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samba-mirror/source/include/talloc.h

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Ok - this is a *BIG* change - but it fixes the problems with static strings in the RPC code. This change was prompted by trying to save a long (>256) character comment in the printer properties page. The new system associates a TALLOC_CTX with the pipe struct, and frees the pool on return of a complete PDU. A global TALLOC_CTX is used for the odd buffer allocated in the BUFFERxx code, and is freed in the main loop. This code works with insure, and seems to be free of memory leaks and crashes (so far) but there are probably the occasional problem with code that uses UNISTRxx structs on the stack and expects them to contain storage without doing a init_unistrXX(). This means that rpcclient will probably be horribly broken. A TALLOC_CTX also needed associating with the struct cli_state also, to make the prs_xx code there work. The main interface change is the addition of a TALLOC_CTX to the prs_init calls - used for dynamic allocation in the prs_XXX calls. Now this is in place it should make dynamic allocation of all RPC memory on unmarshall *much* easier to fix. Jeremy.
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#ifndef _TALLOC_H_
#define _TALLOC_H_
implemented talloc() as described on samba-technical. This fixes the lp_string() bug properly. we still need to add lp_talloc_free() calls in all the main event loops, I've only put it in smbd and nmbd thus far.
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/*
Removed version number from file header. Changed "SMB/Netbios" to "SMB/CIFS" in file header.
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Unix SMB/CIFS implementation.
implemented talloc() as described on samba-technical. This fixes the lp_string() bug properly. we still need to add lp_talloc_free() calls in all the main event loops, I've only put it in smbd and nmbd thus far.
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Samba temporary memory allocation functions
Copyright (C) Andrew Tridgell 2000
Start adding some debugging features to talloc based on Samba's ancient mem_man.c: Each TALLOC_CTX now has a field to store its purpose, to aid in tracking down memory bloat. A new call talloc_init_named() should be used instead of talloc_init() so that this is set. Added talloc_vasprintf to be called by varargs functions.
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Copyright (C) 2001 by Martin Pool <mbp@samba.org>
implemented talloc() as described on samba-technical. This fixes the lp_string() bug properly. we still need to add lp_talloc_free() calls in all the main event loops, I've only put it in smbd and nmbd thus far.
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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.
*/
Doc
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/**
* @ingroup talloc
* @{
* @sa talloc.c
*/
Start adding some debugging features to talloc based on Samba's ancient mem_man.c: Each TALLOC_CTX now has a field to store its purpose, to aid in tracking down memory bloat. A new call talloc_init_named() should be used instead of talloc_init() so that this is set. Added talloc_vasprintf to be called by varargs functions.
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/**
* talloc allocation pool. All allocated blocks can be freed in one go.
**/
split some security related functions in their own files. (no need to include all of smbd files to use some basic sec functions) also minor compile fixes couldn't compile to test these due to some kerberos problems wirh 3.0, but on HEAD they're working well, so I suppose it's ok to commit
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struct talloc_chunk {
struct talloc_chunk *next;
size_t size;
void *ptr;
};
struct talloc_ctx {
struct talloc_chunk *list;
size_t total_alloc_size;
/** The name recorded for this pool, if any. Should describe
* the purpose for which it was allocated. The string is
* allocated within the pool. **/
char *name;
/** Pointer to the next allocate talloc pool, so that we can
* summarize all talloc memory usage. **/
struct talloc_ctx *next_ctx;
};
Make TALLOC_CTX and talloc_chunk private to talloc.c. Add a global singly-linked list of all active talloc pools, so that we can eventually show how much memory is used for different purposes. This also gives a check that pools are not being doubly freed. talloc_init_named now handle a NULL name properly (ie does nothing) Add accessor talloc_pool_name().
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typedef struct talloc_ctx TALLOC_CTX;
implemented talloc() as described on samba-technical. This fixes the lp_string() bug properly. we still need to add lp_talloc_free() calls in all the main event loops, I've only put it in smbd and nmbd thus far.
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Forward port the change to talloc_init() to make all talloc contexts named. Ensure we can query them. Jeremy.
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TALLOC_CTX *talloc_init(char const *fmt, ...) PRINTF_ATTRIBUTE(1, 2);
Put PRINTF_ATTRIBUTE on talloc_init_named, talloc_asprintf, talloc_vasprintf.
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char *talloc_vasprintf(TALLOC_CTX *t, const char *fmt, va_list ap)
PRINTF_ATTRIBUTE(2, 0);
char *talloc_asprintf(TALLOC_CTX *t, const char *fmt, ...)
PRINTF_ATTRIBUTE(2, 3);
Add talloc_asprintf_append, which grows an existing string buffer to contain new print-formatted information. (Also talloc_vasprintf_append.) Idea borrowed from glib.
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char *talloc_vasprintf_append(TALLOC_CTX *t, char *, const char *, va_list ap)
PRINTF_ATTRIBUTE(3, 0);
char *talloc_asprintf_append(TALLOC_CTX *t, char *, const char *, ...)
PRINTF_ATTRIBUTE(3, 4);
Doc
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/** @} */
#endif /* ndef _TALLOC_H_ */
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