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<HTML>
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<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 8</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: "Thread 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="#CC0000">//Example 8</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/Synch.h"</FONT>
<P>ACE_Atomic_Op<ACE_Thread_Mutex,int> foo;
<P>static void*
<BR>worker(void *arg){
<BR> ACE_UNUSED_ARG(arg);
<BR> foo=5;
<BR> ACE_ASSERT (foo == 5);
<BR>
<BR> ++foo;
<BR> ACE_ASSERT (foo == 6);
<BR>
<BR> --foo;
<BR> ACE_ASSERT (foo == 5);
<BR>
<BR> foo += 10;
<BR> ACE_ASSERT (foo == 15);
<BR>
<BR> foo -= 10;
<BR> ACE_ASSERT (foo == 5);
<BR>
<BR> foo = 5L;
<BR> ACE_ASSERT (foo == 5);
<BR> return 0;
<BR>}
<P>int main(int argc, char *argv[]){
<BR>if(argc<2){
<BR> ACE_DEBUG((LM_DEBUG,"Usage: <program_name> <number of threads>\n"));
<BR> ACE_OS::exit(1);
<BR> }
<BR>
<BR>int n_threads=ACE_OS::atoi(argv[1]);
<BR>ACE_DEBUG((LM_DEBUG,"Preparing to spawn %d threads\n",n_threads));
<BR>
<P><FONT COLOR="#FF0000">//Spawn off n_threads number of threads</FONT>
<BR>for(int i=0; i<n_threads; i++){
<BR> if(ACE_Thread::spawn((ACE_THR_FUNC)worker,0,THR_DETACHED|THR_NEW_LWP)==-1)
<BR> ACE_DEBUG((LM_DEBUG,"Error in spawning thread\n"));
<BR> }
<P><FONT COLOR="#FF0000">//Wait for all the other threads to let the main
thread know when it is time to exit</FONT>
<BR>while(ACE_Thread::join(NULL,NULL,NULL)==0);
<BR>ACE_DEBUG((LM_DEBUG,"(%t)Other threads are finished. Program exiting..\n"));
<BR>}
<P> <A HREF="../Chap_5/ex01.html">Next Example</A>
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