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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 17:47:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 17:47:29 +0000 |
commit | 4f5791ebd03eaec1c7da0865a383175b05102712 (patch) | |
tree | 8ce7b00f7a76baa386372422adebbe64510812d4 /lib/util/idtree.h | |
parent | Initial commit. (diff) | |
download | samba-4f5791ebd03eaec1c7da0865a383175b05102712.tar.xz samba-4f5791ebd03eaec1c7da0865a383175b05102712.zip |
Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/util/idtree.h')
-rw-r--r-- | lib/util/idtree.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/util/idtree.h b/lib/util/idtree.h new file mode 100644 index 0000000..79d2d8c --- /dev/null +++ b/lib/util/idtree.h @@ -0,0 +1,63 @@ +/* + 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_ */ |