ladybird/Kernel/API/InodeWatcherEvent.h
sin-ack fe5ca6ca27 Kernel: Implement multi-watch InodeWatcher :^)
This patch modifies InodeWatcher to switch to a one watcher, multiple
watches architecture.  The following changes have been made:

- The watch_file syscall is removed, and in its place the
  create_iwatcher, iwatcher_add_watch and iwatcher_remove_watch calls
  have been added.
- InodeWatcher now holds multiple WatchDescriptions for each file that
  is being watched.
- The InodeWatcher file descriptor can be read from to receive events on
  all watched files.

Co-authored-by: Gunnar Beutner <gunnar@beutner.name>
2021-05-12 22:38:20 +02:00

38 lines
841 B
C++

/*
* Copyright (c) 2020-2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/EnumBits.h>
#include <AK/Types.h>
#ifdef KERNEL
# include <LibC/limits.h>
#else
# include <limits.h>
#endif
struct [[gnu::packed]] InodeWatcherEvent {
enum class Type : u32 {
Invalid = 0,
MetadataModified = 1 << 0,
ContentModified = 1 << 1,
Deleted = 1 << 2,
ChildCreated = 1 << 3,
ChildDeleted = 1 << 4,
};
int watch_descriptor { 0 };
Type type { Type::Invalid };
size_t name_length { 0 };
// This is a VLA which is written during the read() from the descriptor.
const char name[];
};
AK_ENUM_BITWISE_OPERATORS(InodeWatcherEvent::Type);
constexpr unsigned MAXIMUM_EVENT_SIZE = sizeof(InodeWatcherEvent) + NAME_MAX + 1;