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Commit Graph

4 Commits

Author SHA1 Message Date
Volker Lendecke
5274d8cda3 Only realloc the talloc stack if necessary
(This used to be commit c7cb98d486)
2008-01-08 22:18:08 +01:00
Volker Lendecke
8d261ee580 talloc_stackframe only needs 1 talloc
(This used to be commit c0c2084d40)
2008-01-07 21:18:00 +01:00
Volker Lendecke
2800362e3f r24902: DEBUG might use talloc_tos() itself...
(This used to be commit 1b39374a17)
2007-10-10 12:30:28 -05:00
Volker Lendecke
929e1d9920 r24809: Consolidate the use of temporary talloc contexts.
This adds the two functions talloc_stackframe() and talloc_tos().

 * 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().

The original motivation for this patch was to get rid of the
sid_string_static & friends buffers. Explicitly passing talloc context
everywhere clutters code too much for my taste, so an implicit
talloc_tos() is introduced here. Many of these static buffers are
replaced by a single static pointer.

The intended use would thus be that low-level functions can rather
freely push stuff to talloc_tos, the upper layers clean up by freeing
the stackframe. The more of these stackframes are used and correctly
freed the more exact the memory cleanup happens.

This patch removes the main_loop_talloc_ctx, tmp_talloc_ctx and
lp_talloc_ctx (did I forget any?)

So, never do a

tmp_ctx = talloc_init("foo");

anymore, instead, use

tmp_ctx = talloc_stackframe()

:-)

Volker
(This used to be commit 6585ea2cb7)
2007-10-10 12:30:24 -05:00