From vladimir.levijev at gmail.com  Wed Jan 24 14:28:11 2018
From: vladimir.levijev at gmail.com (Vladimir Levijev)
Date: Wed, 24 Jan 2018 16:28:11 +0200
Subject: [ldns-users] Is ldns_resolver_query() thread-safe?
Message-ID: <CAAn0BQardXAPPfUTQ5vmBAyJz5sdqscuop_ZwkJPQQ0G8dekkA@mail.gmail.com>

Hi,

I couldn't get this information from the web site, so asking here. Is
libldns thread-safe? In other words, can I create a program in which I
would call ldns_resolver_query() in parallel in separate POSIX
threads?

Cheers,

VL


From willem at nlnetlabs.nl  Thu Jan 25 09:12:02 2018
From: willem at nlnetlabs.nl (Willem Toorop)
Date: Thu, 25 Jan 2018 10:12:02 +0100
Subject: [ldns-users] Is ldns_resolver_query() thread-safe?
In-Reply-To: <CAAn0BQardXAPPfUTQ5vmBAyJz5sdqscuop_ZwkJPQQ0G8dekkA@mail.gmail.com>
References: <CAAn0BQardXAPPfUTQ5vmBAyJz5sdqscuop_ZwkJPQQ0G8dekkA@mail.gmail.com>
Message-ID: <9fcfc31d-31a4-8b85-9d0a-a965a79fa1c5@nlnetlabs.nl>

Hi Vladimir,

ldns is thread safe (because it doesn't use any non constant global
variables), but ldns used OpenSSL for it's DNSSEC operations.  OpenSSL
can be used thread safe when you take some safety precautions, see:

	https://www.openssl.org/docs/man1.0.2/crypto/threads.html

Cheers,
-- Willem

Op 24-01-18 om 15:28 schreef Vladimir Levijev:
> Hi,
> 
> I couldn't get this information from the web site, so asking here. Is
> libldns thread-safe? In other words, can I create a program in which I
> would call ldns_resolver_query() in parallel in separate POSIX
> threads?
> 
> Cheers,
> 
> VL
> _______________________________________________
> ldns-users mailing list
> ldns-users at nlnetlabs.nl
> https://open.nlnetlabs.nl/mailman/listinfo/ldns-users
> 



From vladimir.levijev at gmail.com  Thu Jan 25 10:18:17 2018
From: vladimir.levijev at gmail.com (Vladimir Levijev)
Date: Thu, 25 Jan 2018 12:18:17 +0200
Subject: [ldns-users] Is ldns_resolver_query() thread-safe?
In-Reply-To: <9fcfc31d-31a4-8b85-9d0a-a965a79fa1c5@nlnetlabs.nl>
References: <CAAn0BQardXAPPfUTQ5vmBAyJz5sdqscuop_ZwkJPQQ0G8dekkA@mail.gmail.com>
 <9fcfc31d-31a4-8b85-9d0a-a965a79fa1c5@nlnetlabs.nl>
Message-ID: <CAAn0BQZSSR_Qf8QfPzt1h8=trWoBMJeLEbjonLenGyixkKVeQw@mail.gmail.com>

On Thu, Jan 25, 2018 at 11:12 AM, Willem Toorop <willem at nlnetlabs.nl> wrote:

Hi Willem,

> ldns is thread safe (because it doesn't use any non constant global
> variables), but ldns used OpenSSL for it's DNSSEC operations.  OpenSSL
> can be used thread safe when you take some safety precautions, see:
>
>         https://www.openssl.org/docs/man1.0.2/crypto/threads.html

Thanks a lot!

Cheers,

VL