fixed race condition

src/db/dbCAC.h

@@ -73,7 +73,6 @@ public:
         unsigned type, unsigned long count, unsigned mask, cacChannel::ioid * );
     void destroy ();
     void show ( unsigned level ) const;
-    void channelDestroyNotify ();
     void * operator new ( size_t size );
     void operator delete ( void *pCadaver, size_t size );
 protected:

src/db/dbServiceIO.cpp

@@ -257,7 +257,6 @@ void dbServiceIO::destroyAllIO ( dbChannelIO & chan )
         while ( ( pIO = chan.dbServicePrivateListOfIO::eventq.get() ) ) {
             this->ioTable.remove ( *pIO );
             tmp.add ( *pIO );
-            pIO->channelDestroyNotify ();
         }
         if ( chan.dbServicePrivateListOfIO::pBlocker ) {
             this->ioTable.remove ( *chan.dbServicePrivateListOfIO::pBlocker );

src/db/dbSubscriptionIO.cpp

@@ -57,6 +57,8 @@ dbSubscriptionIO::~dbSubscriptionIO ()
     if ( this->es ) {
         db_cancel_event ( this->es );
     }
+    this->notify.exception ( ECA_CHANDESTROY,
+        this->chan.pName(), this->type, this->count );
 }
 
 void dbSubscriptionIO::destroy ()
@@ -83,12 +85,6 @@ extern "C" void dbSubscriptionEventCallback ( void *pPrivate, struct dbAddr * /*
     pIO->chan.callStateNotify ( pIO->type, pIO->count, pfl, pIO->notify );
 }
 
-void dbSubscriptionIO::channelDestroyNotify ()
-{
-    this->notify.exception ( ECA_CHANDESTROY,
-        this->chan.pName(), this->type, this->count );
-}
-
 void dbSubscriptionIO::show ( unsigned level ) const
 {
     printf ( "Data base subscription IO at %p\n",