From patchwork Fri Aug 20 10:08:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Steinhardt X-Patchwork-Id: 12448821 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1437C4338F for ; Fri, 20 Aug 2021 10:08:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6F8F610F9 for ; Fri, 20 Aug 2021 10:08:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238400AbhHTKJV (ORCPT ); Fri, 20 Aug 2021 06:09:21 -0400 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:57065 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237943AbhHTKJR (ORCPT ); Fri, 20 Aug 2021 06:09:17 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 06ED05C008E; Fri, 20 Aug 2021 06:08:40 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Fri, 20 Aug 2021 06:08:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pks.im; h=date :from:to:cc:subject:message-id:references:mime-version :content-type:in-reply-to; s=fm1; bh=LZEdixNdjsqGnzyLCbI1+ntGcH0 xGuRDwcSdmxuUfl4=; b=vPVBWL5LSpsp8/JOe2BvZ+Y9F/oC3uk/3I7pEsi/xzC t9egr3KBMrIQLG3KjLLxowtUA6ooTLPAbkWPLB2rUaAuMPddGjp0XANfjIATbaKG sFku5afoa6RzKxe7JtB3ikh9QjOH4e/37ttNHko6Zpe6b6YhUv37DdJZpiDe1QDE twJlO3xsagiELGZW1DJPT7UQWiLvtJYqY82UEO65TsFsDiQBLU2vsEZkwI4LnMRC Ns7TwWkmar6qOC8zMTQvZs40Sr42HCgqVklDi10XbONJz20uwdsIJWgGFIQTjA5p UsHsKVWeADLSyelaOIeF1QpAcJ3G1mljmrnWwiGCzbw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=LZEdix NdjsqGnzyLCbI1+ntGcH0xGuRDwcSdmxuUfl4=; b=IM+71MQ5oN6ijgfp2a+S9Q vKUka0ghK4yjYMi1Rbs38Pww4eOfGRAQkTb/upF3jkKB0ezK1YqbA7J+Zmir9zZg aJlzht6ABJ4+qdfMw6iAg1DdP5+YNvPQF1Y0TevsMDNDz4f6TYzVMRRHMoCXca19 ftl12a3PsvXk6BUWiVm8PVEOhk16Xjoc1sSh9HQNK2rHaE/PCSEKeRAdSGMqXtze sMQ3mgX+WJxu5CFMUvtEBtDMwSG/TDtVse+CqtmeRvCwrdQKqFEaP7x+tCdSj6wx 3XOdpAXcvTQNKDeb7p55wCabu1hkyZSkPjprzgU3qSU9kNw8NIsIvBffuoW/5spQ == X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvtddrleelgddvvdcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhepfffhvffukfhfgggtuggjsehgtderre dttddvnecuhfhrohhmpefrrghtrhhitghkucfuthgvihhnhhgrrhguthcuoehpshesphhk shdrihhmqeenucggtffrrghtthgvrhhnpeehgefhtdefueffheekgfffudelffejtdfhvd ejkedthfehvdelgfetgfdvtedthfenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgr mhepmhgrihhlfhhrohhmpehpshesphhkshdrihhm X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 20 Aug 2021 06:08:39 -0400 (EDT) Received: from localhost (ncase [10.192.0.11]) by vm-mail.pks.im (OpenSMTPD) with ESMTPSA id 39dda667 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Fri, 20 Aug 2021 10:08:38 +0000 (UTC) Date: Fri, 20 Aug 2021 12:08:37 +0200 From: Patrick Steinhardt To: git@vger.kernel.org Cc: Jeff King , =?iso-8859-1?q?=C6var_Arnfj=F6r=F0?= Bjarmason , Junio C Hamano Subject: [PATCH 3/6] connected: refactor iterator to return next object ID directly Message-ID: <3bdad7bc8b0debd44138a4d3df5744d5a245475d.1629452412.git.ps@pks.im> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org The object ID iterator used by the connectivity checks returns the next object ID via an out-parameter and then uses a return code to indicate whether an item was found. This is a bit roundabout: instead of a separate error code, we can just retrun the next object ID directly and use `NULL` pointers as indicator that the iterator got no items left. Furthermore, this avoids a copy of the object ID. Refactor the iterator and all its implementations to return object IDs directly. While I was honestly hoping for a small speedup given that we can now avoid a copy, both versions perform the same. Still, the end result is easier to understand and thus it makes sense to keep this refactoring regardless. Signed-off-by: Patrick Steinhardt --- builtin/clone.c | 8 +++----- builtin/fetch.c | 7 +++---- builtin/receive-pack.c | 17 +++++++---------- connected.c | 15 ++++++++------- connected.h | 2 +- fetch-pack.c | 7 +++---- 6 files changed, 25 insertions(+), 31 deletions(-) diff --git a/builtin/clone.c b/builtin/clone.c index a74558f30c..817a651936 100644 --- a/builtin/clone.c +++ b/builtin/clone.c @@ -544,7 +544,7 @@ static void write_followtags(const struct ref *refs, const char *msg) } } -static int iterate_ref_map(void *cb_data, struct object_id *oid) +static struct object_id *iterate_ref_map(void *cb_data) { struct ref **rm = cb_data; struct ref *ref = *rm; @@ -555,13 +555,11 @@ static int iterate_ref_map(void *cb_data, struct object_id *oid) */ while (ref && !ref->peer_ref) ref = ref->next; - /* Returning -1 notes "end of list" to the caller. */ if (!ref) - return -1; + return NULL; - oidcpy(oid, &ref->old_oid); *rm = ref->next; - return 0; + return &ref->old_oid; } static void update_remote_refs(const struct ref *refs, diff --git a/builtin/fetch.c b/builtin/fetch.c index 5fd0f7c791..76ce73ccf5 100644 --- a/builtin/fetch.c +++ b/builtin/fetch.c @@ -962,7 +962,7 @@ static int update_local_ref(struct ref *ref, } } -static int iterate_ref_map(void *cb_data, struct object_id *oid) +static struct object_id *iterate_ref_map(void *cb_data) { struct ref **rm = cb_data; struct ref *ref = *rm; @@ -970,10 +970,9 @@ static int iterate_ref_map(void *cb_data, struct object_id *oid) while (ref && ref->status == REF_STATUS_REJECT_SHALLOW) ref = ref->next; if (!ref) - return -1; /* end of the list */ + return NULL; *rm = ref->next; - oidcpy(oid, &ref->old_oid); - return 0; + return &ref->old_oid; } struct fetch_head { diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index a419de5b38..0abda033bc 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -1307,7 +1307,7 @@ static void refuse_unconfigured_deny_delete_current(void) rp_error("%s", _(refuse_unconfigured_deny_delete_current_msg)); } -static int command_singleton_iterator(void *cb_data, struct object_id *oid); +static struct object_id *command_singleton_iterator(void *cb_data); static int update_shallow_ref(struct command *cmd, struct shallow_info *si) { struct shallow_lock shallow_lock = SHALLOW_LOCK_INIT; @@ -1725,16 +1725,15 @@ static void check_aliased_updates(struct command *commands) string_list_clear(&ref_list, 0); } -static int command_singleton_iterator(void *cb_data, struct object_id *oid) +static struct object_id *command_singleton_iterator(void *cb_data) { struct command **cmd_list = cb_data; struct command *cmd = *cmd_list; if (!cmd || is_null_oid(&cmd->new_oid)) - return -1; /* end of list */ + return NULL; *cmd_list = NULL; /* this returns only one */ - oidcpy(oid, &cmd->new_oid); - return 0; + return &cmd->new_oid; } static void set_connectivity_errors(struct command *commands, @@ -1764,7 +1763,7 @@ struct iterate_data { struct shallow_info *si; }; -static int iterate_receive_command_list(void *cb_data, struct object_id *oid) +static struct object_id *iterate_receive_command_list(void *cb_data) { struct iterate_data *data = cb_data; struct command **cmd_list = &data->cmds; @@ -1775,13 +1774,11 @@ static int iterate_receive_command_list(void *cb_data, struct object_id *oid) /* to be checked in update_shallow_ref() */ continue; if (!is_null_oid(&cmd->new_oid) && !cmd->skip_update) { - oidcpy(oid, &cmd->new_oid); *cmd_list = cmd->next; - return 0; + return &cmd->new_oid; } } - *cmd_list = NULL; - return -1; /* end of list */ + return NULL; } static void reject_updates_to_hidden(struct command *commands) diff --git a/connected.c b/connected.c index b5f9523a5f..374b145355 100644 --- a/connected.c +++ b/connected.c @@ -24,7 +24,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data, struct child_process rev_list = CHILD_PROCESS_INIT; FILE *rev_list_in; struct check_connected_options defaults = CHECK_CONNECTED_INIT; - struct object_id oid; + struct object_id *oid; int err = 0; struct packed_git *new_pack = NULL; struct transport *transport; @@ -34,7 +34,8 @@ int check_connected(oid_iterate_fn fn, void *cb_data, opt = &defaults; transport = opt->transport; - if (fn(cb_data, &oid)) { + oid = fn(cb_data); + if (!oid) { if (opt->err_fd) close(opt->err_fd); return err; @@ -73,7 +74,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data, for (p = get_all_packs(the_repository); p; p = p->next) { if (!p->pack_promisor) continue; - if (find_pack_entry_one(oid.hash, p)) + if (find_pack_entry_one(oid->hash, p)) goto promisor_pack_found; } /* @@ -83,7 +84,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data, goto no_promisor_pack_found; promisor_pack_found: ; - } while (!fn(cb_data, &oid)); + } while ((oid = fn(cb_data)) != NULL); return 0; } @@ -133,12 +134,12 @@ int check_connected(oid_iterate_fn fn, void *cb_data, * are sure the ref is good and not sending it to * rev-list for verification. */ - if (new_pack && find_pack_entry_one(oid.hash, new_pack)) + if (new_pack && find_pack_entry_one(oid->hash, new_pack)) continue; - if (fprintf(rev_list_in, "%s\n", oid_to_hex(&oid)) < 0) + if (fprintf(rev_list_in, "%s\n", oid_to_hex(oid)) < 0) break; - } while (!fn(cb_data, &oid)); + } while ((oid = fn(cb_data)) != NULL); if (ferror(rev_list_in) || fflush(rev_list_in)) { if (errno != EPIPE && errno != EINVAL) diff --git a/connected.h b/connected.h index 8d5a6b3ad6..56cc95be2d 100644 --- a/connected.h +++ b/connected.h @@ -9,7 +9,7 @@ struct transport; * When called after returning the name for the last object, return -1 * to signal EOF, otherwise return 0. */ -typedef int (*oid_iterate_fn)(void *, struct object_id *oid); +typedef struct object_id *(*oid_iterate_fn)(void *); /* * Named-arguments struct for check_connected. All arguments are diff --git a/fetch-pack.c b/fetch-pack.c index 0bf7ed7e47..1a6242cd71 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -1912,16 +1912,15 @@ static void update_shallow(struct fetch_pack_args *args, oid_array_clear(&ref); } -static int iterate_ref_map(void *cb_data, struct object_id *oid) +static struct object_id *iterate_ref_map(void *cb_data) { struct ref **rm = cb_data; struct ref *ref = *rm; if (!ref) - return -1; /* end of the list */ + return NULL; *rm = ref->next; - oidcpy(oid, &ref->old_oid); - return 0; + return &ref->old_oid; } struct ref *fetch_pack(struct fetch_pack_args *args,