[PATCH 0/3] Preparing for --date-order=author

These three patches introduce a commit-queue API to manage a set of
commits in a priority queue, with a caller-specified comparison
function.  The priority queue replaces the singly-listed commit_list
in the topological sort function.

The series applies on top of the commit-info-slab API sesries Peff
and I did two months ago.  These three patches do not use the slab
API yet, but a follow-on patch to introduce REV_SORT_BY_AUTHOR_DATE
needs to use commit-slab to record author date for the commits being
sorted, and consult it in its comparison function when comparing the
author dates of commits.

Junio C Hamano (3):
  toposort: rename "lifo" field
  commit-queue: LIFO or priority queue of commits
  sort-in-topological-order: use commit-queue

 Makefile              |  2 ++
 builtin/log.c         |  2 +-
 builtin/show-branch.c | 14 +++++----
 commit-queue.c        | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++
 commit-queue.h        | 34 +++++++++++++++++++++
 commit.c              | 70 +++++++++++++++++++++++++-----------------
 commit.h              | 14 +++++++--
 revision.c            | 10 +++---
 revision.h            |  6 +++-
 9 files changed, 193 insertions(+), 43 deletions(-)
 create mode 100644 commit-queue.c
 create mode 100644 commit-queue.h

-- 
1.8.3-451-gb703ddf