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-rw-r--r--examples/Threads/future1.cpp412
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diff --git a/examples/Threads/future1.cpp b/examples/Threads/future1.cpp
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-// $Id$
-
-// ============================================================================
-//
-// = LIBRARY
-// tests
-//
-// = FILENAME
-// Test_Future.cpp
-//
-// = DESCRIPTION
-// This example tests the ACE Future.
-//
-// = AUTHOR
-// Andres Kruse <Andres.Kruse@cern.ch> and Douglas C. Schmidt
-// <schmidt@cs.wustl.edu>
-//
-// ============================================================================
-
-#include <math.h>
-#include "ace/Task.h"
-
-#include "ace/Synch.h"
-#include "ace/Message_Queue.h"
-#include "ace/Future.h"
-#include "ace/Method_Object.h"
-#include "ace/Activation_Queue.h"
-#include "ace/Auto_Ptr.h"
-
-#if defined (ACE_HAS_THREADS)
-
-typedef ACE_Atomic_Op<ACE_Thread_Mutex, int> ATOMIC_INT;
-
-// a counter for the tasks..
-static ATOMIC_INT task_count (0);
-
-// a counter for the futures..
-static ATOMIC_INT future_count (0);
-static ATOMIC_INT future_no (0);
-
-// a counter for the capsules..
-static ATOMIC_INT capsule_count (0);
-static ATOMIC_INT capsule_no (0);
-
-// a counter for the method objects...
-static ATOMIC_INT methodobject_count (0);
-static ATOMIC_INT methodobject_no (0);
-
-class Scheduler : public ACE_Task<ACE_MT_SYNCH>
- // = TITLE
- // Active Object Scheduler.
-{
- friend class Method_ObjectWork;
-public:
- Scheduler (const char *, Scheduler * = 0);
- ~Scheduler (void);
-
- virtual int open (void *args = 0);
- virtual int close (u_long flags = 0);
- virtual int svc (void);
-
- ACE_Future<double> work (double param, int count);
- ACE_Future<const char*> name (void);
- void end (void);
-
- double work_i (double, int);
- const char *name_i (void);
-
-private:
- char *name_;
- ACE_Activation_Queue activation_queue_;
- Scheduler *scheduler_;
-
-};
-
-class Method_Object_work : public ACE_Method_Object
- // = TITLE
- // Reification of the <work> method.
-{
-public:
- Method_Object_work (Scheduler *, double, int, ACE_Future<double> &);
- ~Method_Object_work (void);
- virtual int call (void);
-
-private:
- Scheduler *scheduler_;
- double param_;
- int count_;
- ACE_Future<double> future_result_;
-};
-
-Method_Object_work::Method_Object_work (Scheduler* new_Scheduler,
- double new_param,
- int new_count,
- ACE_Future<double> &new_result)
- : scheduler_ (new_Scheduler),
- param_ (new_param),
- count_ (new_count),
- future_result_ (new_result)
-{
- ACE_DEBUG ((LM_DEBUG,
- "(%t) Method_Object_work created\n"));
-}
-
-Method_Object_work::~Method_Object_work (void)
-{
- ACE_DEBUG ((LM_DEBUG, "(%t) Method_Object_work will be deleted.\n"));
-}
-
-
-int
-Method_Object_work::call (void)
-{
- return this->future_result_.set (this->scheduler_->work_i (this->param_, this->count_));
-}
-
-class Method_Object_name : public ACE_Method_Object
- // = TITLE
- // Reification of the <name> method.
-{
-public:
- Method_Object_name (Scheduler *, ACE_Future<const char*> &);
- ~Method_Object_name (void);
- virtual int call (void);
-
-private:
- Scheduler *scheduler_;
- ACE_Future<const char*> future_result_;
-};
-
-Method_Object_name::Method_Object_name (Scheduler *new_scheduler,
- ACE_Future<const char*> &new_result)
- : scheduler_ (new_scheduler),
- future_result_ (new_result)
-{
- ACE_DEBUG ((LM_DEBUG,
- "(%t) Method_Object_name created\n"));
-};
-
-Method_Object_name::~Method_Object_name (void)
-{
- ACE_DEBUG ((LM_DEBUG,
- "(%t) Method_Object_name will be deleted.\n"));
-}
-
-int
-Method_Object_name::call (void)
-{
- return future_result_.set (scheduler_->name_i ());
-}
-
-class Method_Object_end : public ACE_Method_Object
- // = TITLE
- // Reification of the <end> method.
-{
-public:
- Method_Object_end (Scheduler *new_Scheduler): scheduler_ (new_Scheduler) {}
- ~Method_Object_end (void) {}
- virtual int call (void) { this->scheduler_->close (); return -1; }
-
-private:
- Scheduler *scheduler_;
-};
-
-// constructor
-Scheduler::Scheduler (const char *newname, Scheduler *new_Scheduler)
-{
- ACE_NEW (this->name_, char[ACE_OS::strlen (newname) + 1]);
- ACE_OS::strcpy ((char *) this->name_, newname);
- this->scheduler_ = new_Scheduler;
- ACE_DEBUG ((LM_DEBUG, "(%t) Scheduler %s created\n", this->name_));
-}
-
-// Destructor
-Scheduler::~Scheduler (void)
-{
- ACE_DEBUG ((LM_DEBUG, "(%t) Scheduler %s will be destroyed\n", this->name_));
-}
-
-// open
-int
-Scheduler::open (void *)
-{
- task_count++;
- ACE_DEBUG ((LM_DEBUG, "(%t) Scheduler %s open\n", this->name_));
- return this->activate (THR_BOUND);
-}
-
-// close
-int
-Scheduler::close (u_long)
-{
- ACE_DEBUG ((LM_DEBUG, "(%t) Scheduler %s close\n", this->name_));
- task_count--;
- return 0;
-}
-
-// service..
-int
-Scheduler::svc (void)
-{
- for (;;)
- {
- // Dequeue the next method object (we use an auto pointer in
- // case an exception is thrown in the <call>).
- auto_ptr<ACE_Method_Object> mo (this->activation_queue_.dequeue ());
-
- ACE_DEBUG ((LM_DEBUG, "(%t) calling method object\n"));
- // Call it.
- if (mo->call () == -1)
- break;
- // Destructor automatically deletes it.
- }
-
- /* NOTREACHED */
- return 0;
-}
-
-void
-Scheduler::end (void)
-{
- this->activation_queue_.enqueue (new Method_Object_end (this));
-}
-
-
-// Here's where the Work takes place.
-double
-Scheduler::work_i (double param,
- int count)
-{
- double x = 0.0, y = 0.0;
-
- // @@ We should probably do something fun here, like compute the
- // Fibonacci sequence or something.
-
- for (int j = 0; j < count; j++)
- {
- x = x + param;
- y = y + double(::sin (x));
- }
-
- return y;
-}
-
-const char *
-Scheduler::name_i (void)
-{
- char *the_name;
-
- the_name = new char[ACE_OS::strlen (this->name_) + 1];
- ACE_OS::strcpy (the_name, this->name_);
-
- return the_name;
-}
-
-ACE_Future<const char *>
-Scheduler::name (void)
-{
- if (this->scheduler_)
- // Delegate to the Scheduler.
- return this->scheduler_->name ();
- else
- {
- ACE_Future<const char*> new_future;
-
- // @@ What happens if new fails here?
- this->activation_queue_.enqueue
- (new Method_Object_name (this, new_future));
-
- return new_future;
- }
-}
-
-ACE_Future<double>
-Scheduler::work (double newparam, int newcount)
-{
- if (this->scheduler_) {
- return this->scheduler_->work (newparam, newcount);
- }
- else {
- ACE_Future<double> new_future;
-
- this->activation_queue_.enqueue
- (new Method_Object_work (this, newparam, newcount, new_future));
- return new_future;
- }
-}
-
-// @@ These values should be set by the command line options!
-
-// Total number of iterations to <work>
-static int n_iterations = 50000;
-
-// Total number of loops.
-static int n_loops = 100;
-
-int
-main (int, char *[])
-{
- Scheduler *andres, *peter, *helmut, *matias;
-
- // Create active objects..
- // @@ Should "open" be subsumed within the constructor of
- // Scheduler()?
- andres = new Scheduler ("andres");
- andres->open ();
- peter = new Scheduler ("peter");
- peter->open ();
- helmut = new Scheduler ("helmut");
- helmut->open ();
-
- // Matias passes all asynchronous method calls on to Andres...
- matias = new Scheduler ("matias", andres);
- matias->open ();
-
- for (int i = 0; i < n_loops; i++)
- {
- {
- ACE_Future<double> fresulta, fresultb, fresultc, fresultd, fresulte;
- ACE_Future<const char*> fname;
-
- ACE_DEBUG ((LM_DEBUG, "(%t) going to do a non-blocking call\n"));
-
- fresulta = andres->work (0.01, 100 + (n_iterations * (i % 2)));
- fresultb = peter->work (0.01, 100 + (n_iterations * (i % 2)));
- fresultc = helmut->work (0.01, 100 + (n_iterations * (i % 2)));
- fresultd = matias->work (0.02, 100 + (n_iterations * (i % 2)));
- fname = andres->name ();
-
- // see if the result is available...
- if (fresulta.ready ())
- ACE_DEBUG ((LM_DEBUG, "(%t) wow.. work is ready.....\n"));
-
- ACE_DEBUG ((LM_DEBUG, "(%t) non-blocking call done... now blocking...\n"));
-
- // Save the result of fresulta.
-
- fresulte = fresulta;
-
- if (i % 3 == 0)
- {
- // Every 3rd time... disconnect the futures...
- // but "fresulte" should still contain the result...
- fresulta.cancel (10.0);
- fresultb.cancel (20.0);
- fresultc.cancel (30.0);
- fresultd.cancel (40.0);
- }
-
- double resulta = 0, resultb = 0, resultc = 0, resultd = 0, resulte = 0;
-
- fresulta.get (resulta);
- fresultb.get (resultb);
- fresultc.get (resultc);
- fresultd.get (resultd);
- fresulte.get (resulte);
-
- ACE_DEBUG ((LM_DEBUG, "(%t) result a %f\n", resulte));
- ACE_DEBUG ((LM_DEBUG, "(%t) result b %f\n", resulta));
- ACE_DEBUG ((LM_DEBUG, "(%t) result c %f\n", resultb));
- ACE_DEBUG ((LM_DEBUG, "(%t) result d %f\n", resultc));
- ACE_DEBUG ((LM_DEBUG, "(%t) result e %f\n", resultd));
-
- const char *name;
-
- fname.get (name);
-
- ACE_DEBUG ((LM_DEBUG, "(%t) name %s\n", name));
-
- }
-
- ACE_DEBUG ((LM_DEBUG,
- "(%t) task_count %d future_count %d capsule_count %d methodobject_count %d\n",
- (u_long) task_count,
- (u_long) future_count,
- (u_long) capsule_count,
- (u_long) methodobject_count));
- }
-
- // Close things down.
- andres->end ();
- peter->end ();
- helmut->end ();
- matias->end ();
-
- ACE_OS::sleep (2);
-
- ACE_DEBUG ((LM_DEBUG,
- "(%t) task_count %d future_count %d capsule_count %d methodobject_count %d\n",
- (u_long) task_count,
- (u_long) future_count,
- (u_long) capsule_count,
- (u_long) methodobject_count));
-
- ACE_DEBUG ((LM_DEBUG,"(%t) th' that's all folks!\n"));
-
- ACE_OS::sleep (5);
- return 0;
-}
-
-#if defined (ACE_TEMPLATES_REQUIRE_SPECIALIZATION)
-template class ACE_Atomic_Op<ACE_Thread_Mutex, int>;
-#endif /* ACE_TEMPLATES_REQUIRE_SPECIALIZATION */
-
-#else
-int
-main (int, char *[])
-{
- ACE_ERROR ((LM_ERROR, "threads not supported on this platform\n"));
- return 0;
-}
-#endif /* ACE_HAS_THREADS */
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