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AK+Kernel: Make IntrusiveList capable of holding non-raw pointers

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This should allow creating intrusive lists that have smart pointers,
while remaining free (compared to the impl before this commit) when
holding raw pointers :^)
As a sidenote, this also adds a `RawPtr<T>` type, which is just
equivalent to `T*`.
Note that this does not actually use such functionality, but is only
expected to pave the way for #6369, to replace NonnullRefPtrVector<T>
with intrusive lists.

As it is with zero-cost things, this makes the interface a bit less nice
by requiring the type name of what an `IntrusiveListNode` holds (and
optionally its container, if not RawPtr), and also requiring the type of
the container (normally `RawPtr`) on the `IntrusiveList` instance.
This commit is contained in:
AnotherTest 2021-04-16 16:33:24 +04:30 • committed by Andreas Kling
parent fb814ee720
commit e4412f1f59
11 changed files with 143 additions and 80 deletions
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4
Kernel/WorkQueue.h
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@ -75,7 +75,7 @@ public:
private:
struct WorkItem {
IntrusiveListNode m_node;
IntrusiveListNode<WorkItem> m_node;
void (*function)(void*);
void* data;
void (*free_data)(void*);
@ -86,7 +86,7 @@ private:
RefPtr<Thread> m_thread;
WaitQueue m_wait_queue;
IntrusiveList<WorkItem, &WorkItem::m_node> m_items;
IntrusiveList<WorkItem, RawPtr<WorkItem>, &WorkItem::m_node> m_items;
SpinLock<u8> m_lock;
};