[PATCH nft 0/4] add operation cache for timestamp

[Thomas Haller <thaller@redhat.com>]

Add a cache for "time(NULL)" and tm_gmtoff from localtime_r(time(NULL), &tm).
The point is to ensure that one parse/output operation fetches the current time
and GMT offset at most once.

Follow up to ([1])

  Subject:  Re: [nft PATCH 2/2] meta: use reentrant localtime_r()/gmtime_r() functions
  Date:     Tue, 22 Aug 2023 17:15:14 +0200

[1] https://marc.info/?l=netfilter-devel&m=169271724629901&w=4

Thomas Haller (4):
  evaluate: add and use parse_ctx_init() helper method
  src: add ops_cache struct for caching information during parsing
  src: cache result of time() during parsing/output
  src: cache GMT offset for current time during parsing/output

 include/datatype.h | 22 ++++++++++++++++++++
 include/nftables.h |  3 +++
 src/datatype.c     | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 src/evaluate.c     | 29 +++++++++++++++++++-------
 src/libnftables.c  | 17 +++++++++++++++
 src/meta.c         | 43 +++++++++++++++++++-------------------
 6 files changed, 136 insertions(+), 30 deletions(-)

-- 
2.41.0