From 2ce406ccb85c4546b6d19309a6101b37c7bd952e Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Thu, 30 Oct 2014 12:20:44 -0700 Subject: [PATCH] get_merge_bases(): always clean-up object flags The callers of get_merge_bases() can choose to leave object flags used during the merge-base traversal by passing cleanup=0 as a parameter, but in practice a very few callers can afford to do so (namely, "git merge-base"), as they need to compute merge base in preparation for other processing of their own and they need to see the object without contaminate flags. Change the function signature of get_merge_bases_many() and get_merge_bases() to drop the cleanup parameter, so that the majority of the callers do not have to say ", 1" at the end. Give a new get_merge_bases_many_dirty() API to support only a few callers that know they do not need to spend cycles cleaning up the object flags. Signed-off-by: Junio C Hamano --- bisect.c | 2 +- builtin/merge-base.c | 4 ++-- builtin/merge.c | 4 ++-- builtin/rev-parse.c | 2 +- commit.c | 29 +++++++++++++++++++++-------- commit.h | 7 +++++-- merge-recursive.c | 2 +- notes-merge.c | 2 +- revision.c | 4 ++-- sha1_name.c | 2 +- submodule.c | 2 +- 11 files changed, 38 insertions(+), 22 deletions(-) diff --git a/bisect.c b/bisect.c index 604c577caa..1d6b393f36 100644 --- a/bisect.c +++ b/bisect.c @@ -776,7 +776,7 @@ static void check_merge_bases(int no_checkout) int rev_nr; struct commit **rev = get_bad_and_good_commits(&rev_nr); - result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 1); + result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1); for (; result; result = result->next) { const unsigned char *mb = result->item->object.sha1; diff --git a/builtin/merge-base.c b/builtin/merge-base.c index 0ecde8da30..fdebef6fa1 100644 --- a/builtin/merge-base.c +++ b/builtin/merge-base.c @@ -10,7 +10,7 @@ static int show_merge_base(struct commit **rev, int rev_nr, int show_all) { struct commit_list *result; - result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 0); + result = get_merge_bases_many_dirty(rev[0], rev_nr - 1, rev + 1); if (!result) return 1; @@ -176,7 +176,7 @@ static int handle_fork_point(int argc, const char **argv) for (i = 0; i < revs.nr; i++) revs.commit[i]->object.flags &= ~TMP_MARK; - bases = get_merge_bases_many(derived, revs.nr, revs.commit, 0); + bases = get_merge_bases_many_dirty(derived, revs.nr, revs.commit); /* * There should be one and only one merge base, when we found diff --git a/builtin/merge.c b/builtin/merge.c index 8763b2efa2..fbdbd78da1 100644 --- a/builtin/merge.c +++ b/builtin/merge.c @@ -1330,7 +1330,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix) if (!remoteheads) ; /* already up-to-date */ else if (!remoteheads->next) - common = get_merge_bases(head_commit, remoteheads->item, 1); + common = get_merge_bases(head_commit, remoteheads->item); else { struct commit_list *list = remoteheads; commit_list_insert(head_commit, &list); @@ -1427,7 +1427,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix) * merge_bases again, otherwise "git merge HEAD^ * HEAD^^" would be missed. */ - common_one = get_merge_bases(head_commit, j->item, 1); + common_one = get_merge_bases(head_commit, j->item); if (hashcmp(common_one->item->object.sha1, j->item->object.sha1)) { up_to_date = 0; diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c index 1a6122d3ae..ed6db3731a 100644 --- a/builtin/rev-parse.c +++ b/builtin/rev-parse.c @@ -277,7 +277,7 @@ static int try_difference(const char *arg) struct commit *a, *b; a = lookup_commit_reference(sha1); b = lookup_commit_reference(end); - exclude = get_merge_bases(a, b, 1); + exclude = get_merge_bases(a, b); while (exclude) { struct commit_list *n = exclude->next; show_rev(REVERSED, diff --git a/commit.c b/commit.c index 65179f96ee..8f9f37e3e6 100644 --- a/commit.c +++ b/commit.c @@ -883,7 +883,7 @@ struct commit_list *get_octopus_merge_bases(struct commit_list *in) for (j = ret; j; j = j->next) { struct commit_list *bases; - bases = get_merge_bases(i->item, j->item, 1); + bases = get_merge_bases(i->item, j->item); if (!new) new = bases; else @@ -952,10 +952,10 @@ static int remove_redundant(struct commit **array, int cnt) return filled; } -struct commit_list *get_merge_bases_many(struct commit *one, - int n, - struct commit **twos, - int cleanup) +static struct commit_list *get_merge_bases_many_0(struct commit *one, + int n, + struct commit **twos, + int cleanup) { struct commit_list *list; struct commit **rslt; @@ -998,10 +998,23 @@ struct commit_list *get_merge_bases_many(struct commit *one, return result; } -struct commit_list *get_merge_bases(struct commit *one, struct commit *two, - int cleanup) +struct commit_list *get_merge_bases_many(struct commit *one, + int n, + struct commit **twos) +{ + return get_merge_bases_many_0(one, n, twos, 1); +} + +struct commit_list *get_merge_bases_many_dirty(struct commit *one, + int n, + struct commit **twos) +{ + return get_merge_bases_many_0(one, n, twos, 0); +} + +struct commit_list *get_merge_bases(struct commit *one, struct commit *two) { - return get_merge_bases_many(one, 1, &two, cleanup); + return get_merge_bases_many_0(one, 1, &two, 1); } /* diff --git a/commit.h b/commit.h index 2e1492a6e4..7cd4503581 100644 --- a/commit.h +++ b/commit.h @@ -223,10 +223,13 @@ struct commit_graft *read_graft_line(char *buf, int len); int register_commit_graft(struct commit_graft *, int); struct commit_graft *lookup_commit_graft(const unsigned char *sha1); -extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup); -extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup); +extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2); +extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos); extern struct commit_list *get_octopus_merge_bases(struct commit_list *in); +/* To be used only when object flags after this call no longer matter */ +extern struct commit_list *get_merge_bases_many_dirty(struct commit *one, int n, struct commit **twos); + /* largest positive number a signed 32-bit integer can contain */ #define INFINITE_DEPTH 0x7fffffff diff --git a/merge-recursive.c b/merge-recursive.c index d38a3b2eb5..0b7bb6d547 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -1904,7 +1904,7 @@ int merge_recursive(struct merge_options *o, } if (!ca) { - ca = get_merge_bases(h1, h2, 1); + ca = get_merge_bases(h1, h2); ca = reverse_commit_list(ca); } diff --git a/notes-merge.c b/notes-merge.c index fd5fae255d..c6de891e49 100644 --- a/notes-merge.c +++ b/notes-merge.c @@ -594,7 +594,7 @@ int notes_merge(struct notes_merge_options *o, assert(local && remote); /* Find merge bases */ - bases = get_merge_bases(local, remote, 1); + bases = get_merge_bases(local, remote); if (!bases) { base_sha1 = null_sha1; base_tree_sha1 = EMPTY_TREE_SHA1_BIN; diff --git a/revision.c b/revision.c index 2571ada6bf..07a8ca1ac6 100644 --- a/revision.c +++ b/revision.c @@ -1383,7 +1383,7 @@ static void prepare_show_merge(struct rev_info *revs) other = lookup_commit_or_die(sha1, "MERGE_HEAD"); add_pending_object(revs, &head->object, "HEAD"); add_pending_object(revs, &other->object, "MERGE_HEAD"); - bases = get_merge_bases(head, other, 1); + bases = get_merge_bases(head, other); add_rev_cmdline_list(revs, bases, REV_CMD_MERGE_BASE, UNINTERESTING | BOTTOM); add_pending_commit_list(revs, bases, UNINTERESTING | BOTTOM); free_commit_list(bases); @@ -1488,7 +1488,7 @@ int handle_revision_arg(const char *arg_, struct rev_info *revs, int flags, unsi : lookup_commit_reference(b_obj->sha1)); if (!a || !b) goto missing; - exclude = get_merge_bases(a, b, 1); + exclude = get_merge_bases(a, b); add_rev_cmdline_list(revs, exclude, REV_CMD_MERGE_BASE, flags_exclude); diff --git a/sha1_name.c b/sha1_name.c index c2c938c4e1..3e9e86cbee 100644 --- a/sha1_name.c +++ b/sha1_name.c @@ -987,7 +987,7 @@ int get_sha1_mb(const char *name, unsigned char *sha1) two = lookup_commit_reference_gently(sha1_tmp, 0); if (!two) return -1; - mbs = get_merge_bases(one, two, 1); + mbs = get_merge_bases(one, two); if (!mbs || mbs->next) st = -1; else { diff --git a/submodule.c b/submodule.c index b80ecacf60..10b2ddb870 100644 --- a/submodule.c +++ b/submodule.c @@ -301,7 +301,7 @@ static int prepare_submodule_summary(struct rev_info *rev, const char *path, left->object.flags |= SYMMETRIC_LEFT; add_pending_object(rev, &left->object, path); add_pending_object(rev, &right->object, path); - merge_bases = get_merge_bases(left, right, 1); + merge_bases = get_merge_bases(left, right); if (merge_bases) { if (merge_bases->item == left) *fast_forward = 1; -- 2.11.4.GIT