Re: [Qemu-devel] [PATCH RFC v2 1/9] hw/core: Add interface to allocate and free a single IRQ

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Oct 02, 2013 at 03:41:26PM +0300, Marcel Apfelbaum wrote:
> qemu_allocate_irq returns a single qemu_irq.
> The interface allows to specify an interrupt number.
> 
> qemu_free_irq frees it.
> 
> Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
> ---
>  hw/core/irq.c    | 16 ++++++++++++++++
>  include/hw/irq.h |  7 +++++++
>  2 files changed, 23 insertions(+)
> 
> diff --git a/hw/core/irq.c b/hw/core/irq.c
> index 2078542..03c8cb3 100644
> --- a/hw/core/irq.c
> +++ b/hw/core/irq.c
> @@ -68,6 +68,17 @@ qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
>      return qemu_extend_irqs(NULL, 0, handler, opaque, n);
>  }
>  
> +qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n)
> +{
> +    struct IRQState *irq;
> +
> +    irq = g_new(struct IRQState, 1);
> +    irq->handler = handler;
> +    irq->opaque = opaque;
> +    irq->n = n;
> +
> +    return irq;
> +}
>  
>  void qemu_free_irqs(qemu_irq *s)
>  {
> @@ -75,6 +86,11 @@ void qemu_free_irqs(qemu_irq *s)
>      g_free(s);
>  }
>  
> +void qemu_free_irq(qemu_irq irq)
> +{
> +    g_free(irq);
> +}
> +
>  static void qemu_notirq(void *opaque, int line, int level)
>  {
>      struct IRQState *irq = opaque;
> diff --git a/include/hw/irq.h b/include/hw/irq.h
> index 610e6b7..f560dea 100644
> --- a/include/hw/irq.h
> +++ b/include/hw/irq.h
> @@ -30,6 +30,12 @@ static inline void qemu_irq_pulse(qemu_irq irq)
>   */
>  qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
>  
> +/*
> + * Allocates a single IRQ. The irq is assigned with a handler, an opaque
> + * data and the interrupt number

Add period at end of line :)
no need to repost for this.

> + */
> +qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
> +
>  /* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
>   * preserved. New IRQs are assigned the argument handler and opaque data.
>   */
> @@ -37,6 +43,7 @@ qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
>                                  void *opaque, int n);
>  
>  void qemu_free_irqs(qemu_irq *s);
> +void qemu_free_irq(qemu_irq irq);
>  
>  /* Returns a new IRQ with opposite polarity.  */
>  qemu_irq qemu_irq_invert(qemu_irq irq);
> -- 
> 1.8.3.1