tree a64febcbbaf366663779047ac42b152dfc0cf92f
parent b01d28f9766c96ebe4d29b9e8cc0c24c689fc03f
author Thierry FOURNIER <thierry.fournier@ozon.io> 1504204518 +0200
committer Willy Tarreau <w@1wt.eu> 1505149180 +0200
encoding latin1

MINOR: xref: Add a new xref system

xref is used to create a relation between two elements.
Once an element is released, it breaks the relation. If the
relation is already broken, it frees the xref struct.
The pointer between two elements is a sort of refcount with
max value 1. The relation is only between two elements.
The pointer and the type of element a and b are conventional.

Note that xref is initialised from Lua files because Lua is
the only one user.