<HTML> <!-- ex04.html,v 1.2 2000/06/04 22:02:08 brunsch Exp --> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <META NAME="Author" CONTENT="Ambreen Ilyas"> <META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (X11; I; SunOS 5.5.1 sun4u) [Netscape]"> <TITLE>Example 4</TITLE> </HEAD> <BODY> <FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT> <BR><FONT COLOR="#CC0000">//// This example is from the ACE Programmers Guide.</FONT> <BR><FONT COLOR="#CC0000">//// Chapter: "The Reactor" (Event Management)</FONT> <BR><FONT COLOR="#CC0000">//// For details please see the guide at</FONT> <BR><FONT COLOR="#CC0000">//// http://www.cs.wustl.edu/~schmidt/ACE.html</FONT> <BR><FONT COLOR="#CC0000">//// AUTHOR: Umar Syyid (usyyid@hns.com)</FONT> <BR><FONT COLOR="#CC0000">//// and Ambreen Ilyas (ambreen@bitsmart.com)</FONT> <BR><FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT> <P><FONT COLOR="#FF0000">//Example 4</FONT> <BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Reactor.h"</FONT> <BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Event_Handler.h"</FONT> <BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Synch_T.h"</FONT> <BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Thread_Manager.h"</FONT> <BR><FONT COLOR="#000099">#define</FONT> <FONT COLOR="#663366">WAIT_TIME 1</FONT> <BR><FONT COLOR="#000099">#define</FONT><FONT COLOR="#663366"> SLEEP_TIME 2</FONT> <P>class My_Handler: public ACE_Event_Handler{ <BR> public: <P><FONT COLOR="#FF0000"> //Start the event handling process.</FONT> <BR> My_Handler(){ <BR> ACE_DEBUG((LM_DEBUG,"Event Handler created\n")); <BR> ACE_Reactor::instance()->max_notify_iterations(5); <BR> return 0; <BR> } <P><FONT COLOR="#FF0000">//Perform the notifications i.e., notify the reactor 10 times</FONT> <BR> void perform_notifications(){ <BR> for(int i=0;i<10;i++) <BR> ACE_Reactor::instance()-> <BR> notify(this,ACE_Event_Handler::READ_MASK); <BR> } <BR> <BR><FONT COLOR="#FF0000"> //The actual handler which in this case will handle the notifications</FONT> <BR> int handle_input(int){ <BR> ACE_DEBUG((LM_DEBUG,"Got notification # %d\n",no)); <BR> no++; <BR> return 0; <BR> } <BR>private: <BR> static int no; <BR>}; <P><FONT COLOR="#FF0000">//Static members</FONT> <BR>int My_Handler::no=1; <BR> <P>int main(int argc, char *argv[]){ <BR><FONT COLOR="#FF0000"> //Instantiating the handler</FONT> <BR> My_Handler handler; <BR> <BR><FONT COLOR="#FF0000"> //The done flag is set to not done yet.</FONT> <BR> int done=0; <P>while(1){ <BR> <FONT COLOR="#FF0000"> //After WAIT_TIME the handle_events will fall through if no events arrive.</FONT> <BR> ACE_Reactor::instance()->handle_events(ACE_Time_Value(WAIT_TIME)); <BR> if(!done){ <BR> handler.perform_notifications(); <BR> done=1; <BR> } <BR> sleep(SLEEP_TIME); <BR> } <BR>} <P> <A HREF="ex05.html">Next Example</A> </BODY> </HTML>