зеркало из https://github.com/microsoft/git.git
fetch-pack: make negotiation-related vars local
Reduce the number of global variables by making the priority queue and the count of non-common commits in it local, passing them as a struct to various functions where necessary. This also helps in the case that fetch_pack() is invoked twice in the same process (when tag following is required when using a transport that does not support tag following), in that different priority queues will now be used in each invocation, instead of reusing the possibly non-empty one. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Tan
Junio C Hamano
Родитель
af1c90d13e
Коммит
d30fe89c37
116
fetch-pack.c
116
fetch-pack.c
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@ -50,8 +50,12 @@ static int marked;
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*/
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#define MAX_IN_VAIN 256
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static struct prio_queue rev_list = { compare_commits_by_commit_date };
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static int non_common_revs, multi_ack, use_sideband;
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struct negotiation_state {
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struct prio_queue rev_list;
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int non_common_revs;
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};
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static int multi_ack, use_sideband;
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/* Allow specifying sha1 if it is a ref tip. */
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#define ALLOW_TIP_SHA1 01
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/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
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@ -93,7 +97,9 @@ static void cache_one_alternate(const char *refname,
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cache->items[cache->nr++] = obj;
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}
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static void for_each_cached_alternate(void (*cb)(struct object *))
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static void for_each_cached_alternate(struct negotiation_state *ns,
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void (*cb)(struct negotiation_state *,
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struct object *))
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{
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static int initialized;
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static struct alternate_object_cache cache;
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@ -105,10 +111,11 @@ static void for_each_cached_alternate(void (*cb)(struct object *))
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}
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for (i = 0; i < cache.nr; i++)
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cb(cache.items[i]);
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cb(ns, cache.items[i]);
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}
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static void rev_list_push(struct commit *commit, int mark)
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static void rev_list_push(struct negotiation_state *ns,
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struct commit *commit, int mark)
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{
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if (!(commit->object.flags & mark)) {
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commit->object.flags |= mark;
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@ -116,19 +123,21 @@ static void rev_list_push(struct commit *commit, int mark)
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if (parse_commit(commit))
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return;
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prio_queue_put(&rev_list, commit);
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prio_queue_put(&ns->rev_list, commit);
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if (!(commit->object.flags & COMMON))
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non_common_revs++;
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ns->non_common_revs++;
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}
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}
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static int rev_list_insert_ref(const char *refname, const struct object_id *oid)
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static int rev_list_insert_ref(struct negotiation_state *ns,
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const char *refname,
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const struct object_id *oid)
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{
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struct object *o = deref_tag(parse_object(oid), refname, 0);
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if (o && o->type == OBJ_COMMIT)
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rev_list_push((struct commit *)o, SEEN);
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rev_list_push(ns, (struct commit *)o, SEEN);
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return 0;
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}
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@ -136,7 +145,7 @@ static int rev_list_insert_ref(const char *refname, const struct object_id *oid)
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static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
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int flag, void *cb_data)
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{
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return rev_list_insert_ref(refname, oid);
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return rev_list_insert_ref(cb_data, refname, oid);
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}
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static int clear_marks(const char *refname, const struct object_id *oid,
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@ -156,7 +165,7 @@ static int clear_marks(const char *refname, const struct object_id *oid,
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when only the server does not yet know that they are common).
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*/
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static void mark_common(struct commit *commit,
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static void mark_common(struct negotiation_state *ns, struct commit *commit,
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int ancestors_only, int dont_parse)
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{
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if (commit != NULL && !(commit->object.flags & COMMON)) {
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@ -166,12 +175,12 @@ static void mark_common(struct commit *commit,
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o->flags |= COMMON;
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if (!(o->flags & SEEN))
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rev_list_push(commit, SEEN);
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rev_list_push(ns, commit, SEEN);
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else {
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struct commit_list *parents;
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if (!ancestors_only && !(o->flags & POPPED))
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non_common_revs--;
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ns->non_common_revs--;
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if (!o->parsed && !dont_parse)
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if (parse_commit(commit))
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return;
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@ -179,7 +188,8 @@ static void mark_common(struct commit *commit,
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for (parents = commit->parents;
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parents;
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parents = parents->next)
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mark_common(parents->item, 0, dont_parse);
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mark_common(ns, parents->item, 0,
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dont_parse);
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}
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}
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}
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@ -188,7 +198,7 @@ static void mark_common(struct commit *commit,
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Get the next rev to send, ignoring the common.
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*/
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static const struct object_id *get_rev(void)
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static const struct object_id *get_rev(struct negotiation_state *ns)
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{
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struct commit *commit = NULL;
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@ -196,16 +206,16 @@ static const struct object_id *get_rev(void)
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unsigned int mark;
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struct commit_list *parents;
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if (rev_list.nr == 0 || non_common_revs == 0)
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if (ns->rev_list.nr == 0 || ns->non_common_revs == 0)
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return NULL;
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commit = prio_queue_get(&rev_list);
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commit = prio_queue_get(&ns->rev_list);
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parse_commit(commit);
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parents = commit->parents;
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commit->object.flags |= POPPED;
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if (!(commit->object.flags & COMMON))
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non_common_revs--;
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ns->non_common_revs--;
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if (commit->object.flags & COMMON) {
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/* do not send "have", and ignore ancestors */
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@ -220,9 +230,9 @@ static const struct object_id *get_rev(void)
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while (parents) {
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if (!(parents->item->object.flags & SEEN))
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rev_list_push(parents->item, mark);
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rev_list_push(ns, parents->item, mark);
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if (mark & COMMON)
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mark_common(parents->item, 1, 0);
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mark_common(ns, parents->item, 1, 0);
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parents = parents->next;
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}
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}
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@ -296,9 +306,10 @@ static void send_request(struct fetch_pack_args *args,
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write_or_die(fd, buf->buf, buf->len);
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}
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static void insert_one_alternate_object(struct object *obj)
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static void insert_one_alternate_object(struct negotiation_state *ns,
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struct object *obj)
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{
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rev_list_insert_ref(NULL, &obj->oid);
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rev_list_insert_ref(ns, NULL, &obj->oid);
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}
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#define INITIAL_FLUSH 16
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@ -321,7 +332,8 @@ static int next_flush(int stateless_rpc, int count)
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return count;
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}
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static int find_common(struct fetch_pack_args *args,
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static int find_common(struct negotiation_state *ns,
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struct fetch_pack_args *args,
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int fd[2], struct object_id *result_oid,
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struct ref *refs)
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{
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@ -337,8 +349,8 @@ static int find_common(struct fetch_pack_args *args,
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if (args->stateless_rpc && multi_ack == 1)
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die(_("--stateless-rpc requires multi_ack_detailed"));
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for_each_ref(rev_list_insert_ref_oid, NULL);
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for_each_cached_alternate(insert_one_alternate_object);
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for_each_ref(rev_list_insert_ref_oid, ns);
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for_each_cached_alternate(ns, insert_one_alternate_object);
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fetching = 0;
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for ( ; refs ; refs = refs->next) {
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@ -456,7 +468,7 @@ static int find_common(struct fetch_pack_args *args,
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retval = -1;
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if (args->no_dependents)
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goto done;
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while ((oid = get_rev())) {
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while ((oid = get_rev(ns))) {
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packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
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print_verbose(args, "have %s", oid_to_hex(oid));
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in_vain++;
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@ -514,7 +526,7 @@ static int find_common(struct fetch_pack_args *args,
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} else if (!args->stateless_rpc
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|| ack != ACK_common)
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in_vain = 0;
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mark_common(commit, 0, 1);
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mark_common(ns, commit, 0, 1);
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retval = 0;
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got_continue = 1;
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if (ack == ACK_ready)
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@ -704,7 +716,8 @@ static void filter_refs(struct fetch_pack_args *args,
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*refs = newlist;
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}
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static void mark_alternate_complete(struct object *obj)
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static void mark_alternate_complete(struct negotiation_state *unused,
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struct object *obj)
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{
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mark_complete(&obj->oid);
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}
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@ -741,7 +754,8 @@ static int add_loose_objects_to_set(const struct object_id *oid,
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* earliest commit time of the objects in refs that are commits and that we know
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* the commit time of.
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*/
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static void mark_complete_and_common_ref(struct fetch_pack_args *args,
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static void mark_complete_and_common_ref(struct negotiation_state *ns,
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struct fetch_pack_args *args,
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struct ref **refs)
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{
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struct ref *ref;
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@ -792,7 +806,7 @@ static void mark_complete_and_common_ref(struct fetch_pack_args *args,
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if (!args->no_dependents) {
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if (!args->deepen) {
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for_each_ref(mark_complete_oid, NULL);
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for_each_cached_alternate(mark_alternate_complete);
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for_each_cached_alternate(NULL, mark_alternate_complete);
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commit_list_sort_by_date(&complete);
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if (cutoff)
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mark_recent_complete_commits(args, cutoff);
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@ -810,9 +824,10 @@ static void mark_complete_and_common_ref(struct fetch_pack_args *args,
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continue;
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if (!(o->flags & SEEN)) {
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rev_list_push((struct commit *)o, COMMON_REF | SEEN);
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rev_list_push(ns, (struct commit *)o,
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COMMON_REF | SEEN);
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mark_common((struct commit *)o, 1, 1);
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mark_common(ns, (struct commit *)o, 1, 1);
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}
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}
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}
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@ -995,6 +1010,7 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
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struct object_id oid;
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const char *agent_feature;
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int agent_len;
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struct negotiation_state ns = { { compare_commits_by_commit_date } };
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sort_ref_list(&ref, ref_compare_name);
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QSORT(sought, nr_sought, cmp_ref_by_name);
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@ -1070,13 +1086,13 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
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if (marked)
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for_each_ref(clear_marks, NULL);
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marked = 1;
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mark_complete_and_common_ref(args, &ref);
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mark_complete_and_common_ref(&ns, args, &ref);
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filter_refs(args, &ref, sought, nr_sought);
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if (everything_local(args, &ref)) {
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packet_flush(fd[1]);
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goto all_done;
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}
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if (find_common(args, fd, &oid, ref) < 0)
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if (find_common(&ns, args, fd, &oid, ref) < 0)
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if (!args->keep_pack)
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/* When cloning, it is not unusual to have
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* no common commit.
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@ -1096,7 +1112,7 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args,
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die(_("git fetch-pack: fetch failed."));
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all_done:
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clear_prio_queue(&rev_list);
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clear_prio_queue(&ns.rev_list);
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return ref;
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}
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@ -1158,13 +1174,14 @@ static void add_common(struct strbuf *req_buf, struct oidset *common)
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}
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}
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static int add_haves(struct strbuf *req_buf, int *haves_to_send, int *in_vain)
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static int add_haves(struct negotiation_state *ns, struct strbuf *req_buf,
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int *haves_to_send, int *in_vain)
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{
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int ret = 0;
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int haves_added = 0;
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const struct object_id *oid;
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while ((oid = get_rev())) {
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while ((oid = get_rev(ns))) {
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packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid));
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if (++haves_added >= *haves_to_send)
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break;
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@ -1183,7 +1200,8 @@ static int add_haves(struct strbuf *req_buf, int *haves_to_send, int *in_vain)
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return ret;
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}
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static int send_fetch_request(int fd_out, const struct fetch_pack_args *args,
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static int send_fetch_request(struct negotiation_state *ns, int fd_out,
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const struct fetch_pack_args *args,
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const struct ref *wants, struct oidset *common,
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int *haves_to_send, int *in_vain)
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{
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@ -1239,7 +1257,7 @@ static int send_fetch_request(int fd_out, const struct fetch_pack_args *args,
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add_common(&req_buf, common);
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/* Add initial haves */
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ret = add_haves(&req_buf, haves_to_send, in_vain);
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ret = add_haves(ns, &req_buf, haves_to_send, in_vain);
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}
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/* Send request */
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@ -1276,7 +1294,9 @@ static int process_section_header(struct packet_reader *reader,
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return ret;
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}
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static int process_acks(struct packet_reader *reader, struct oidset *common)
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static int process_acks(struct negotiation_state *ns,
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struct packet_reader *reader,
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struct oidset *common)
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{
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/* received */
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int received_ready = 0;
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@ -1295,7 +1315,7 @@ static int process_acks(struct packet_reader *reader, struct oidset *common)
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struct commit *commit;
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oidset_insert(common, &oid);
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commit = lookup_commit(&oid);
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mark_common(commit, 0, 1);
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mark_common(ns, commit, 0, 1);
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}
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continue;
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}
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@ -1373,6 +1393,7 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
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struct packet_reader reader;
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int in_vain = 0;
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int haves_to_send = INITIAL_FLUSH;
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struct negotiation_state ns = { { compare_commits_by_commit_date } };
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packet_reader_init(&reader, fd[0], NULL, 0,
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PACKET_READ_CHOMP_NEWLINE);
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@ -1393,18 +1414,19 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
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marked = 1;
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/* Filter 'ref' by 'sought' and those that aren't local */
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mark_complete_and_common_ref(args, &ref);
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mark_complete_and_common_ref(&ns, args, &ref);
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filter_refs(args, &ref, sought, nr_sought);
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if (everything_local(args, &ref))
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state = FETCH_DONE;
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else
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state = FETCH_SEND_REQUEST;
|
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for_each_ref(rev_list_insert_ref_oid, NULL);
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for_each_cached_alternate(insert_one_alternate_object);
|
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for_each_ref(rev_list_insert_ref_oid, &ns);
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for_each_cached_alternate(&ns,
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insert_one_alternate_object);
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break;
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case FETCH_SEND_REQUEST:
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if (send_fetch_request(fd[1], args, ref, &common,
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if (send_fetch_request(&ns, fd[1], args, ref, &common,
|
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&haves_to_send, &in_vain))
|
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state = FETCH_GET_PACK;
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else
|
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|
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@ -1412,7 +1434,7 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
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break;
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case FETCH_PROCESS_ACKS:
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/* Process ACKs/NAKs */
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switch (process_acks(&reader, &common)) {
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switch (process_acks(&ns, &reader, &common)) {
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case 2:
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state = FETCH_GET_PACK;
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break;
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@ -1441,7 +1463,7 @@ static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
|
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}
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}
|
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|
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clear_prio_queue(&rev_list);
|
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clear_prio_queue(&ns.rev_list);
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oidset_clear(&common);
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return ref;
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}
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|
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