ACE/examples/Threads/token.cpp

   1 // Test out the ACE Token class.
   2
   3 #include "ace/OS_main.h"
   4 #include "ace/Token.h"
   5 #include "ace/Task.h"
   6 #include "ace/OS_NS_time.h"
   7
   8
   9 #if defined (ACE_HAS_THREADS)
  10
  11 class My_Task : public ACE_Task<ACE_MT_SYNCH>
  12 {
  13 public:
  14   My_Task (int n);
  15   virtual int svc ();
  16
  17   static void sleep_hook (void *);
  18
  19 private:
  20   ACE_Token token_;
  21 };
  22
  23 My_Task::My_Task (int n)
  24 {
  25   // Make this Task into an Active Object.
  26   this->activate (THR_BOUND | THR_DETACHED, n);
  27
  28   // Wait for all the threads to exit.
  29   this->thr_mgr ()->wait ();
  30 }
  31
  32 void
  33 My_Task::sleep_hook (void *)
  34 {
  35   ACE_DEBUG ((LM_ERROR, "(%u) blocking, My_Task::sleep_hook () called\n",
  36               ACE_Thread::self())) ;
  37 }
  38
  39 // Test out the behavior of the ACE_Token class.
  40
  41 int
  42 My_Task::svc ()
  43 {
  44   for (size_t i = 0; i < 100; i++)
  45     {
  46       // Wait for up to 1 millisecond past the current time to get the token.
  47       ACE_Time_Value timeout (ACE_OS::time (0), 1000);
  48
  49       if (this->token_.acquire (&My_Task::sleep_hook, 0, &timeout) == 1)
  50         {
  51           this->token_.acquire ();
  52           this->token_.renew ();
  53           this->token_.release ();
  54           this->token_.release ();
  55         }
  56       else
  57         ACE_Thread::yield ();
  58     }
  59   return 0;
  60 }
  61
  62 int
  63 ACE_TMAIN (int argc, ACE_TCHAR *argv[])
  64 {
  65   My_Task tasks (argc > 1 ? ACE_OS::atoi (argv[1]) : 4);
  66
  67   return 0;
  68 }
  69 #else
  70 int
  71 ACE_TMAIN (int, ACE_TCHAR *[])
  72 {
  73   ACE_ERROR_RETURN ((LM_ERROR, "your platform doesn't support threads\n"), -1);
  74 }
  75 #endif /* */