Example 8
Author: Ambreen Ilyas

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//// This example is from the ACE Programmers Guide.
//// Chapter: "Thread Management"
//// For details please see the guide at
//// http://www.cs.wustl.edu/~schmidt/ACE.html
//// AUTHOR: Umar Syyid (usyyid@hns.com)
//// and Ambreen Ilyas (ambreen@bitsmart.com)
/////////////////////////////////////////////////////////////////////////////////////////////////////////////

//Example 8
#include "ace/Synch_T.h"
#include "ace/Synch.h"

ACE_Atomic_Op<ACE_Thread_Mutex,int> foo;

static void*
worker(void *arg){
ACE_UNUSED_ARG(arg);
foo=5;
ACE_ASSERT (foo == 5);
++foo;
ACE_ASSERT (foo == 6);
--foo;
ACE_ASSERT (foo == 5);
foo += 10;
ACE_ASSERT (foo == 15);
foo -= 10;
ACE_ASSERT (foo == 5);
foo = 5L;
ACE_ASSERT (foo == 5);
return 0;
}

int main(int argc, char *argv[]){
if(argc<2){
ACE_DEBUG((LM_DEBUG,"Usage: <program_name> <number of threads>\n"));
ACE_OS::exit(1);
}
int n_threads=ACE_OS::atoi(argv[1]);
ACE_DEBUG((LM_DEBUG,"Preparing to spawn %d threads\n",n_threads));

//Spawn off n_threads number of threads
for(int i=0; i<n_threads; i++){
if(ACE_Thread::spawn((ACE_THR_FUNC)worker,0,THR_DETACHED|THR_NEW_LWP)==-1)
ACE_DEBUG((LM_DEBUG,"Error in spawning thread\n"));
}

//Wait for all the other threads to let the main thread know when it is time to exit
while(ACE_Thread::join(NULL,NULL,NULL)==0);
ACE_DEBUG((LM_DEBUG,"(%t)Other threads are finished. Program exiting..\n"));
}

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