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// $Id: Barrier.cpp 80826 2008-03-04 14:51:23Z wotte $
#include "ace/config-lite.h"
#if defined (ACE_HAS_THREADS)
#include "ace/OS_NS_stdlib.h"
#include "ace/OS_NS_time.h"
#include "ace/Task.h"
#include "ace/Synch.h"
// Listing 2 code/ch14
class HA_CommandHandler : public ACE_Task<ACE_MT_SYNCH>
{
public:
enum { N_THREADS = 5 };
HA_CommandHandler (ACE_Barrier& startup_barrier,
ACE_Barrier &shutdown_barrier)
: startup_barrier_(startup_barrier),
shutdown_barrier_(shutdown_barrier)
{ }
void initialize_handler (void);
int handle_command_requests (void);
int svc (void)
{
initialize_handler ();
startup_barrier_.wait ();
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%t: %D) Started\n")));
while (handle_command_requests () > 0)
;
shutdown_barrier_.wait ();
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%t: %D) Ended\n")));
return 0;
}
private:
ACE_Barrier& startup_barrier_;
ACE_Barrier& shutdown_barrier_;
};
// Listing 2
void
HA_CommandHandler::initialize_handler (void)
{
ACE_Time_Value tv (0, ACE_OS::rand () * 100);
timespec_t t = (timespec_t)tv;
ACE_OS::nanosleep (&t);
}
int
HA_CommandHandler::handle_command_requests (void)
{
ACE_Time_Value tv (0, ACE_OS::rand () * 100);
timespec_t t = (timespec_t)tv;
// Simulate work.
ACE_OS::nanosleep (&t);
return -1;
}
// Listing 1 code/ch14
int ACE_TMAIN (int, ACE_TCHAR *[])
{
ACE_Barrier startup_barrier (HA_CommandHandler::N_THREADS);
ACE_Barrier shutdown_barrier (HA_CommandHandler::N_THREADS);
HA_CommandHandler handler (startup_barrier, shutdown_barrier);
handler.activate (THR_NEW_LWP | THR_JOINABLE,
HA_CommandHandler::N_THREADS);
handler.wait ();
return 0;
}
// Listing 1
#else
#include "ace/OS_main.h"
#include "ace/OS_NS_stdio.h"
int ACE_TMAIN (int, ACE_TCHAR *[])
{
ACE_OS::puts (ACE_TEXT ("This example requires threads."));
return 0;
}
#endif /* ACE_HAS_THREADS */
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