ladybird/Kernel/ProcessGroup.cpp
Andreas Kling 11eee67b85 Kernel: Make self-contained locking smart pointers their own classes
Until now, our kernel has reimplemented a number of AK classes to
provide automatic internal locking:

- RefPtr
- NonnullRefPtr
- WeakPtr
- Weakable

This patch renames the Kernel classes so that they can coexist with
the original AK classes:

- RefPtr => LockRefPtr
- NonnullRefPtr => NonnullLockRefPtr
- WeakPtr => LockWeakPtr
- Weakable => LockWeakable

The goal here is to eventually get rid of the Lock* classes in favor of
using external locking.
2022-08-20 17:20:43 +02:00

61 lines
1.6 KiB
C++

/*
* Copyright (c) 2020, the SerenityOS developers.
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Singleton.h>
#include <Kernel/ProcessGroup.h>
namespace Kernel {
static Singleton<SpinlockProtected<ProcessGroup::List>> s_process_groups;
SpinlockProtected<ProcessGroup::List>& process_groups()
{
return *s_process_groups;
}
ProcessGroup::~ProcessGroup()
{
process_groups().with([&](auto& groups) {
groups.remove(*this);
});
}
ErrorOr<NonnullLockRefPtr<ProcessGroup>> ProcessGroup::try_create(ProcessGroupID pgid)
{
auto process_group = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcessGroup(pgid)));
process_groups().with([&](auto& groups) {
groups.prepend(*process_group);
});
return process_group;
}
ErrorOr<NonnullLockRefPtr<ProcessGroup>> ProcessGroup::try_find_or_create(ProcessGroupID pgid)
{
return process_groups().with([&](auto& groups) -> ErrorOr<NonnullLockRefPtr<ProcessGroup>> {
for (auto& group : groups) {
if (group.pgid() == pgid)
return group;
}
auto process_group = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) ProcessGroup(pgid)));
groups.prepend(*process_group);
return process_group;
});
}
LockRefPtr<ProcessGroup> ProcessGroup::from_pgid(ProcessGroupID pgid)
{
return process_groups().with([&](auto& groups) -> LockRefPtr<ProcessGroup> {
for (auto& group : groups) {
if (group.pgid() == pgid)
return &group;
}
return nullptr;
});
}
}