Example 1
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 1
#include "ace/Thread.h"
#include "ace/OS.h"
#include "ace/Synch_T.h"
#include "ace/Synch.h"
static int number=0;
static int seed=0;

static void*
worker(void *arg){
ACE_UNUSED_ARG(arg);
ACE_DEBUG((LM_DEBUG,"Thread (%t) Created to do some work"));
::number++;
ACE_DEBUG((LM_DEBUG," and number is %d\n",::number));
//Let the other guy go while I fall asleep for a random period of time
ACE_Thread::yield();
ACE_OS::sleep(ACE_OS::rand()%2);

//Exiting now
ACE_DEBUG((LM_DEBUG,
"\t\t Thread (%t) Done! \t The number is now: %d\n",number));
ACE_OS::fflush(stdout);
return 0;
}

int main(int argc, char *argv[]){
if(argc<2)
ACE_DEBUG((LM_DEBUG,"Usage: <program_name> <number of threads>\n"));
int n_threads=ACE_OS::atoi(argv[1]);
//Setup the random number generator
ACE_OS::srand(::seed);

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

//Wait for all the threads to exit before you let the main fall through
//and have the process exit. This way of using join is non-portable
//and may not work on a system using pthreads.
int check_count=0;
while(ACE_Thread::join(NULL,NULL,NULL)==0) check_count++;
ACE_ASSERT(check_count==n_threads);
}

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