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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 1</TITLE>
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<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 1</FONT>
<BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Thread.h"</FONT>
<BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/OS.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/Synch.h"</FONT>
<BR>static int number=0;
<BR>static int seed=0;
<P>static void*
<BR>worker(void *arg){
<BR> ACE_UNUSED_ARG(arg);
<BR> ACE_DEBUG((LM_DEBUG,"Thread (%t) Created to do some work"));
<BR> ::number++;
<BR> ACE_DEBUG((LM_DEBUG," and number is %d\n",::number));
<BR>
<BR> <FONT COLOR="#FF0000">//Let the other guy go while I fall asleep
for a random period of time</FONT>
<BR> ACE_Thread::yield();
<BR> ACE_OS::sleep(ACE_OS::rand()%2);
<P><FONT COLOR="#FF0000"> //Exiting now</FONT>
<BR> ACE_DEBUG((LM_DEBUG,
<BR> "\t\t Thread (%t) Done! \t The number is now: %d\n",number));
<BR> ACE_OS::fflush(stdout);
<BR> return 0;
<BR> }
<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>
<BR>int n_threads=ACE_OS::atoi(argv[1]);
<BR><FONT COLOR="#FF0000">//Setup the random number generator</FONT>
<BR>ACE_OS::srand(::seed);
<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)==-1)
<BR> ACE_DEBUG((LM_DEBUG,"Error in spawning thread\n"));
<BR> }
<P><FONT COLOR="#FF0000">//Wait for all the threads to exit before you
let the main fall through</FONT>
<BR><FONT COLOR="#FF0000">//and have the process exit. This way of using
join is non-portable</FONT>
<BR><FONT COLOR="#FF0000">//and may not work on a system using pthreads.</FONT>
<BR>int check_count=0;
<BR>while(ACE_Thread::join(NULL,NULL,NULL)==0) check_count++;
<BR>ACE_ASSERT(check_count==n_threads);
<BR>}
<P> <A HREF="ex02.html">Next Example</A>
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