server: Return the data for callback results in the varargs part of the get_message request.

dlls/user/message.c

@@ -1989,8 +1989,12 @@ static BOOL peek_message( MSG *msg, HWND hwnd, UINT first, UINT last, int flags
             info.flags = ISMEX_CALLBACK;
             break;
         case MSG_CALLBACK_RESULT:
-            call_sendmsg_callback( (SENDASYNCPROC)info.msg.wParam, info.msg.hwnd,
+            if (size >= sizeof(struct callback_msg_data))
-                                   info.msg.message, extra_info, info.msg.lParam );
+            {
+                const struct callback_msg_data *data = (const struct callback_msg_data *)buffer;
+                call_sendmsg_callback( data->callback, info.msg.hwnd,
+                                       info.msg.message, data->data, data->result );
+            }
             goto next;
         case MSG_WINEVENT:
             if (size >= sizeof(struct winevent_msg_data))

include/wine/server_protocol.h

@@ -157,6 +157,14 @@ typedef struct
 } rectangle_t;
 
 
+
+struct callback_msg_data
+{
+    void           *callback;
+    unsigned long   data;
+    unsigned long   result;
+};
+
 struct winevent_msg_data
 {
     user_handle_t   hook;
@@ -168,6 +176,7 @@ struct winevent_msg_data
 typedef union
 {
     unsigned char            bytes[1];
+    struct callback_msg_data callback;
     struct winevent_msg_data winevent;
 } message_data_t;
 
@@ -4419,6 +4428,6 @@ union generic_reply
     struct query_symlink_reply query_symlink_reply;
 };
 
-#define SERVER_PROTOCOL_VERSION 248
+#define SERVER_PROTOCOL_VERSION 249
 
 #endif /* __WINE_WINE_SERVER_PROTOCOL_H */

server/protocol.def

@@ -173,6 +173,14 @@ typedef struct
 } rectangle_t;
 
 /* structures for extra message data */
+
+struct callback_msg_data
+{
+    void           *callback;   /* callback function */
+    unsigned long   data;       /* user data for callback */
+    unsigned long   result;     /* message result */
+};
+
 struct winevent_msg_data
 {
     user_handle_t   hook;       /* hook handle */
@@ -184,6 +192,7 @@ struct winevent_msg_data
 typedef union
 {
     unsigned char            bytes[1];   /* raw data for sent messages */
+    struct callback_msg_data callback;
     struct winevent_msg_data winevent;
 } message_data_t;
 
@@ -1637,9 +1646,9 @@ enum message_type
     int             type;      /* message type */
     user_handle_t   win;       /* window handle */
     unsigned int    msg;       /* message code */
-    unsigned long   wparam;    /* parameters (callback function for MSG_CALLBACK_RESULT) */
+    unsigned long   wparam;    /* parameters */
-    unsigned long   lparam;    /* parameters (result for MSG_CALLBACK_RESULT) */
+    unsigned long   lparam;    /* parameters */
-    unsigned long   info;      /* extra info (callback argument for MSG_CALLBACK_RESULT) */
+    unsigned long   info;      /* extra info */
     int             x;         /* x position */
     int             y;         /* y position */
     unsigned int    time;      /* message time */

server/queue.c

@@ -404,7 +404,11 @@ static void free_result( struct message_result *result )
 {
     if (result->timeout) remove_timeout_user( result->timeout );
     if (result->data) free( result->data );
-    if (result->callback_msg) free( result->callback_msg );
+    if (result->callback_msg)
+    {
+        free( result->callback_msg->data );
+        free( result->callback_msg );
+    }
     free( result );
 }
 
@@ -435,7 +439,8 @@ static void store_message_result( struct message_result *res, unsigned int resul
         if (res->callback_msg)
         {
             /* queue the callback message in the sender queue */
-            res->callback_msg->lparam = result;
+            struct callback_msg_data *data = res->callback_msg->data;
+            data->result = result;
             list_add_tail( &res->sender->msg_list[SEND_MESSAGE], &res->callback_msg->entry );
             set_queue_bits( res->sender, QS_SENDMESSAGE );
             res->callback_msg = NULL;
@@ -533,24 +538,34 @@ static struct message_result *alloc_message_result( struct msg_queue *send_queue
 
         if (msg->type == MSG_CALLBACK)
         {
+            struct callback_msg_data *data;
             struct message *callback_msg = mem_alloc( sizeof(*callback_msg) );
+
             if (!callback_msg)
             {
                 free( result );
                 return NULL;
             }
+            if (!(data = mem_alloc( sizeof(*data ))))
+            {
+                free( callback_msg );
+                free( result );
+                return NULL;
+            }
             callback_msg->type      = MSG_CALLBACK_RESULT;
             callback_msg->win       = msg->win;
             callback_msg->msg       = msg->msg;
-            callback_msg->wparam    = (unsigned long)callback;
+            callback_msg->wparam    = 0;
             callback_msg->lparam    = 0;
             callback_msg->time      = get_tick_count();
             callback_msg->x         = 0;
             callback_msg->y         = 0;
-            callback_msg->info      = callback_data;
+            callback_msg->info      = 0;
             callback_msg->result    = NULL;
-            callback_msg->data      = NULL;
+            callback_msg->data      = data;
-            callback_msg->data_size = 0;
+            callback_msg->data_size = sizeof(*data);
+            data->callback = callback;
+            data->data     = callback_data;
 
             result->callback_msg = callback_msg;
             list_add_head( &send_queue->callback_result, &result->sender_entry );