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nexedi
neoppod
Commits
348ac802
Commit
348ac802
authored
Jan 15, 2018
by
Kirill Smelkov
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go/xcommon/xcontainer/list/list.go
go/xcommon/xcontainer/list/list.go
+11
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go/xcommon/xcontainer/list/list.go
View file @
348ac802
...
@@ -18,15 +18,22 @@
...
@@ -18,15 +18,22 @@
// See https://www.nexedi.com/licensing for rationale and options.
// See https://www.nexedi.com/licensing for rationale and options.
// Package list provides intrusive double-linked lists.
// Package list provides intrusive double-linked lists.
//
// Go standard library has container/list package which already provides
// double-linked lists. However in that implementation list itself is kept
// separate from data structures representing elements. This package provides
// alternative approach where elements embed necessary list heads which is
// sometimes more convenient, for example when one wants to move a list
// element in O(1) starting from pointer to just its data.
//
// TODO doc how to get to container of list head via unsafe.OffsetOf.
package
list
package
list
// Head is a list head entry for an element in an intrusive doubly-linked list.
// Head is a list head entry for an element in an intrusive doubly-linked list.
//
//
// XXX doc how to get to container of this list head via unsafe.OffsetOf
// Zero HEAD value is NOT valid - always call Init() to initialize a head
//
// before using it.
// always call Init() to initialize a head before using it.
type
Head
struct
{
type
Head
struct
{
// XXX needs to be created with .next = .prev = self
next
,
prev
*
Head
next
,
prev
*
Head
}
}
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