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ea58b8d927
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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* Copyright (c) 2021-2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/EnumBits.h>
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#include <AK/Function.h>
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#include <AK/Noncopyable.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/String.h>
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#include <Kernel/API/InodeWatcherEvent.h>
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#include <Kernel/API/InodeWatcherFlags.h>
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#include <LibCore/Notifier.h>
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namespace Core {
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struct FileWatcherEvent {
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enum class Type {
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Invalid = 0,
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MetadataModified = 1 << 0,
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ContentModified = 1 << 1,
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Deleted = 1 << 2,
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ChildCreated = 1 << 3,
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ChildDeleted = 1 << 4,
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};
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Type type;
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String event_path;
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};
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AK_ENUM_BITWISE_OPERATORS(FileWatcherEvent::Type);
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class FileWatcherBase {
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public:
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virtual ~FileWatcherBase() = default;
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ErrorOr<bool> add_watch(String path, FileWatcherEvent::Type event_mask);
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ErrorOr<bool> remove_watch(String path);
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bool is_watching(String const& path) const { return m_path_to_wd.find(path) != m_path_to_wd.end(); }
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protected:
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FileWatcherBase(int watcher_fd)
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: m_watcher_fd(watcher_fd)
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{
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}
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int m_watcher_fd { -1 };
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HashMap<String, unsigned> m_path_to_wd;
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HashMap<unsigned, String> m_wd_to_path;
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};
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class BlockingFileWatcher final : public FileWatcherBase {
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AK_MAKE_NONCOPYABLE(BlockingFileWatcher);
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public:
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explicit BlockingFileWatcher(InodeWatcherFlags = InodeWatcherFlags::None);
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~BlockingFileWatcher();
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Optional<FileWatcherEvent> wait_for_event();
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};
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class FileWatcher final : public FileWatcherBase
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, public RefCounted<FileWatcher> {
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AK_MAKE_NONCOPYABLE(FileWatcher);
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public:
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static ErrorOr<NonnullRefPtr<FileWatcher>> create(InodeWatcherFlags = InodeWatcherFlags::None);
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~FileWatcher();
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Function<void(FileWatcherEvent const&)> on_change;
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private:
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FileWatcher(int watcher_fd, NonnullRefPtr<Notifier>);
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NonnullRefPtr<Notifier> m_notifier;
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};
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}
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namespace AK {
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template<>
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struct Formatter<Core::FileWatcherEvent> : Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, Core::FileWatcherEvent const& value)
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{
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return Formatter<FormatString>::format(builder, "FileWatcherEvent(\"{}\", {})", value.event_path, value.type);
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}
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};
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template<>
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struct Formatter<Core::FileWatcherEvent::Type> : Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, Core::FileWatcherEvent::Type const& value)
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{
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char const* type;
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switch (value) {
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case Core::FileWatcherEvent::Type::ChildCreated:
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type = "ChildCreated";
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break;
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case Core::FileWatcherEvent::Type::ChildDeleted:
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type = "ChildDeleted";
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break;
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case Core::FileWatcherEvent::Type::Deleted:
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type = "Deleted";
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break;
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case Core::FileWatcherEvent::Type::ContentModified:
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type = "ContentModified";
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break;
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case Core::FileWatcherEvent::Type::MetadataModified:
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type = "MetadataModified";
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break;
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default:
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VERIFY_NOT_REACHED();
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}
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return builder.put_string(type);
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}
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};
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}
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