Small tweak to the new handle API: provide a `privdata' field in

each handle structure, set on initialisation and readable by an API
call.

[originally from svn r6798]

windows/winhandl.c

@@ -18,13 +18,6 @@
  * when one completes.
  */
 
-/*
- * TODO:
- *
- *  - could do with some sort of private-data field in each handle
- *    structure.
- */
-
 #include <assert.h>
 
 #include "putty.h"
@@ -58,6 +51,7 @@ struct handle_generic {
     int done;			       /* request subthread to terminate */
     int defunct;		       /* has the subthread already gone? */
     int busy;			       /* operation currently in progress? */
+    void *privdata;		       /* for client to remember who they are */
 };
 
 /* ----------------------------------------------------------------------
@@ -78,6 +72,7 @@ struct handle_input {
     int done;			       /* request subthread to terminate */
     int defunct;		       /* has the subthread already gone? */
     int busy;			       /* operation currently in progress? */
+    void *privdata;		       /* for client to remember who they are */
 
     /*
      * Data set by the input thread before signalling ev_to_main,
@@ -165,6 +160,7 @@ struct handle_output {
     int done;			       /* request subthread to terminate */
     int defunct;		       /* has the subthread already gone? */
     int busy;			       /* operation currently in progress? */
+    void *privdata;		       /* for client to remember who they are */
 
     /*
      * Data set by the main thread before signalling ev_from_main,
@@ -267,7 +263,8 @@ static int handle_find_evtomain(void *av, void *bv)
 	return 0;
 }
 
-struct handle *handle_input_new(HANDLE handle, handle_inputfn_t gotdata)
+struct handle *handle_input_new(HANDLE handle, handle_inputfn_t gotdata,
+				void *privdata)
 {
     struct handle *h = snew(struct handle);
 
@@ -280,6 +277,7 @@ struct handle *handle_input_new(HANDLE handle, handle_inputfn_t gotdata)
     h->u.i.defunct = FALSE;
     h->u.i.moribund = FALSE;
     h->u.i.done = FALSE;
+    h->u.i.privdata = privdata;
 
     if (!handles_by_evtomain)
 	handles_by_evtomain = newtree234(handle_cmp_evtomain);
@@ -293,7 +291,8 @@ struct handle *handle_input_new(HANDLE handle, handle_inputfn_t gotdata)
     return h;
 }
 
-struct handle *handle_output_new(HANDLE handle, handle_outputfn_t sentdata)
+struct handle *handle_output_new(HANDLE handle, handle_outputfn_t sentdata,
+				 void *privdata)
 {
     struct handle *h = snew(struct handle);
 
@@ -305,6 +304,7 @@ struct handle *handle_output_new(HANDLE handle, handle_outputfn_t sentdata)
     h->u.o.defunct = FALSE;
     h->u.o.moribund = FALSE;
     h->u.o.done = FALSE;
+    h->u.o.privdata = privdata;
     bufchain_init(&h->u.o.queued_data);
     h->u.o.sentdata = sentdata;
 
@@ -484,3 +484,8 @@ int handle_backlog(struct handle *h)
     assert(h->output);
     return bufchain_size(&h->u.o.queued_data);
 }
+
+void *handle_get_privdata(struct handle *h)
+{
+    return h->u.g.privdata;
+}

windows/winplink.c

@@ -577,8 +577,8 @@ int main(int argc, char **argv)
      * (The input one we leave until we're through the
      * authentication process.)
      */
-    stdout_handle = handle_output_new(outhandle, stdouterr_sent);
+    stdout_handle = handle_output_new(outhandle, stdouterr_sent, NULL);
-    stderr_handle = handle_output_new(errhandle, stdouterr_sent);
+    stderr_handle = handle_output_new(errhandle, stdouterr_sent, NULL);
 
     main_thread_id = GetCurrentThreadId();
 
@@ -593,7 +593,7 @@ int main(int argc, char **argv)
 	DWORD ticks;
 
 	if (!sending && back->sendok(backhandle)) {
-	    stdin_handle = handle_input_new(inhandle, stdin_gotdata);
+	    stdin_handle = handle_input_new(inhandle, stdin_gotdata, NULL);
 	    sending = TRUE;
 	}
 

windows/winstuff.h

@@ -411,14 +411,17 @@ void init_ucs(Config *, struct unicode_data *);
 struct handle;
 typedef int (*handle_inputfn_t)(struct handle *h, void *data, int len);
 typedef void (*handle_outputfn_t)(struct handle *h, int new_backlog);
-struct handle *handle_input_new(HANDLE handle, handle_inputfn_t gotdata);
+struct handle *handle_input_new(HANDLE handle, handle_inputfn_t gotdata,
-struct handle *handle_output_new(HANDLE handle, handle_outputfn_t sentdata);
+				void *privdata);
+struct handle *handle_output_new(HANDLE handle, handle_outputfn_t sentdata,
+				 void *privdata);
 int handle_write(struct handle *h, const void *data, int len);
 HANDLE *handle_get_events(int *nevents);
 void handle_free(struct handle *h);
 void handle_got_event(HANDLE event);
 void handle_unthrottle(struct handle *h, int backlog);
 int handle_backlog(struct handle *h);
+void *handle_get_privdata(struct handle *h);
 
 /*
  * pageantc.c needs to schedule callbacks for asynchronous agent