[PATCH v5 02/14] Add new parameter "carry_data" for "show_object" function

[Teng Long <dyroneteng@gmail.com>]

During the pack-objects process, "show_object" function will be called
to find the object and show the process("show_object_fn" in
"list-object.h"), the function definition contains three parameters:

	1. struct object *obj(contains object type, flags, and oid).
	2. const char *name(the object name).
	3. void *show_data(function to show progress info).

This commit adds a new parameter: "void *carry_data", the reason is
mainly based on scalability and performance considerations when showing
an object, space for time, avoid costly temporary calculations in the
"show" phase. For example, carry the ownership relationship between
blob or tree object and the referred commit to avoid redundant and
expensive calculations.

Signed-off-by: Teng Long <dyroneteng@gmail.com>
---
 builtin/describe.c     |  4 ++--
 builtin/pack-objects.c | 15 ++++++++-------
 builtin/rev-list.c     |  2 +-
 list-objects.c         |  8 ++++----
 list-objects.h         |  2 +-
 pack-bitmap.c          |  8 ++++----
 reachable.c            |  8 ++++----
 7 files changed, 24 insertions(+), 23 deletions(-)

diff --git a/builtin/describe.c b/builtin/describe.c
index 40482d8e9f..045da79b5c 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -485,9 +485,9 @@ static void process_commit(struct commit *commit, void *data)
 	pcd->current_commit = commit->object.oid;
 }
 
-static void process_object(struct object *obj, const char *path, void *data)
+static void process_object(struct object *obj, const char *path, void *show_data, void *carry_data)
 {
-	struct process_commit_data *pcd = data;
+	struct process_commit_data *pcd = show_data;
 
 	if (oideq(&pcd->looking_for, &obj->oid) && !pcd->dst->len) {
 		reset_revision_walk();
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 31556e7396..5f9ec3566f 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -3068,7 +3068,7 @@ static void show_commit_pack_hint(struct commit *commit, void *_data)
 }
 
 static void show_object_pack_hint(struct object *object, const char *name,
-				  void *_data)
+				  void *show_data, void *carry_dataa)
 {
 	struct object_entry *oe = packlist_find(&to_pack, &object->oid);
 	if (!oe)
@@ -3252,7 +3252,7 @@ static void show_commit(struct commit *commit, void *data)
 		propagate_island_marks(commit);
 }
 
-static void show_object(struct object *obj, const char *name, void *data)
+static void show_object(struct object *obj, const char *name, void *show_data, void *carry_data)
 {
 	add_preferred_base_object(name);
 	add_object_entry(&obj->oid, obj->type, name, 0);
@@ -3274,7 +3274,7 @@ static void show_object(struct object *obj, const char *name, void *data)
 	}
 }
 
-static void show_object__ma_allow_any(struct object *obj, const char *name, void *data)
+static void show_object__ma_allow_any(struct object *obj, const char *name, void *show_data, void *carry_data)
 {
 	assert(arg_missing_action == MA_ALLOW_ANY);
 
@@ -3285,10 +3285,10 @@ static void show_object__ma_allow_any(struct object *obj, const char *name, void
 	if (!has_object(the_repository, &obj->oid, 0))
 		return;
 
-	show_object(obj, name, data);
+	show_object(obj, name, show_data, carry_data);
 }
 
-static void show_object__ma_allow_promisor(struct object *obj, const char *name, void *data)
+static void show_object__ma_allow_promisor(struct object *obj, const char *name, void *show_data, void *carry_data)
 {
 	assert(arg_missing_action == MA_ALLOW_PROMISOR);
 
@@ -3299,7 +3299,7 @@ static void show_object__ma_allow_promisor(struct object *obj, const char *name,
 	if (!has_object(the_repository, &obj->oid, 0) && is_promisor_object(&obj->oid))
 		return;
 
-	show_object(obj, name, data);
+	show_object(obj, name, show_data, carry_data);
 }
 
 static int option_parse_missing_action(const struct option *opt,
@@ -3547,7 +3547,8 @@ static int get_object_list_from_bitmap(struct rev_info *revs)
 
 static void record_recent_object(struct object *obj,
 				 const char *name,
-				 void *data)
+				 void *show_data,
+				 void *carry_data)
 {
 	oid_array_append(&recent_objects, &obj->oid);
 }
diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index b4d8ea0a35..1cad33d9e8 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c
@@ -266,7 +266,7 @@ static int finish_object(struct object *obj, const char *name, void *cb_data)
 	return 0;
 }
 
-static void show_object(struct object *obj, const char *name, void *cb_data)
+static void show_object(struct object *obj, const char *name, void *cb_data, void *carry_data)
 {
 	struct rev_list_info *info = cb_data;
 	struct rev_info *revs = info->revs;
diff --git a/list-objects.c b/list-objects.c
index e19589baa0..427228a3ba 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -60,7 +60,7 @@ static void process_blob(struct traversal_context *ctx,
 	if (r & LOFR_MARK_SEEN)
 		obj->flags |= SEEN;
 	if (r & LOFR_DO_SHOW)
-		ctx->show_object(obj, path->buf, ctx->show_data);
+		ctx->show_object(obj, path->buf, ctx->show_data, NULL);
 	strbuf_setlen(path, pathlen);
 }
 
@@ -191,7 +191,7 @@ static void process_tree(struct traversal_context *ctx,
 	if (r & LOFR_MARK_SEEN)
 		obj->flags |= SEEN;
 	if (r & LOFR_DO_SHOW)
-		ctx->show_object(obj, base->buf, ctx->show_data);
+		ctx->show_object(obj, base->buf, ctx->show_data, NULL);
 	if (base->len)
 		strbuf_addch(base, '/');
 
@@ -207,7 +207,7 @@ static void process_tree(struct traversal_context *ctx,
 	if (r & LOFR_MARK_SEEN)
 		obj->flags |= SEEN;
 	if (r & LOFR_DO_SHOW)
-		ctx->show_object(obj, base->buf, ctx->show_data);
+		ctx->show_object(obj, base->buf, ctx->show_data, NULL);
 
 	strbuf_setlen(base, baselen);
 	free_tree_buffer(tree);
@@ -335,7 +335,7 @@ static void traverse_trees_and_blobs(struct traversal_context *ctx,
 			continue;
 		if (obj->type == OBJ_TAG) {
 			obj->flags |= SEEN;
-			ctx->show_object(obj, name, ctx->show_data);
+			ctx->show_object(obj, name, ctx->show_data, NULL);
 			continue;
 		}
 		if (!path)
diff --git a/list-objects.h b/list-objects.h
index a952680e46..ab946d34db 100644
--- a/list-objects.h
+++ b/list-objects.h
@@ -6,7 +6,7 @@ struct object;
 struct rev_info;
 
 typedef void (*show_commit_fn)(struct commit *, void *);
-typedef void (*show_object_fn)(struct object *, const char *, void *);
+typedef void (*show_object_fn)(struct object *, const char *, void *, void *);
 void traverse_commit_list(struct rev_info *, show_commit_fn, show_object_fn, void *);
 
 typedef void (*show_edge_fn)(struct commit *);
diff --git a/pack-bitmap.c b/pack-bitmap.c
index 3ed15431cd..516eb235da 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -459,9 +459,9 @@ struct bitmap_show_data {
 	struct bitmap *base;
 };
 
-static void show_object(struct object *object, const char *name, void *data_)
+static void show_object(struct object *object, const char *name, void *show_data, void *carry_data)
 {
-	struct bitmap_show_data *data = data_;
+	struct bitmap_show_data *data = show_data;
 	int bitmap_pos;
 
 	bitmap_pos = bitmap_position(data->bitmap_git, &object->oid);
@@ -1268,9 +1268,9 @@ struct bitmap_test_data {
 };
 
 static void test_show_object(struct object *object, const char *name,
-			     void *data)
+			     void *show_data, void *carry_data)
 {
-	struct bitmap_test_data *tdata = data;
+	struct bitmap_test_data *tdata = show_data;
 	int bitmap_pos;
 
 	bitmap_pos = bitmap_position(tdata->bitmap_git, &object->oid);
diff --git a/reachable.c b/reachable.c
index 77a60c70a5..521b39edef 100644
--- a/reachable.c
+++ b/reachable.c
@@ -47,14 +47,14 @@ static int add_one_ref(const char *path, const struct object_id *oid,
  * The traversal will have already marked us as SEEN, so we
  * only need to handle any progress reporting here.
  */
-static void mark_object(struct object *obj, const char *name, void *data)
+static void mark_object(struct object *obj, const char *name, void *show_data, void *carry_data)
 {
-	update_progress(data);
+	update_progress(show_data);
 }
 
-static void mark_commit(struct commit *c, void *data)
+static void mark_commit(struct commit *c, void *show_data)
 {
-	mark_object(&c->object, NULL, data);
+	mark_object(&c->object, NULL, show_data, NULL);
 }
 
 struct recent_data {
-- 
2.31.1.456.gec51e24953