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/*
Unix SMB/CIFS implementation.
Implement a stack of talloc contexts
Copyright (C) Volker Lendecke 2007
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Implement a stack of talloc frames.
*
* When a new talloc stackframe is allocated with talloc_stackframe(), then
* the TALLOC_CTX returned with talloc_tos() is reset to that new
* frame. Whenever that stack frame is TALLOC_FREE()'ed, then the reverse
* happens: The previous talloc_tos() is restored.
*
* This API is designed to be robust in the sense that if someone forgets to
* TALLOC_FREE() a stackframe, then the next outer one correctly cleans up and
* resets the talloc_tos().
*
*/
#ifndef _TALLOC_STACK_H
#define _TALLOC_STACK_H
#include <talloc.h>
/*
* Create a new talloc stack frame.
*
* When free'd, it frees all stack frames that were created after this one and
* not explicitly freed.
*/
#define talloc_stackframe() _talloc_stackframe(__location__)
#define talloc_stackframe_pool(sz) _talloc_stackframe_pool(__location__, (sz))
TALLOC_CTX *_talloc_stackframe(const char *location);
TALLOC_CTX *_talloc_stackframe_pool(const char *location, size_t poolsize);
/*
* Get us the current top of the talloc stack.
*/
TALLOC_CTX *talloc_tos(void);
/*
* return true if a talloc stackframe exists
* this can be used to prevent memory leaks for code that can
* optionally use a talloc stackframe (eg. nt_errstr())
*/
bool talloc_stackframe_exists(void);
#endif
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