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// Copyright 2014 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_path_watcher.h"
#include "base/files/file_path_watcher_kqueue.h"
#if !defined(OS_IOS)
#include "base/files/file_path_watcher_fsevents.h"
#endif
namespace base {
namespace {
class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate {
public:
bool Watch(const FilePath& path,
bool recursive,
const FilePathWatcher::Callback& callback) override {
// Use kqueue for non-recursive watches and FSEvents for recursive ones.
DCHECK(!impl_.get());
if (recursive) {
if (!FilePathWatcher::RecursiveWatchAvailable())
return false;
#if !defined(OS_IOS)
impl_ = new FilePathWatcherFSEvents();
#endif // OS_IOS
} else {
impl_ = new FilePathWatcherKQueue();
}
DCHECK(impl_.get());
return impl_->Watch(path, recursive, callback);
}
void Cancel() override {
if (impl_.get())
impl_->Cancel();
set_cancelled();
}
void CancelOnMessageLoopThread() override {
if (impl_.get())
impl_->Cancel();
set_cancelled();
}
protected:
~FilePathWatcherImpl() override {}
scoped_refptr<PlatformDelegate> impl_;
};
} // namespace
FilePathWatcher::FilePathWatcher() {
impl_ = new FilePathWatcherImpl();
}
} // namespace base
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