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/*
Unix SMB/CIFS implementation.
very efficient functions to manage mapping a id (such as a fnum) to
a pointer. This is used for fnum and search id allocation.
Copyright (C) Andrew Tridgell 2004
This code is derived from lib/idr.c in the 2.6 Linux kernel, which was
written by Jim Houston jim.houston@ccur.com, and is
Copyright (C) 2002 by Concurrent Computer Corporation
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _SAMBA_IDTREE_H_
#define _SAMBA_IDTREE_H_
#include <talloc.h>
struct idr_context;
/**
initialise a idr tree. The context return value must be passed to
all subsequent idr calls. To destroy the idr tree use talloc_free()
on this context
*/
struct idr_context *idr_init(TALLOC_CTX *mem_ctx);
/**
allocate the next available id, and assign 'ptr' into its slot.
you can retrieve later this pointer using idr_find()
*/
int idr_get_new(struct idr_context *idp, void *ptr, int limit);
/**
allocate a new id, giving the first available value greater than or
equal to the given starting id
*/
int idr_get_new_above(struct idr_context *idp, void *ptr, int starting_id, int limit);
/**
find a pointer value previously set with idr_get_new given an id
*/
void *idr_find(struct idr_context *idp, int id);
/**
remove an id from the idr tree
*/
int idr_remove(struct idr_context *idp, int id);
#endif /* _SAMBA_IDTREE_H_ */
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