[Spice-devel] [spice-gtk Win32 v5 13/22] Introduce SpiceUsbDeviceInfo to be kept instead of a libusb_device

[Marc-André Lureau]

I am missing why it has to be named "SpiceUsbDeviceInfo" and not
simply "SpiceUsbDevice". Any idea?

(misc style, extra parenthesis unneeded)

On Mon, Jul 9, 2012 at 2:14 PM, Uri Lublin <uril at redhat.com> wrote:
> For Windows, it's better not to keep references for libusb_devices
> that are not used.
> So instead of makeing SpiceUsbDevice a box for a libusb_device
> it is going to be a box for a SpiceUsbDeviceInfo.
> ---
>  gtk/usb-device-manager.c |  131 ++++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 131 insertions(+), 0 deletions(-)
>
> diff --git a/gtk/usb-device-manager.c b/gtk/usb-device-manager.c
> index f77d09a..d4e947a 100644
> --- a/gtk/usb-device-manager.c
> +++ b/gtk/usb-device-manager.c
> @@ -102,6 +102,16 @@ struct _SpiceUsbDeviceManagerPrivate {
>  };
>
>  #ifdef USE_USBREDIR
> +
> +typedef struct _SpiceUsbDeviceInfo {
> +    guint8  busnum;
> +    guint8  devaddr;
> +    guint16 vid;
> +    guint16 pid;
> +    gint    ref;
> +} SpiceUsbDeviceInfo;
> +
> +
>  static void channel_new(SpiceSession *session, SpiceChannel *channel,
>                          gpointer user_data);
>  static void channel_destroy(SpiceSession *session, SpiceChannel *channel,
> @@ -113,6 +123,12 @@ static void spice_usb_device_manager_uevent_cb(GUdevClient     *client,
>  static void spice_usb_device_manager_add_dev(SpiceUsbDeviceManager  *self,
>                                               GUdevDevice            *udev);
>
> +static SpiceUsbDeviceInfo *spice_usb_device_new(libusb_device *libdev);
> +static SpiceUsbDevice *spice_usb_device_ref(SpiceUsbDevice *device);
> +static void spice_usb_device_unref(SpiceUsbDevice *device);
> +
> +static gboolean spice_usb_device_equal_libdev(SpiceUsbDevice *device,
> +                                              libusb_device *libdev);
>  G_DEFINE_BOXED_TYPE(SpiceUsbDevice, spice_usb_device,
>                      (GBoxedCopyFunc)libusb_ref_device,
>                      (GBoxedFreeFunc)libusb_unref_device)
> @@ -1087,3 +1103,118 @@ gchar *spice_usb_device_get_description(SpiceUsbDevice *_device, const gchar *fo
>      return NULL;
>  #endif
>  }
> +
> +
> +
> +#ifdef USE_USBREDIR
> +/*
> + * SpiceUsbDeviceInfo
> + */
> +static SpiceUsbDeviceInfo *spice_usb_device_new(libusb_device *libdev)
> +{
> +    SpiceUsbDeviceInfo *info;
> +    struct libusb_device_descriptor desc;
> +    int errcode;
> +    const gchar *errstr;
> +    guint8 bus, addr;
> +
> +    g_return_val_if_fail(libdev != NULL, NULL);
> +
> +    bus = libusb_get_bus_number(libdev);
> +    addr = libusb_get_device_address(libdev);
> +
> +    errcode = libusb_get_device_descriptor(libdev, &desc);
> +    if (errcode < 0) {
> +        errstr = spice_usbutil_libusb_strerror(errcode);
> +        g_warning("cannot get device descriptor for (%p) %d.%d -- %s(%d)",
> +                  libdev, bus, addr, errstr, errcode);
> +        return NULL;
> +    }
> +
> +    info = g_new0(SpiceUsbDeviceInfo, 1);
> +
> +    info->busnum  = bus;
> +    info->devaddr = addr;
> +    info->vid = desc.idVendor;
> +    info->pid = desc.idProduct;
> +    info->ref = 1;
> +
> +    return info;
> +}
> +
> +guint8 spice_usb_device_get_busnum(SpiceUsbDevice *device)
> +{
> +    SpiceUsbDeviceInfo *info = (SpiceUsbDeviceInfo *)device;
> +
> +    g_return_val_if_fail(info != NULL, 0);
> +
> +    return info->busnum;
> +}
> +
> +guint8 spice_usb_device_get_devaddr(SpiceUsbDevice *device)
> +{
> +    SpiceUsbDeviceInfo *info = (SpiceUsbDeviceInfo *)device;
> +
> +    g_return_val_if_fail(info != NULL, 0);
> +
> +    return info->devaddr;
> +}
> +
> +guint16 spice_usb_device_get_vid(SpiceUsbDevice *device)
> +{
> +    SpiceUsbDeviceInfo *info = (SpiceUsbDeviceInfo *)device;
> +
> +    g_return_val_if_fail(info != NULL, 0);
> +
> +    return info->vid;
> +}
> +
> +guint16 spice_usb_device_get_pid(SpiceUsbDevice *device)
> +{
> +    SpiceUsbDeviceInfo *info = (SpiceUsbDeviceInfo *)device;
> +
> +    g_return_val_if_fail(info != NULL, 0);
> +
> +    return info->pid;
> +}
> +
> +static SpiceUsbDevice *spice_usb_device_ref(SpiceUsbDevice *device)
> +{
> +    SpiceUsbDeviceInfo *info = (SpiceUsbDeviceInfo *)device;
> +
> +    g_return_val_if_fail(info != NULL, NULL);
> +    g_atomic_int_inc(&info->ref);
> +    return device;
> +}
> +
> +static void spice_usb_device_unref(SpiceUsbDevice *device)
> +{
> +    gboolean ref_count_is_0;
> +
> +    SpiceUsbDeviceInfo *info = (SpiceUsbDeviceInfo *)device;
> +
> +    g_return_if_fail(info != NULL);
> +
> +    ref_count_is_0 = g_atomic_int_dec_and_test(&info->ref);
> +    if (ref_count_is_0) {
> +        g_free(info);
> +    }
> +}
> +
> +static gboolean
> +spice_usb_device_equal_libdev(SpiceUsbDevice *device,
> +                              libusb_device  *libdev)
> +{
> +    guint8 addr1, addr2, bus1, bus2;
> +
> +    if ((device == NULL) || (libdev == NULL))
> +        return FALSE;
> +
> +    bus1  = spice_usb_device_get_busnum(device);
> +    addr1 = spice_usb_device_get_devaddr(device);
> +    bus2  = libusb_get_bus_number(libdev);
> +    addr2 = libusb_get_device_address(libdev);
> +
> +    return ((bus1 == bus2) && (addr1 == addr2));
> +}
> +#endif /* USE_USBREDIR */
> --
> 1.7.1
>
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-- 
Marc-André Lureau