From: Vladislav Shpilevoy <v.shpilevoy@tarantool.org> To: Serge Petrenko <sergepetrenko@tarantool.org>, cyrillos@gmail.com Cc: tarantool-patches@dev.tarantool.org Subject: Re: [Tarantool-patches] [PATCH 1/4] box: add a single execution guard to clear_synchro_queue Date: Thu, 17 Dec 2020 22:43:20 +0100 [thread overview] Message-ID: <3d0aa43b-bd36-12b3-2abd-754468f2a301@tarantool.org> (raw) In-Reply-To: <7c1516165eee62eb534cc5080971223e1edc3ca8.1607633488.git.sergepetrenko@tarantool.org> Hi! Thanks for the patch! Looks fine. Only 2 notes below. > diff --git a/src/box/box.cc b/src/box/box.cc > index a8bc3471d..8e0c9a160 100644 > --- a/src/box/box.cc > +++ b/src/box/box.cc > @@ -1001,15 +1001,25 @@ box_set_replication_anon(void) > > } > > -void > +int > box_clear_synchro_queue(bool try_wait) > { > + /* A guard to block multiple simultaneous function invocations. */ > + static bool in_clear_synchro_queue = false; > + if (in_clear_synchro_queue) { > + diag_set(ClientError, ER_UNSUPPORTED, "clear_synchro_queue", > + "simultaneous invocations"); > + return -1; > + } > if (!is_box_configured || txn_limbo_is_empty(&txn_limbo)) > - return; > + return 0; > uint32_t former_leader_id = txn_limbo.owner_id; > assert(former_leader_id != REPLICA_ID_NIL); > if (former_leader_id == instance_id) > - return; > + return 0; > + > + in_clear_synchro_queue = true; > + auto guard = make_scoped_guard([&] { in_clear_synchro_queue = false; }); I would better not use C++ here, because guards were introduced only for protection against exceptions. But I don't mind having this guard here if you want it. Only my thoughts. > if (try_wait) { > /* Wait until pending confirmations/rollbacks reach us. */ > diff --git a/src/box/lua/ctl.c b/src/box/lua/ctl.c > index bf26465e6..a3447f3e7 100644 > --- a/src/box/lua/ctl.c > +++ b/src/box/lua/ctl.c > @@ -81,8 +81,8 @@ lbox_ctl_on_schema_init(struct lua_State *L) > static int > lbox_ctl_clear_synchro_queue(struct lua_State *L) > { > - (void) L; > - box_clear_synchro_queue(true); > + if (box_clear_synchro_queue(true) != 0) > + return luaT_error(L); Maybe better use nil + error object return way? I thought we still use it in the new code.
next prev parent reply other threads:[~2020-12-17 21:43 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-12-10 20:55 [Tarantool-patches] [PATCH 0/4] make clear_synchro_queue commit everything Serge Petrenko 2020-12-10 20:55 ` [Tarantool-patches] [PATCH 1/4] box: add a single execution guard to clear_synchro_queue Serge Petrenko 2020-12-17 21:43 ` Vladislav Shpilevoy [this message] 2020-12-21 10:18 ` Serge Petrenko 2020-12-21 17:11 ` Vladislav Shpilevoy 2020-12-23 12:01 ` Serge Petrenko 2020-12-10 20:55 ` [Tarantool-patches] [PATCH 2/4] relay: rename is_raft_enabled message to relay_is_running Serge Petrenko 2020-12-17 21:43 ` Vladislav Shpilevoy 2020-12-23 12:01 ` Serge Petrenko 2020-12-10 20:55 ` [Tarantool-patches] [PATCH 3/4] relay: introduce relay_lsn_watcher Serge Petrenko 2020-12-17 21:43 ` Vladislav Shpilevoy [not found] ` <4b7f4fc1-6d48-4332-c432-1eeb0b28c016@tarantool.org> 2020-12-23 12:03 ` Serge Petrenko 2020-12-10 20:55 ` [Tarantool-patches] [PATCH 4/4] box: rework clear_synchro_queue to commit everything Serge Petrenko 2020-12-17 21:43 ` Vladislav Shpilevoy 2020-12-23 12:04 ` Serge Petrenko 2020-12-11 7:15 ` [Tarantool-patches] [PATCH 0/4] make clear_synchro_queue " Serge Petrenko 2020-12-11 9:19 ` Serge Petrenko
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