& callback) {
return RelayClose(
task_runner,
base::Bind(&CloseAdapter),
file_handle, callback);
}
// Retrieves the information about a file. It is invalid to pass NULL for the
// callback.
bool FileUtilProxy::GetFileInfo(
TaskRunner* task_runner,
const FilePath& file_path,
const GetFileInfoCallback& callback) {
GetFileInfoHelper* helper = new GetFileInfoHelper;
return task_runner->PostTaskAndReply(
FROM_HERE,
Bind(&GetFileInfoHelper::RunWorkForFilePath,
Unretained(helper), file_path),
Bind(&GetFileInfoHelper::Reply, Owned(helper), callback));
}
// static
bool FileUtilProxy::GetFileInfoFromPlatformFile(
TaskRunner* task_runner,
PlatformFile file,
const GetFileInfoCallback& callback) {
GetFileInfoHelper* helper = new GetFileInfoHelper;
return task_runner->PostTaskAndReply(
FROM_HERE,
Bind(&GetFileInfoHelper::RunWorkForPlatformFile,
Unretained(helper), file),
Bind(&GetFileInfoHelper::Reply, Owned(helper), callback));
}
// static
bool FileUtilProxy::DeleteFile(TaskRunner* task_runner,
const FilePath& file_path,
bool recursive,
const StatusCallback& callback) {
return base::PostTaskAndReplyWithResult(
task_runner, FROM_HERE,
Bind(&DeleteAdapter, file_path, recursive),
callback);
}
// static
bool FileUtilProxy::Read(
TaskRunner* task_runner,
PlatformFile file,
int64 offset,
int bytes_to_read,
const ReadCallback& callback) {
if (bytes_to_read < 0) {
return false;
}
ReadHelper* helper = new ReadHelper(bytes_to_read);
return task_runner->PostTaskAndReply(
FROM_HERE,
Bind(&ReadHelper::RunWork, Unretained(helper), file, offset),
Bind(&ReadHelper::Reply, Owned(helper), callback));
}
// static
bool FileUtilProxy::Write(
TaskRunner* task_runner,
PlatformFile file,
int64 offset,
const char* buffer,
int bytes_to_write,
const WriteCallback& callback) {
if (bytes_to_write <= 0 || buffer == NULL) {
return false;
}
WriteHelper* helper = new WriteHelper(buffer, bytes_to_write);
return task_runner->PostTaskAndReply(
FROM_HERE,
Bind(&WriteHelper::RunWork, Unretained(helper), file, offset),
Bind(&WriteHelper::Reply, Owned(helper), callback));
}
// static
bool FileUtilProxy::Touch(
TaskRunner* task_runner,
PlatformFile file,
const Time& last_access_time,
const Time& last_modified_time,
const StatusCallback& callback) {
return base::PostTaskAndReplyWithResult(
task_runner,
FROM_HERE,
Bind(&TouchPlatformFile, file,
last_access_time, last_modified_time),
Bind(&CallWithTranslatedParameter, callback));
}
// static
bool FileUtilProxy::Touch(
TaskRunner* task_runner,
const FilePath& file_path,
const Time& last_access_time,
const Time& last_modified_time,
const StatusCallback& callback) {
return base::PostTaskAndReplyWithResult(
task_runner,
FROM_HERE,
Bind(&TouchFile, file_path, last_access_time, last_modified_time),
Bind(&CallWithTranslatedParameter, callback));
}
// static
bool FileUtilProxy::Truncate(
TaskRunner* task_runner,
PlatformFile file,
int64 length,
const StatusCallback& callback) {
return base::PostTaskAndReplyWithResult(
task_runner,
FROM_HERE,
Bind(&TruncatePlatformFile, file, length),
Bind(&CallWithTranslatedParameter, callback));
}
// static
bool FileUtilProxy::Flush(
TaskRunner* task_runner,
PlatformFile file,
const StatusCallback& callback) {
return base::PostTaskAndReplyWithResult(
task_runner,
FROM_HERE,
Bind(&FlushPlatformFile, file),
Bind(&CallWithTranslatedParameter, callback));
}
// static
bool FileUtilProxy::RelayCreateOrOpen(
TaskRunner* task_runner,
const CreateOrOpenTask& open_task,
const CloseTask& close_task,
const CreateOrOpenCallback& callback) {
CreateOrOpenHelper* helper = new CreateOrOpenHelper(
task_runner, close_task);
return task_runner->PostTaskAndReply(
FROM_HERE,
Bind(&CreateOrOpenHelper::RunWork, Unretained(helper), open_task),
Bind(&CreateOrOpenHelper::Reply, Owned(helper), callback));
}
// static
bool FileUtilProxy::RelayClose(
TaskRunner* task_runner,
const CloseTask& close_task,
PlatformFile file_handle,
const StatusCallback& callback) {
return base::PostTaskAndReplyWithResult(
task_runner, FROM_HERE, Bind(close_task, file_handle), callback);
}
} // namespace base