--- IO-AIO/AIO.xs	2006/10/23 00:17:07	1.53
+++ IO-AIO/AIO.xs	2006/10/23 18:48:08	1.58
@@ -57,8 +57,8 @@
   REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
   REQ_READDIR,
   REQ_LINK, REQ_SYMLINK,
+  REQ_GROUP, REQ_NOP,
   REQ_SLEEP,
-  REQ_GROUP,
 };
 
 #define AIO_REQ_KLASS "IO::AIO::REQ"
@@ -85,9 +85,14 @@
   int errorno;
   STRLEN dataoffset;
   mode_t mode; /* open */
-  unsigned char cancelled;
+  unsigned char pri;
+  unsigned char flags;
 } aio_cb;
 
+enum {
+  FLAG_CANCELLED = 0x01,
+};
+
 typedef aio_cb *aio_req;
 typedef aio_cb *aio_req_ornot;
 
@@ -132,7 +137,7 @@
 
 static void aio_grp_feed (aio_req grp)
 {
-  while (grp->length < grp->fd2)
+  while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
     {
       int old_len = grp->length;
 
@@ -193,7 +198,7 @@
   dSP;
   int errorno = errno;
 
-  if (req->cancelled || !SvOK (req->callback))
+  if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
     return;
 
   errno = req->errorno;
@@ -261,6 +266,7 @@
           }
         break;
 
+      case REQ_NOP:
       case REQ_SLEEP:
         break;
 
@@ -322,7 +328,7 @@
 
 static void req_cancel (aio_req req)
 {
-  req->cancelled = 1;
+  req->flags |= FLAG_CANCELLED;
 
   if (req->type == REQ_GROUP)
     {
@@ -787,7 +793,7 @@
      
       errno = 0; /* strictly unnecessary */
 
-      if (!req->cancelled)
+      if (!(req->flags & FLAG_CANCELLED))
         switch (type = req->type) /* remember type for QUIT check */
           {
             case REQ_READ:      req->result = pread     (req->fd, req->dataptr, req->length, req->offset); break;
@@ -822,6 +828,8 @@
                 req->result = select (0, 0, 0, 0, &tv);
               }
 
+            case REQ_GROUP:
+            case REQ_NOP:
             case REQ_QUIT:
               break;
 
@@ -1214,6 +1222,18 @@
 }
 
 void
+aio_nop (callback=&PL_sv_undef)
+	SV * callback
+	PPCODE:
+{
+	dREQ;
+
+        req->type = REQ_NOP;
+
+	REQ_SEND;
+}
+
+void
 flush ()
 	PROTOTYPE:
 	CODE:
@@ -1274,6 +1294,12 @@
 	CODE:
         req_cancel (req);
 
+void
+cb (aio_req req, SV *callback=&PL_sv_undef)
+	CODE:
+        SvREFCNT_dec (req->callback);
+        req->callback = newSVsv (callback);
+
 MODULE = IO::AIO                PACKAGE = IO::AIO::GRP
 
 void
@@ -1324,23 +1350,13 @@
 }
 
 void
-lock (aio_req grp)
-	CODE:
-        ++grp->length;
-
-void
-unlock (aio_req grp)
-	CODE:
-        aio_grp_dec (grp);
-
-void
-feeder_limit (aio_req grp, int limit)
+feed_limit (aio_req grp, int limit)
 	CODE:
         grp->fd2 = limit;
         aio_grp_feed (grp);
 
 void
-set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
+feed (aio_req grp, SV *callback=&PL_sv_undef)
 	CODE:
 {
         SvREFCNT_dec (grp->fh2);