Re: [PATCH 7/9] char-device: add 'self' param to vfuncs

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On Mon, 2016-10-31 at 12:59 -0400, Frediano Ziglio wrote:
> > 
> > 
> > Add a 'self' parameter to all of the char device virtual functions
> > so
> > that we don't have to play games with the 'opaque' pointer.
> 
> From the patch looks like the opaque parameter can be removed.

Unfortunately, I don't think it can be removed at the moment, since
spicevmc uses a different object for its 'opaque' argument. I'll try to
see if I can refactor this further to get rid of the ugly 'opaque'
stuff.



> 
> > 
> > ---
> >  server/char-device.c |  8 ++++----
> >  server/char-device.h | 13 +++++++++----
> >  server/reds.c        | 17 ++++++++++++-----
> >  server/smartcard.c   | 29 ++++++++++++++++-------------
> >  server/spicevmc.c    | 12 ++++++++----
> >  5 files changed, 49 insertions(+), 30 deletions(-)
> > 
> > diff --git a/server/char-device.c b/server/char-device.c
> > index 7775c07..8ed1a2a 100644
> > --- a/server/char-device.c
> > +++ b/server/char-device.c
> > @@ -99,7 +99,7 @@
> > red_char_device_read_one_msg_from_device(RedCharDevice
> > *dev)
> >  {
> >     RedCharDeviceClass *klass = RED_CHAR_DEVICE_GET_CLASS(dev);
> >  
> > -   return klass->read_one_msg_from_device(dev->priv->sin,
> > dev->priv->opaque);
> > +   return klass->read_one_msg_from_device(dev, dev->priv->sin,
> > dev->priv->opaque);
> >  }
> >  
> >  static void
> > @@ -109,7 +109,7 @@
> > red_char_device_send_msg_to_client(RedCharDevice *dev,
> >  {
> >     RedCharDeviceClass *klass = RED_CHAR_DEVICE_GET_CLASS(dev);
> >  
> > -   klass->send_msg_to_client(msg, client, dev->priv->opaque);
> > +   klass->send_msg_to_client(dev, msg, client, dev->priv->opaque);
> >  }
> >  
> >  static void
> > @@ -119,7 +119,7 @@
> > red_char_device_send_tokens_to_client(RedCharDevice *dev,
> >  {
> >     RedCharDeviceClass *klass = RED_CHAR_DEVICE_GET_CLASS(dev);
> >  
> > -   klass->send_tokens_to_client(client, tokens, dev->priv-
> > >opaque);
> > +   klass->send_tokens_to_client(dev, client, tokens, dev->priv-
> > >opaque);
> >  }
> >  
> >  static void
> > @@ -137,7 +137,7 @@ red_char_device_remove_client(RedCharDevice
> > *dev,
> > RedClient *client)
> >  {
> >     RedCharDeviceClass *klass = RED_CHAR_DEVICE_GET_CLASS(dev);
> >  
> > -   klass->remove_client(client, dev->priv->opaque);
> > +   klass->remove_client(dev, client, dev->priv->opaque);
> >  }
> >  
> >  static void
> > red_char_device_write_buffer_free(RedCharDeviceWriteBuffer *buf)
> > diff --git a/server/char-device.h b/server/char-device.h
> > index 44e9504..14cbe94 100644
> > --- a/server/char-device.h
> > +++ b/server/char-device.h
> > @@ -56,16 +56,21 @@ struct RedCharDeviceClass
> >  
> >      /* reads from the device till reaching a msg that should be
> > sent to the
> >      client,
> >       * or till the reading fails */
> > -    RedPipeItem*
> > (*read_one_msg_from_device)(SpiceCharDeviceInstance *sin,
> > +    RedPipeItem* (*read_one_msg_from_device)(RedCharDevice *self,
> > +                                             SpiceCharDeviceInstan
> > ce *sin,
> >                                               void *opaque);
> >      /* after this call, the message is unreferenced */
> > -    void (*send_msg_to_client)(RedPipeItem *msg,
> > +    void (*send_msg_to_client)(RedCharDevice *self,
> > +                               RedPipeItem *msg,
> >                                 RedClient *client,
> >                                 void *opaque);
> >  
> >      /* The cb is called when a predefined number of write buffers
> > were
> >      consumed by the
> >       * device */
> > -    void (*send_tokens_to_client)(RedClient *client, uint32_t
> > tokens, void
> > *opaque);
> > +    void (*send_tokens_to_client)(RedCharDevice *self,
> > +                                  RedClient *client,
> > +                                  uint32_t tokens,
> > +                                  void *opaque);
> >  
> >      /* The cb is called when a server (self) message that was
> > addressed to
> >      the device,
> >       * has been completely written to it */
> > @@ -74,7 +79,7 @@ struct RedCharDeviceClass
> >      /* This cb is called if it is recommended to remove the client
> >       * due to slow flow or due to some other error.
> >       * The called instance should disconnect the client, or at
> > least the
> >       corresponding channel */
> > -    void (*remove_client)(RedClient *client, void *opaque);
> > +    void (*remove_client)(RedCharDevice *self, RedClient *client,
> > void
> > *opaque);
> >  };
> >  
> >  GType red_char_device_get_type(void) G_GNUC_CONST;
> > diff --git a/server/reds.c b/server/reds.c
> > index 9034197..0d9cef7 100644
> > --- a/server/reds.c
> > +++ b/server/reds.c
> > @@ -823,11 +823,12 @@ static void
> > vdi_port_read_buf_free(RedPipeItem *base)
> >  
> >  /* reads from the device till completes reading a message that is
> > addressed
> >  to the client,
> >   * or otherwise, when reading from the device fails */
> > -static RedPipeItem
> > *vdi_port_read_one_msg_from_device(SpiceCharDeviceInstance *sin,
> > +static RedPipeItem
> > *vdi_port_read_one_msg_from_device(RedCharDevice *self,
> > +
> > SpiceCharDeviceInstance
> > *sin,
> >                                                        void
> > *opaque)
> >  {
> >      RedsState *reds;
> > -    RedCharDeviceVDIPort *dev = RED_CHAR_DEVICE_VDIPORT(sin->st);
> > +    RedCharDeviceVDIPort *dev = RED_CHAR_DEVICE_VDIPORT(self);
> >      SpiceCharDeviceInterface *sif;
> >      RedVDIReadBuf *dispatch_buf;
> >      int n;
> > @@ -900,7 +901,8 @@ static RedPipeItem
> > *vdi_port_read_one_msg_from_device(SpiceCharDeviceInstance *s
> >  }
> >  
> >  /* after calling this, we unref the message, and the ref is in the
> > instance
> >  side */
> > -static void vdi_port_send_msg_to_client(RedPipeItem *msg,
> > +static void vdi_port_send_msg_to_client(RedCharDevice *self,
> > +                                        RedPipeItem *msg,
> >                                          RedClient *client,
> >                                          void *opaque)
> >  {
> > @@ -914,7 +916,10 @@ static void
> > vdi_port_send_msg_to_client(RedPipeItem
> > *msg,
> >                                          agent_data_buf);
> >  }
> >  
> > -static void vdi_port_send_tokens_to_client(RedClient *client,
> > uint32_t
> > tokens, void *opaque)
> > +static void vdi_port_send_tokens_to_client(RedCharDevice *self,
> > +                                           RedClient *client,
> > +                                           uint32_t tokens,
> > +                                           void *opaque)
> >  {
> >      main_channel_client_push_agent_tokens(red_client_get_main(clie
> > nt),
> >                                            tokens);
> > @@ -930,7 +935,9 @@ static void vdi_port_on_free_self_token(void
> > *opaque)
> >      }
> >  }
> >  
> > -static void vdi_port_remove_client(RedClient *client, void
> > *opaque)
> > +static void vdi_port_remove_client(RedCharDevice *self,
> > +                                   RedClient *client,
> > +                                   void *opaque)
> >  {
> >      red_channel_client_shutdown(RED_CHANNEL_CLIENT(red_client_get_
> > main(client)));
> >  }
> > diff --git a/server/smartcard.c b/server/smartcard.c
> > index b37abb2..ed083d8 100644
> > --- a/server/smartcard.c
> > +++ b/server/smartcard.c
> > @@ -149,10 +149,11 @@ static void
> > smartcard_read_buf_prepare(RedCharDeviceSmartcard *dev,
> > VSCMsgHeader
> >      }
> >  }
> >  
> > -static RedPipeItem
> > *smartcard_read_msg_from_device(SpiceCharDeviceInstance
> > *sin,
> > +static RedPipeItem *smartcard_read_msg_from_device(RedCharDevice
> > *self,
> > +                                                   SpiceCharDevice
> > Instance
> > *sin,
> >                                                     void *opaque)
> >  {
> > -    RedCharDeviceSmartcard *dev = opaque;
> > +    RedCharDeviceSmartcard *dev = RED_CHAR_DEVICE_SMARTCARD(self);
> >      SpiceCharDeviceInterface *sif =
> > spice_char_device_get_interface(sin);
> >      VSCMsgHeader *vheader = (VSCMsgHeader*)dev->priv->buf;
> >      int n;
> > @@ -186,11 +187,12 @@ static RedPipeItem
> > *smartcard_read_msg_from_device(SpiceCharDeviceInstance *sin,
> >      return NULL;
> >  }
> >  
> > -static void smartcard_send_msg_to_client(RedPipeItem *msg,
> > +static void smartcard_send_msg_to_client(RedCharDevice *self,
> > +                                         RedPipeItem *msg,
> >                                           RedClient *client,
> >                                           void *opaque)
> >  {
> > -    RedCharDeviceSmartcard *dev = opaque;
> > +    RedCharDeviceSmartcard *dev = RED_CHAR_DEVICE_SMARTCARD(self);
> >      RedChannelClient *rcc = RED_CHANNEL_CLIENT(dev->priv->scc);
> >  
> >      spice_assert(dev->priv->scc &&
> > @@ -199,14 +201,17 @@ static void
> > smartcard_send_msg_to_client(RedPipeItem
> > *msg,
> >      smartcard_channel_client_pipe_add_push(rcc, msg);
> >  }
> >  
> > -static void smartcard_send_tokens_to_client(RedClient *client,
> > uint32_t
> > tokens, void *opaque)
> > +static void smartcard_send_tokens_to_client(RedCharDevice *self,
> > +                                            RedClient *client,
> > +                                            uint32_t tokens,
> > +                                            void *opaque)
> >  {
> >      spice_error("not implemented");
> >  }
> >  
> > -static void smartcard_remove_client(RedClient *client, void
> > *opaque)
> > +static void smartcard_remove_client(RedCharDevice *self, RedClient
> > *client,
> > void *opaque)
> >  {
> > -    RedCharDeviceSmartcard *dev = opaque;
> > +    RedCharDeviceSmartcard *dev = RED_CHAR_DEVICE_SMARTCARD(self);
> >      RedChannelClient *rcc = RED_CHANNEL_CLIENT(dev->priv->scc);
> >  
> >      spice_printerr("smartcard  dev %p, client %p", dev, client);
> > @@ -247,7 +252,7 @@ RedMsgItem
> > *smartcard_char_device_on_message_from_device(RedCharDeviceSmartcar
> > d
> >  
> >  static int smartcard_char_device_add_to_readers(RedsState *reds,
> >  SpiceCharDeviceInstance *char_device)
> >  {
> > -    RedCharDeviceSmartcard *dev =
> > red_char_device_opaque_get(char_device->st);
> > +    RedCharDeviceSmartcard *dev =
> > RED_CHAR_DEVICE_SMARTCARD(char_device->st);
> >  
> >      if (g_smartcard_readers.num >= SMARTCARD_MAX_READERS) {
> >          return -1;
> > @@ -272,7 +277,7 @@ SpiceCharDeviceInstance
> > *smartcard_readers_get_unattached(void)
> >      RedCharDeviceSmartcard* dev;
> >  
> >      for (i = 0; i < g_smartcard_readers.num; ++i) {
> > -        dev =
> > red_char_device_opaque_get(g_smartcard_readers.sin[i]->st);
> > +        dev =
> > RED_CHAR_DEVICE_SMARTCARD(g_smartcard_readers.sin[i]->st);
> >          if (!dev->priv->scc) {
> >              return g_smartcard_readers.sin[i];
> >          }
> 
> These 2 hunks looks a bit OT.
> 
> > 
> > @@ -291,8 +296,6 @@ static RedCharDeviceSmartcard
> > *smartcard_device_new(RedsState *reds, SpiceCharDe
> >                              "self-tokens", ~0ULL,
> >                              NULL);
> >  
> > -    g_object_set(char_dev, "opaque", char_dev, NULL);
> > -
> >      return RED_CHAR_DEVICE_SMARTCARD(char_dev);
> >  }
> >  
> 
> Shouldn't the property be removed?
> 
> > 
> > @@ -336,7 +339,7 @@ void
> > smartcard_char_device_notify_reader_add(RedCharDeviceSmartcard
> > *dev)
> >  void smartcard_char_device_attach_client(SpiceCharDeviceInstance
> >  *char_device,
> >                                           SmartCardChannelClient
> > *scc)
> >  {
> > -    RedCharDeviceSmartcard *dev =
> > red_char_device_opaque_get(char_device->st);
> > +    RedCharDeviceSmartcard *dev =
> > RED_CHAR_DEVICE_SMARTCARD(char_device->st);
> >      int client_added;
> >  
> >      spice_assert(!smartcard_channel_client_get_char_device(scc) &&
> >      !dev->priv->scc);
> > @@ -499,7 +502,7 @@ void
> > smartcard_channel_write_to_reader(RedCharDeviceWriteBuffer
> > *write_buf)
> >  
> >      spice_assert(vheader->reader_id <= g_smartcard_readers.num);
> >      sin = g_smartcard_readers.sin[vheader->reader_id];
> > -    dev = (RedCharDeviceSmartcard
> > *)red_char_device_opaque_get(sin->st);
> > +    dev = RED_CHAR_DEVICE_SMARTCARD(sin->st);
> >      spice_assert(!dev->priv->scc ||
> >                   dev ==
> >                   smartcard_channel_client_get_device(dev->priv-
> > >scc));
> >      /* protocol requires messages to be in network endianess */
> > diff --git a/server/spicevmc.c b/server/spicevmc.c
> > index 8b5acf5..99e5b6e 100644
> > --- a/server/spicevmc.c
> > +++ b/server/spicevmc.c
> > @@ -357,7 +357,8 @@ static RedVmcPipeItem*
> > try_compress_lz4(RedVmcChannel
> > *state, int n, RedVmcPipeI
> >  }
> >  #endif
> >  
> > -static RedPipeItem
> > *spicevmc_chardev_read_msg_from_dev(SpiceCharDeviceInstance *sin,
> > +static RedPipeItem
> > *spicevmc_chardev_read_msg_from_dev(RedCharDevice *self,
> > +
> > SpiceCharDeviceInstance
> > *sin,
> >                                                         void
> > *opaque)
> >  {
> >      RedVmcChannel *state = opaque;
> > @@ -402,7 +403,8 @@ static RedPipeItem
> > *spicevmc_chardev_read_msg_from_dev(SpiceCharDeviceInstance *
> >      }
> >  }
> >  
> > -static void spicevmc_chardev_send_msg_to_client(RedPipeItem *msg,
> > +static void spicevmc_chardev_send_msg_to_client(RedCharDevice
> > *self,
> > +                                                RedPipeItem *msg,
> >                                                  RedClient *client,
> >                                                  void *opaque)
> >  {
> > @@ -440,14 +442,16 @@ static void
> > spicevmc_port_send_event(RedChannelClient
> > *rcc, uint8_t event)
> >      red_channel_client_pipe_add_push(rcc, &item->base);
> >  }
> >  
> > -static void spicevmc_char_dev_send_tokens_to_client(RedClient
> > *client,
> > +static void spicevmc_char_dev_send_tokens_to_client(RedCharDevice
> > *self,
> > +                                                    RedClient
> > *client,
> >                                                      uint32_t
> > tokens,
> >                                                      void *opaque)
> >  {
> >      spice_printerr("Not implemented!");
> >  }
> >  
> > -static void spicevmc_char_dev_remove_client(RedClient *client,
> > void *opaque)
> > +static void spicevmc_char_dev_remove_client(RedCharDevice *self,
> > +                                            RedClient *client,
> > void *opaque)
> >  {
> >      RedVmcChannel *state = opaque;
> >  
> 
> Frediano
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