Re: URCU feature request?

Ondřej Surý via lttng-dev <[email protected]> Tue, 2 Sep 2025 23:33:50 +0200
Newsgroups org.lttng.lists.lttng-dev
Message-ID <[email protected]>
If I understand you correctly, you can do something like this:

#undef rcu_read_lock
#define rcu_read_lock() urcu_memb_read_lock(); {

#undef rcu_read_unlock
#define rcu_read_lock() } urcu_memb_read_unlock();

(replace memb with your RCU variant of course)

and make your code declare all the RCU protected pointers inside the RCU =
critical section, e.g.

rcu_read_lock();
my_pointer *foo =3D rcu_dereference(...);

use(foo); /* valid */

rcu_read_unlock();


use(foo); /* invalid and caught by the compiler */

Ondrej
--
Ond=C5=99ej Sur=C3=BD (He/Him)
[email protected]

> On 2. 9. 2025, at 23:06, Thobias Knudsen via lttng-dev =
<[email protected]> wrote:
>=20
> Yes, that is what I'm worried about. For my case when using URCU that =
is my biggest concern, as the debug macro "library" I made checks =
everything else, if I haven't overlooked anything.
>=20