Re: [RFC PATCH v2 01/25] main-loop.h: introduce qemu_in_main_thread()

[Stefan Hajnoczi]

On Tue, Oct 05, 2021 at 10:31:51AM -0400, Emanuele Giuseppe Esposito wrote:
> When invoked from the main loop, this function is the same
> as qemu_mutex_iothread_locked, and returns true if the BQL is held.
> When invoked from iothreads or tests, it returns true only
> if the current AioContext is the Main Loop.
> 
> This essentially just extends qemu_mutex_iothread_locked to work
> also in unit tests or other users like storage-daemon, that run
> in the Main Loop but end up using the implementation in
> stubs/iothread-lock.c.
> 
> Using qemu_mutex_iothread_locked in unit tests defaults to false
> because they use the implementation in stubs/iothread-lock,
> making all assertions added in next patches fail despite the
> AioContext is still the main loop.
> 
> Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
> ---
>  include/qemu/main-loop.h | 13 +++++++++++++
>  softmmu/cpus.c           |  5 +++++
>  stubs/iothread-lock.c    |  5 +++++
>  3 files changed, 23 insertions(+)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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