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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 "base/file_util_proxy.h"
#include "base/file_util.h"
#include "base/message_loop_proxy.h"
namespace {
class MessageLoopRelay
: public base::RefCountedThreadSafe<MessageLoopRelay> {
public:
MessageLoopRelay()
: origin_message_loop_proxy_(
base::MessageLoopProxy::CreateForCurrentThread()) {
}
void Start(scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
const tracked_objects::Location& from_here) {
message_loop_proxy->PostTask(
from_here,
NewRunnableMethod(this, &MessageLoopRelay::ProcessOnTargetThread));
}
protected:
friend class base::RefCountedThreadSafe<MessageLoopRelay>;
virtual ~MessageLoopRelay() {}
// Called to perform work on the FILE thread.
virtual void RunWork() = 0;
// Called to notify the callback on the origin thread.
virtual void RunCallback() = 0;
private:
void ProcessOnTargetThread() {
RunWork();
origin_message_loop_proxy_->PostTask(
FROM_HERE,
NewRunnableMethod(this, &MessageLoopRelay::RunCallback));
}
scoped_refptr<base::MessageLoopProxy> origin_message_loop_proxy_;
};
class RelayCreateOrOpen : public MessageLoopRelay {
public:
RelayCreateOrOpen(
scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
int file_flags,
base::FileUtilProxy::CreateOrOpenCallback* callback)
: message_loop_proxy_(message_loop_proxy),
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)
base::FileUtilProxy::Close(message_loop_proxy_, 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:
scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
FilePath file_path_;
int file_flags_;
base::FileUtilProxy::CreateOrOpenCallback* callback_;
base::PlatformFile file_handle_;
bool created_;
};
class RelayCreateTemporary : public MessageLoopRelay {
public:
RelayCreateTemporary(
scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
base::FileUtilProxy::CreateTemporaryCallback* callback)
: message_loop_proxy_(message_loop_proxy),
callback_(callback),
file_handle_(base::kInvalidPlatformFileValue) {
DCHECK(callback);
}
protected:
virtual ~RelayCreateTemporary() {
if (file_handle_ != base::kInvalidPlatformFileValue)
base::FileUtilProxy::Close(message_loop_proxy_, 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:
scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
base::FileUtilProxy::CreateTemporaryCallback* callback_;
base::PlatformFile file_handle_;
FilePath file_path_;
};
class RelayWithStatusCallback : public MessageLoopRelay {
public:
explicit RelayWithStatusCallback(
base::FileUtilProxy::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:
base::FileUtilProxy::StatusCallback* callback_;
bool succeeded_;
};
class RelayClose : public RelayWithStatusCallback {
public:
RelayClose(base::PlatformFile file_handle,
base::FileUtilProxy::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,
base::FileUtilProxy::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<base::MessageLoopProxy> message_loop_proxy,
scoped_refptr<MessageLoopRelay> relay) {
relay->Start(message_loop_proxy, from_here);
}
} // namespace
namespace base {
// static
void FileUtilProxy::CreateOrOpen(
scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path, int file_flags,
CreateOrOpenCallback* callback) {
Start(FROM_HERE, message_loop_proxy, new RelayCreateOrOpen(
message_loop_proxy, file_path, file_flags, callback));
}
// static
void FileUtilProxy::CreateTemporary(
scoped_refptr<MessageLoopProxy> message_loop_proxy,
CreateTemporaryCallback* callback) {
Start(FROM_HERE, message_loop_proxy,
new RelayCreateTemporary(message_loop_proxy, callback));
}
// static
void FileUtilProxy::Close(scoped_refptr<MessageLoopProxy> message_loop_proxy,
base::PlatformFile file_handle,
StatusCallback* callback) {
Start(FROM_HERE, message_loop_proxy, new RelayClose(file_handle, callback));
}
// static
void FileUtilProxy::Delete(scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
StatusCallback* callback) {
Start(FROM_HERE, message_loop_proxy,
new RelayDelete(file_path, false, callback));
}
// static
void FileUtilProxy::RecursiveDelete(
scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
StatusCallback* callback) {
Start(FROM_HERE, message_loop_proxy,
new RelayDelete(file_path, true, callback));
}
} // namespace base
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