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<HTML>
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   <TITLE>Example 1</TITLE>
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<FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT>
<BR><FONT COLOR="#CC0000">//// This example is from the ACE Programmers
Guide.</FONT>
<BR><FONT COLOR="#CC0000">////&nbsp; Chapter:&nbsp; "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">////&nbsp; 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>&nbsp;ACE_UNUSED_ARG(arg);
<BR>&nbsp;ACE_DEBUG((LM_DEBUG,"Thread (%t) Created to do some work"));
<BR>&nbsp;::number++;
<BR>&nbsp;ACE_DEBUG((LM_DEBUG," and number is %d\n",::number));
<BR>&nbsp;
<BR>&nbsp;<FONT COLOR="#FF0000">//Let the other guy go while I fall asleep
for a random period of time</FONT>
<BR>&nbsp;ACE_Thread::yield();
<BR>&nbsp;ACE_OS::sleep(ACE_OS::rand()%2);

<P><FONT COLOR="#FF0000">&nbsp;//Exiting now</FONT>
<BR>&nbsp;ACE_DEBUG((LM_DEBUG,
<BR>&nbsp;&nbsp; "\t\t Thread (%t) Done! \t The number is now: %d\n",number));
<BR>&nbsp;ACE_OS::fflush(stdout);
<BR>&nbsp;return 0;
<BR>&nbsp;}
<BR>&nbsp;

<P>int main(int argc, char *argv[]){
<BR>if(argc&lt;2)
<BR>&nbsp;ACE_DEBUG((LM_DEBUG,"Usage: &lt;program_name> &lt;number of threads>\n"));
<BR>&nbsp;
<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&lt;n_threads; i++){
<BR>&nbsp;if(ACE_Thread::spawn((ACE_THR_FUNC)worker)==-1)
<BR>&nbsp; ACE_DEBUG((LM_DEBUG,"Error in spawning thread\n"));
<BR>&nbsp;}

<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>&nbsp;<A HREF="ex02.html">Next Example</A>
<BR>&nbsp;
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