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Kernel: Make self-contained locking smart pointers their own classes

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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.
This commit is contained in:
Andreas Kling 2022-08-19 20:53:40 +02:00
parent e475263113
commit 11eee67b85
360 changed files with 1703 additions and 1672 deletions
Download patch file Download diff file Expand all files Collapse all files

46
AK/IntrusiveList.h
View file

@ -13,6 +13,10 @@
#include <AK/Noncopyable.h>
#include <AK/StdLibExtras.h>
#ifdef KERNEL
# include <Kernel/Library/LockRefPtr.h>
#endif
namespace AK::Detail {
template<typename T, typename Container = RawPtr<T>>
@ -56,7 +60,7 @@ public:
void prepend(T& n);
void insert_before(T&, T&);
void remove(T& n);
[[nodiscard]] bool contains(const T&) const;
[[nodiscard]] bool contains(T const&) const;
[[nodiscard]] Container first() const;
[[nodiscard]] Container last() const;
@ -71,7 +75,7 @@ public:
{
}
const T& operator*() const { return *m_value; }
T const& operator*() const { return *m_value; }
auto operator->() const { return m_value; }
T& operator*() { return *m_value; }
auto operator->() { return m_value; }
@ -99,7 +103,7 @@ public:
{
}
const T& operator*() const { return *m_value; }
T const& operator*() const { return *m_value; }
auto operator->() const { return m_value; }
T& operator*() { return *m_value; }
auto operator->() { return m_value; }
@ -122,12 +126,12 @@ public:
class ConstIterator {
public:
ConstIterator() = default;
ConstIterator(const T* value)
ConstIterator(T const* value)
: m_value(value)
{
}
const T& operator*() const { return *m_value; }
T const& operator*() const { return *m_value; }
auto operator->() const { return m_value; }
bool operator==(ConstIterator const& other) const { return other.m_value == m_value; }
bool operator!=(ConstIterator const& other) const { return !(*this == other); }
@ -138,7 +142,7 @@ public:
}
private:
const T* m_value { nullptr };
T const* m_value { nullptr };
};
ConstIterator begin() const;
@ -147,8 +151,8 @@ public:
private:
static T* next(T* current);
static T* prev(T* current);
static const T* next(const T* current);
static const T* prev(const T* current);
static T const* next(T const* current);
static T const* prev(T const* current);
static T* node_to_value(SubstitutedIntrusiveListNode<T, Container>& node);
IntrusiveListStorage<T, Container> m_storage;
};
@ -284,7 +288,7 @@ inline void IntrusiveList<T, Container, member>::remove(T& n)
}
template<class T, typename Container, SubstitutedIntrusiveListNode<T, Container> T::*member>
inline bool IntrusiveList<T, Container, member>::contains(const T& n) const
inline bool IntrusiveList<T, Container, member>::contains(T const& n) const
{
auto& nnode = n.*member;
return nnode.m_storage == &m_storage;
@ -323,18 +327,18 @@ inline Container IntrusiveList<T, Container, member>::last() const
}
template<class T, typename Container, SubstitutedIntrusiveListNode<T, Container> T::*member>
inline const T* IntrusiveList<T, Container, member>::next(const T* current)
inline T const* IntrusiveList<T, Container, member>::next(T const* current)
{
auto& nextnode = (current->*member).m_next;
const T* nextstruct = nextnode ? node_to_value(*nextnode) : nullptr;
T const* nextstruct = nextnode ? node_to_value(*nextnode) : nullptr;
return nextstruct;
}
template<class T, typename Container, SubstitutedIntrusiveListNode<T, Container> T::*member>
inline const T* IntrusiveList<T, Container, member>::prev(const T* current)
inline T const* IntrusiveList<T, Container, member>::prev(T const* current)
{
auto& prevnode = (current->*member).m_prev;
const T* prevstruct = prevnode ? node_to_value(*prevnode) : nullptr;
T const* prevstruct = prevnode ? node_to_value(*prevnode) : nullptr;
return prevstruct;
}
@ -429,6 +433,22 @@ public:
[[nodiscard]] NonnullRefPtr<T> take_last() { return *IntrusiveList<T, RefPtr<T>, member>::take_last(); }
};
#ifdef KERNEL
// Specialise IntrusiveList for NonnullLockRefPtr
// By default, intrusive lists cannot contain null entries anyway, so switch to LockRefPtr
// and just make the user-facing functions deref the pointers.
template<class T, SubstitutedIntrusiveListNode<T, NonnullLockRefPtr<T>> T::*member>
class IntrusiveList<T, NonnullLockRefPtr<T>, member> : public IntrusiveList<T, LockRefPtr<T>, member> {
public:
[[nodiscard]] NonnullLockRefPtr<T> first() const { return *IntrusiveList<T, LockRefPtr<T>, member>::first(); }
[[nodiscard]] NonnullLockRefPtr<T> last() const { return *IntrusiveList<T, LockRefPtr<T>, member>::last(); }
[[nodiscard]] NonnullLockRefPtr<T> take_first() { return *IntrusiveList<T, LockRefPtr<T>, member>::take_first(); }
[[nodiscard]] NonnullLockRefPtr<T> take_last() { return *IntrusiveList<T, LockRefPtr<T>, member>::take_last(); }
};
#endif
}
namespace AK {