On Mon, Apr 22, 2019 at 12:33:07PM +0530, Aravinda Prasad wrote: > Introduce a wrapper function to wait on condition for > the main loop mutex. This function atomically releases > the main loop mutex and causes the calling thread to > block on the condition. This wrapper is required because > qemu_global_mutex is a static variable. > > Signed-off-by: Aravinda Prasad <aravi...@linux.vnet.ibm.com>
Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
> ---
> cpus.c | 5 +++++
> include/qemu/main-loop.h | 8 ++++++++
> 2 files changed, 13 insertions(+)
>
> diff --git a/cpus.c b/cpus.c
> index e83f72b..d9379e7 100644
> --- a/cpus.c
> +++ b/cpus.c
> @@ -1858,6 +1858,11 @@ void qemu_mutex_unlock_iothread(void)
> qemu_mutex_unlock(&qemu_global_mutex);
> }
>
> +void qemu_cond_wait_iothread(QemuCond *cond)
> +{
> + qemu_cond_wait(cond, &qemu_global_mutex);
> +}
> +
> static bool all_vcpus_paused(void)
> {
> CPUState *cpu;
> diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
> index f6ba78e..a6d20b0 100644
> --- a/include/qemu/main-loop.h
> +++ b/include/qemu/main-loop.h
> @@ -295,6 +295,14 @@ void qemu_mutex_lock_iothread_impl(const char *file, int
> line);
> */
> void qemu_mutex_unlock_iothread(void);
>
> +/*
> + * qemu_cond_wait_iothread: Wait on condition for the main loop mutex
> + *
> + * This function atomically releases the main loop mutex and causes
> + * the calling thread to block on the condition.
> + */
> +void qemu_cond_wait_iothread(QemuCond *cond);
> +
> /* internal interfaces */
>
> void qemu_fd_register(int fd);
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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