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c55e8f2a1a
Signed-off-by: Andreas Schneider <asn@samba.org> Reviewed-by: Volker Lendecke <vl@samba.org>
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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Implement a stack of talloc contexts
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Copyright (C) Volker Lendecke 2007
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Implement a stack of talloc frames.
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*
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* When a new talloc stackframe is allocated with talloc_stackframe(), then
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* the TALLOC_CTX returned with talloc_tos() is reset to that new
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* frame. Whenever that stack frame is TALLOC_FREE()'ed, then the reverse
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* happens: The previous talloc_tos() is restored.
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*
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* This API is designed to be robust in the sense that if someone forgets to
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* TALLOC_FREE() a stackframe, then the next outer one correctly cleans up and
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* resets the talloc_tos().
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*
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*/
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#ifndef _TALLOC_STACK_H
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#define _TALLOC_STACK_H
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#include <talloc.h>
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/*
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* Create a new talloc stack frame.
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*
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* When free'd, it frees all stack frames that were created after this one and
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* not explicitly freed.
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*/
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#define talloc_stackframe() _talloc_stackframe(__location__)
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#define talloc_stackframe_pool(sz) _talloc_stackframe_pool(__location__, (sz))
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TALLOC_CTX *_talloc_stackframe(const char *location);
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TALLOC_CTX *_talloc_stackframe_pool(const char *location, size_t poolsize);
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/*
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* Get us the current top of the talloc stack.
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*/
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#define talloc_tos() _talloc_tos(__location__)
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TALLOC_CTX *_talloc_tos(const char *location);
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/*
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* return true if a talloc stackframe exists
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* this can be used to prevent memory leaks for code that can
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* optionally use a talloc stackframe (eg. nt_errstr())
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*/
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bool talloc_stackframe_exists(void);
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#endif
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