Added lfsr_obshrub_t for generalized tracked bshrubs

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So now files and traversals contain several nested structs:

  file     <-- lfsr_file_t
  file.o   <-- lfsr_obshrub_t
  file.o.o <-- lfsr_omdir_t

This gets a bit ugly, but it's really the only way to make the compiler
happy when also with C's annoying strict aliasing rules.

This also makes lfsr_traversal_t a simple alias of lfsr_mtraversal_t,
with lfsr_mtraversal_t now including all of the obshrub/omdir state.
This simplifies things internally, and allows lfsr_mtree_gc to assert on
opened-list enrollment, but risks increased stack cost for all of the
unused fields.

Fortunately this stack cost turned out to not be that significant:

           code          stack
  before: 35264           2680 (+0.0%)
  after:  35256 (-0.0%)   2688 (+0.3%)

...

This commit is contained in:

Christopher Haster

2024-07-03 15:57:59 -05:00

parent 8d7e71d961

commit c316270ebb

5 changed files with 487 additions and 484 deletions

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lfs.c

+407 -391

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