[06/13] vl.c: Provide accessor function serial_hd() for serial_hds[] array

Provide an accessor function serial_hd() to return the Chardev
(if any) associated with the numbered serial port. This will
be used to replace direct accesses to the serial_hds[] array,
so that calling code doesn't need to care about the size of
that array.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 include/sysemu/sysemu.h | 3 +++
 vl.c                    | 9 +++++++++
 2 files changed, 12 insertions(+)

On 04/20/2018 11:52 AM, Peter Maydell wrote:
> Provide an accessor function serial_hd() to return the Chardev
> (if any) associated with the numbered serial port. This will
> be used to replace direct accesses to the serial_hds[] array,
> so that calling code doesn't need to care about the size of
> that array.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> ---
>  include/sysemu/sysemu.h | 3 +++
>  vl.c                    | 9 +++++++++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 2b42151c63..bd5b55c514 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -163,6 +163,9 @@ void hmp_pcie_aer_inject_error(Monitor *mon, const QDict *qdict);
>  
>  extern Chardev *serial_hds[MAX_SERIAL_PORTS];
>  
> +/* Return the Chardev for serial port i, or NULL if none */
> +Chardev *serial_hd(int i);
> +
>  /* parallel ports */
>  
>  #define MAX_PARALLEL_PORTS 3
> diff --git a/vl.c b/vl.c
> index fce1fd12d8..6daf026da6 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2516,6 +2516,15 @@ static int serial_parse(const char *devname)
>      return 0;
>  }
>  
> +Chardev *serial_hd(int i)
> +{
> +    assert(i >= 0);
> +    if (i < ARRAY_SIZE(serial_hds)) {
> +        return serial_hds[i];
> +    }
> +    return NULL;
> +}
> +
>  static int parallel_parse(const char *devname)
>  {
>      static int index = 0;
>

On 20.04.2018 16:52, Peter Maydell wrote:
> Provide an accessor function serial_hd() to return the Chardev
> (if any) associated with the numbered serial port. This will
> be used to replace direct accesses to the serial_hds[] array,
> so that calling code doesn't need to care about the size of
> that array.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>  include/sysemu/sysemu.h | 3 +++
>  vl.c                    | 9 +++++++++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 2b42151c63..bd5b55c514 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -163,6 +163,9 @@ void hmp_pcie_aer_inject_error(Monitor *mon, const QDict *qdict);
>  
>  extern Chardev *serial_hds[MAX_SERIAL_PORTS];
>  
> +/* Return the Chardev for serial port i, or NULL if none */
> +Chardev *serial_hd(int i);
> +
>  /* parallel ports */
>  
>  #define MAX_PARALLEL_PORTS 3
> diff --git a/vl.c b/vl.c
> index fce1fd12d8..6daf026da6 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2516,6 +2516,15 @@ static int serial_parse(const char *devname)
>      return 0;
>  }
>  
> +Chardev *serial_hd(int i)
> +{
> +    assert(i >= 0);
> +    if (i < ARRAY_SIZE(serial_hds)) {
> +        return serial_hds[i];
> +    }
> +    return NULL;
> +}
> +
>  static int parallel_parse(const char *devname)
>  {
>      static int index = 0;
> 

Reviewed-by: Thomas Huth <thuth@redhat.com>