update

Author: Cuda-Chen

virtio-snd.c

@@ -314,6 +314,12 @@ static pthread_mutex_t virtio_snd_mutex = PTHREAD_MUTEX_INITIALIZER;
 static pthread_cond_t virtio_snd_tx_cond = PTHREAD_COND_INITIALIZER;
 static int tx_ev_notify;
 
+/* vsnd virtq callback type */
+typedef int (*vsnd_virtq_cb)(virtio_snd_state_t *, /* vsnd state */
+                   const virtio_snd_queue_t *, /* vsnd queue */
+                   uint32_t, /* descriptor index */
+                   uint32_t * /* response length */);
+
 /* Forward declaration */
 static int virtio_snd_pa_cb(const void *input,
                             void *output,
@@ -324,17 +330,15 @@ static int virtio_snd_pa_cb(const void *input,
 static void virtio_queue_notify_handler(
     virtio_snd_state_t *vsnd,
     int index,
-    int (*handler)(virtio_snd_state_t *,
-                   const virtio_snd_queue_t *,
-                   uint32_t,
-                   uint32_t *));
+    vsnd_virtq_cb cb);
 static void __virtio_snd_frame_enqueue(void *payload,
                                        uint32_t n,
                                        uint32_t stream_id);
 typedef struct {
     struct virtq_desc vq_desc;
     struct list_head q;
 } virtq_desc_queue_node_t;
+
 #define VSND_GEN_TX_QUEUE_HANDLER(NAME_SUFFIX, WRITE)                   \
     static int virtio_snd_tx_desc_##NAME_SUFFIX##_handler(              \
         virtio_snd_state_t *vsnd, const virtio_snd_queue_t *queue,      \