Re: [libgpiod] Thread safety API contract

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Wed, Sep 13, 2023 at 3:36 PM Erik Schilling
<erik.schilling@xxxxxxxxxx> wrote:
>
> On Wed Sep 13, 2023 at 2:03 PM CEST, Bartosz Golaszewski wrote:
> > On Wed, Sep 13, 2023 at 11:47 AM Erik Schilling
> > <erik.schilling@xxxxxxxxxx> wrote:
> > >
> > > Hi all!
> > >
> > > Currently it looks like libgpiod does not document any kind of thread
> > > safety gurantee. However, the Python bindings tests
> >
> > Indeed, the library is thread-aware but not thread-safe. Just like
> > what is recommended for low-level system libraries.
>
> Just to confirm:
>
> I assume this means: thread-aware in the sense that all created objects
> (chips, line_requests, ...) together may only be used by a single thread
> at once? So line_requests of a same chip may not be used across threads?
>

They can be used across threads alright. Thread-aware means: no global
state in the library, IOW two functions won't get in each other's way
unless they work on the same object.

Bart