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64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <memory>
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#include "base/files/file_path_watcher.h"
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#include "base/files/file_path_watcher_kqueue.h"
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#include "base/macros.h"
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#include "base/memory/ptr_util.h"
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#include "build/build_config.h"
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#if !defined(OS_IOS)
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#include "base/files/file_path_watcher_fsevents.h"
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#endif
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namespace base {
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namespace {
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class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate {
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public:
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FilePathWatcherImpl() = default;
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~FilePathWatcherImpl() override = default;
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bool Watch(const FilePath& path,
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bool recursive,
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const FilePathWatcher::Callback& callback) override {
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// Use kqueue for non-recursive watches and FSEvents for recursive ones.
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DCHECK(!impl_.get());
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if (recursive) {
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if (!FilePathWatcher::RecursiveWatchAvailable())
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return false;
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#if !defined(OS_IOS)
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impl_ = std::make_unique<FilePathWatcherFSEvents>();
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#endif // OS_IOS
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} else {
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impl_ = std::make_unique<FilePathWatcherKQueue>();
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}
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DCHECK(impl_.get());
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return impl_->Watch(path, recursive, callback);
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}
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void Cancel() override {
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if (impl_.get())
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impl_->Cancel();
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set_cancelled();
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}
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private:
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std::unique_ptr<PlatformDelegate> impl_;
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DISALLOW_COPY_AND_ASSIGN(FilePathWatcherImpl);
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};
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} // namespace
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FilePathWatcher::FilePathWatcher() {
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sequence_checker_.DetachFromSequence();
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impl_ = std::make_unique<FilePathWatcherImpl>();
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}
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} // namespace base
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