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From: Vladislav Shpilevoy via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: tml <tarantool-patches@dev.tarantool.org>
Subject: Re: [Tarantool-patches] [PATCH v3 00/10] fix say_x format and rework fibers
Date: Thu, 13 May 2021 13:17:15 +0200
Message-ID: <8da1ce85-e510-9d27-95b1-b07c14dacf4a@tarantool.org> (raw)
In-Reply-To: <YJzgfFQ2f0dL+tJp@grain>

On 13.05.2021 10:17, Cyrill Gorcunov wrote:
> On Wed, May 12, 2021 at 08:41:42PM +0200, Vladislav Shpilevoy wrote:
>>>
>>> static int
>>> lbox_fiber_top_entry(struct fiber *f, void *cb_ctx)
>>> {
>>> 	struct lua_State *L = (struct lua_State *) cb_ctx;
>>>
>>> -->	lua_pushfstring(L, "%f/%s", (lua_Number)f->fid, f->name);
>>>
>>> why do we use float formate here at all?!
>>
>> Because lua_pushfstring() does not support %llu.
> 
> What about the idea below? float is 4 byte len and won't cover the
> 8 byte integer so we will have a rounding error.

Looks good. But also this is strange how did it work before? lua_Number
is double, if I am not mistaken. Which means it should have %lf format,
and it should be fine for all the reachable fiber IDs.

Anyway, the solution below looks good too.

> ---
> [cyrill@grain tarantool.git] git diff
> diff --git a/src/lua/fiber.c b/src/lua/fiber.c
> index 02ec3d158..753b9aa16 100644
> --- a/src/lua/fiber.c
> +++ b/src/lua/fiber.c
> @@ -337,7 +337,10 @@ lbox_fiber_top_entry(struct fiber *f, void *cb_ctx)
>  {
>         struct lua_State *L = (struct lua_State *) cb_ctx;
>  
> -       lua_pushfstring(L, "%f/%s", (lua_Number)f->fid, f->name);
> +       char sbuf[FIBER_NAME_MAX + 32];
> +       snprintf(sbuf, sizeof(sbuf), "%llu/%s",
> +                (long long)f->fid, f->name);
> +       lua_pushstring(L, sbuf);
>  
>         lua_newtable(L);
>  
> 

  reply	other threads:[~2021-05-13 11:17 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-04 15:58 Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 01/10] fiber: use uint64_t for fiber IDs Cyrill Gorcunov via Tarantool-patches
2021-05-10 18:40   ` Vladislav Shpilevoy via Tarantool-patches
2021-05-10 21:40     ` Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 02/10] popen: fix say_x format arguments Cyrill Gorcunov via Tarantool-patches
2021-05-10 18:40   ` Vladislav Shpilevoy via Tarantool-patches
2021-05-10 21:41     ` Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 03/10] raft: fix say_x arguments Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 04/10] box/error: fix argument for CustomError Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 05/10] xlog: fix say_x format Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 06/10] box/vynil: " Cyrill Gorcunov via Tarantool-patches
2021-05-10 18:40   ` Vladislav Shpilevoy via Tarantool-patches
2021-05-10 21:51     ` Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 07/10] txn: " Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 08/10] limbo: " Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 09/10] wal: " Cyrill Gorcunov via Tarantool-patches
2021-05-10 18:40   ` Vladislav Shpilevoy via Tarantool-patches
2021-05-10 21:55     ` Cyrill Gorcunov via Tarantool-patches
2021-05-04 15:58 ` [Tarantool-patches] [PATCH v3 10/10] say: fix CFORMAT specification Cyrill Gorcunov via Tarantool-patches
2021-05-10 18:40   ` Vladislav Shpilevoy via Tarantool-patches
2021-05-10 21:58     ` Cyrill Gorcunov via Tarantool-patches
2021-05-11 20:13 ` [Tarantool-patches] [PATCH v3 00/10] fix say_x format and rework fibers Vladislav Shpilevoy via Tarantool-patches
2021-05-11 21:15   ` Cyrill Gorcunov via Tarantool-patches
2021-05-11 21:24     ` Cyrill Gorcunov via Tarantool-patches
2021-05-12 18:41       ` Vladislav Shpilevoy via Tarantool-patches
2021-05-13  8:17         ` Cyrill Gorcunov via Tarantool-patches
2021-05-13 11:17           ` Vladislav Shpilevoy via Tarantool-patches [this message]
2021-05-13 11:44             ` Cyrill Gorcunov via Tarantool-patches
2021-05-13 12:09               ` Vladislav Shpilevoy via Tarantool-patches
2021-05-14  7:56 ` Kirill Yukhin via Tarantool-patches

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