SINQ Wiki: Diff: CallbackMessage

Diff: CallbackMessage

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JSPWiki v2.0.52

           Difference between 
          version 5 
          and 
          version 4:
          
          
Line 34 was replaced by line 34
-   SetCallbackMsg *SetClassCast(void *msg);
+   SetCallbackMsg *SetCallbackCast(void *msg);
Lines 37-39 were replaced by lines 37-39
- The members of callback message are all arguments needed for the handling of
- the callback. SetClassCast converts an anonymous message to an implementation. It returns
- the message if it is a SetCallbackMsg or NULL otherwise.
+ The members of callback message contain the additional arguments needed for the handling of
+ the callback. SetClassCast reveals if an anonymous message is a SetCallbackMsg. It returns
+ NULL otherwise.
Line 45 was replaced by line 45
-   SetCallbackMsg *SetClassCast(void *msg) {
+   SetCallbackMsg *SetCallbackCast(void *msg) {
Lines 71-72 were replaced by lines 71-73
-     SetCallbackMsg *setMsg = SetClassCast(msg);
-
+     SetCallbackMsg *setMsg = SetCallbackCast(msg);
+     MyData *mydata;
+
Line 74 was replaced by lines 75-76
-
+
+     mydata = data;
At line 93 added 23 lines.
+ An implementation may use the same callback function for handling different
+ callback messages, with the same user data:
+ {{{
+ int CombinedCallback(Hdb *node, void * msg, void *data) {
+   SetCallbackMsg *setMsg;
+   UpdateCallbackMsg *updateMsg;
+   MyData *mydata = data;
+
+   setMsg = SetCallbackCast(msg);
+   if (setMsg) {
+     /* handle setMsg */
+     return 1;
+   }
+
+   updateMsg= UpdateCallbackCast(msg);
+   if (updateMsg) {
+     /* handle updateMsg */
+     return 1;
+   }
+
+   return 0; /* not handled */
+ }
+ }}}


          

      

      

      
      Back to CallbackMessage,
       or to the Page History.
 Line 34 was replaced by line 34
--   SetCallbackMsg *SetClassCast(void *msg);
++   SetCallbackMsg *SetCallbackCast(void *msg);
 Lines 37-39 were replaced by lines 37-39
-- The members of callback message are all arguments needed for the handling of
-- the callback. SetClassCast converts an anonymous message to an implementation. It returns
-- the message if it is a SetCallbackMsg or NULL otherwise.
++ The members of callback message contain the additional arguments needed for the handling of
++ the callback. SetClassCast reveals if an anonymous message is a SetCallbackMsg. It returns
++ NULL otherwise.
 Line 45 was replaced by line 45
--   SetCallbackMsg *SetClassCast(void *msg) {
++   SetCallbackMsg *SetCallbackCast(void *msg) {
 Lines 71-72 were replaced by lines 71-73
--     SetCallbackMsg *setMsg = SetClassCast(msg);
--
++     SetCallbackMsg *setMsg = SetCallbackCast(msg);
++     MyData *mydata;
++
 Line 74 was replaced by lines 75-76
--
++
++     mydata = data;
 At line 93 added 23 lines.
++ An implementation may use the same callback function for handling different
++ callback messages, with the same user data:
++ {{{
++ int CombinedCallback(Hdb *node, void * msg, void *data) {
++   SetCallbackMsg *setMsg;
++   UpdateCallbackMsg *updateMsg;
++   MyData *mydata = data;
++
++   setMsg = SetCallbackCast(msg);
++   if (setMsg) {
++     /* handle setMsg */
++     return 1;
++   }
++
++   updateMsg= UpdateCallbackCast(msg);
++   if (updateMsg) {
++     /* handle updateMsg */
++     return 1;
++   }
++
++   return 0; /* not handled */
++ }
++ }}}