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This way talloc_stackframe() can benefit from a pool put on the stack further
up. No need to remove talloc_stackframe().
(This used to be commit be6fe381168321ae62e079cd977cbef675c532d4)
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Jeremy.
(This used to be commit d27e6c0548d21394f6399d3b737d175ffed8420d)
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(This used to be commit c7cb98d486ef8af1dc7111c2316fd73db9fef9f8)
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(This used to be commit c0c2084d40b79e949dab7c68626aa665b9ea1a8e)
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(This used to be commit 1b39374a173bf6b40426000d010d092e94afc4d7)
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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 6585ea2cb7f417e14540495b9c7380fe9c8c717b)
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