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// $Id$
#include "ace/config-all.h"
#include "ace/OS_main.h"
#if !defined (ACE_LACKS_FORK)
#include "ace/streams.h"
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#include <time.h>
typedef void (*timerTask_t)(void);
// Listing 1 code/ch07
pid_t timerTask (int initialDelay,
int interval,
timerTask_t task)
{
if (initialDelay < 1 && interval < 1)
return -1;
pid_t pid = fork ();
if (pid < 0)
return -1;
if (pid > 0)
return pid;
if (initialDelay > 0)
sleep (initialDelay);
if (interval < 1)
return 0;
while (1)
{
(*task) ();
sleep (interval);
}
ACE_NOTREACHED (return 0);
}
// Listing 1
// Listing 2 code/ch07
void foo ()
{
time_t now = time (0);
cerr << "The time is " << ctime (&now) << endl;
}
// Listing 2
void programMainLoop (void)
{
sleep (30);
}
// Listing 3 code/ch07
int ACE_TMAIN (int, ACE_TCHAR *[])
{
pid_t timerId = timerTask (3, 5, foo);
programMainLoop ();
kill (timerId, SIGINT);
return 0;
}
// Listing 3
#else
#include <stdio.h>
int ACE_TMAIN (int, ACE_TCHAR *[])
{
puts ("This very unportable example requires fork().\n");
return 0;
}
#endif /* ACE_LACKS_FORK */
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