[Qemu-devel] Re: [PATCH 02/15] Refactor cpu_has_work/any_cpu_has_work in cpus.c

[Marcelo Tosatti <mtosatti@redhat.com>]

On Mon, Feb 07, 2011 at 12:19:13PM +0100, Jan Kiszka wrote:
> Avoid duplicate use of the function name cpu_has_work, it's confusing.
> Refactor cpu_has_work to cpu_is_idle and do the same with
> any_cpu_has_work.
> 
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
>  cpus.c |   43 +++++++++++++++++++++++--------------------
>  1 files changed, 23 insertions(+), 20 deletions(-)
> 
> diff --git a/cpus.c b/cpus.c
> index d54ec7d..cd764f2 100644
> --- a/cpus.c
> +++ b/cpus.c
> @@ -137,29 +137,30 @@ static int cpu_can_run(CPUState *env)
>      return 1;
>  }
>  
> -static int cpu_has_work(CPUState *env)
> +static bool cpu_is_idle(CPUState *env)
>  {
> -    if (env->stop)
> -        return 1;
> -    if (env->queued_work_first)
> -        return 1;
> -    if (env->stopped || !vm_running)
> -        return 0;
> -    if (!env->halted)
> -        return 1;
> -    if (qemu_cpu_has_work(env))
> -        return 1;
> -    return 0;
> +    if (env->stop || env->queued_work_first) {
> +        return false;
> +    }
> +    if (env->stopped || !vm_running) {
> +        return true;
> +    }
> +    if (!env->halted || qemu_cpu_has_work(env)) {
> +        return false;
> +    }
> +    return true;
>  }

Do you really find it easier to read evaluations grouped with || ? I
don't.

Sorry but the name change does not feel right either: CPU is still idle
if the vm is not running.