enderalse/source/fs.dll/common/ILinkedList.h

92 lines
1.3 KiB
C
Raw Normal View History

2021-10-06 00:45:46 +00:00
#pragma once
// ILink members must be public
template <typename T>
struct ILink
{
static const UInt32 s_offset;
ILink <T> * next;
ILink <T> * prev;
T * GetObj(void) { return (T *)(((uintptr_t)this) - s_offset); }
static ILink <T> * GetLink(T * obj) { return (ILink <T> *)(((uintptr_t)obj) + s_offset); }
void Unlink(void)
{
if(next) next->prev = prev;
if(prev) prev->next = next;
next = prev = NULL;
}
void LinkBefore(T * obj)
{
LinkBefore(GetLink(obj));
}
void LinkAfter(T * obj)
{
LinkAfter(GetLink(obj));
}
void LinkBefore(ILink <T> * link)
{
link->next = this;
link->prev = prev;
if(prev)
{
prev->next = link;
}
prev = link;
}
void LinkAfter(ILink <T> * link)
{
link->next = next;
link->prev = this;
if(next)
{
next->prev = link;
}
next = link;
}
};
template <typename T>
struct ILinkedList
{
ILink <T> begin;
ILink <T> end;
void Reset(void)
{
begin.next = &end;
begin.prev = NULL;
end.next = NULL;
end.prev = &begin;
}
void PushFront(T * obj)
{
ILink <T> * objLink = ILink <T>::GetLink(obj);
objLink->next = begin.next;
objLink->prev = &begin;
if(objLink->next)
{
objLink->next->prev = objLink;
}
begin.next = objLink;
}
};
#define ILINK_INIT(baseType, memberName) template <typename T> const UInt32 ILink <T>::s_offset = offsetof(baseType, memberName)