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// $Id$
#include "JAWS/Concurrency.h"
#include "JAWS/IO_Handler.h"
#include "JAWS/Pipeline.h"
#include "JAWS/Pipeline_Tasks.h"
#include "JAWS/Policy.h"
#include "JAWS/Data_Block.h"
JAWS_Concurrency_Base::JAWS_Concurrency_Base (void)
{
}
int
JAWS_Concurrency_Base::put (ACE_Message_Block *mb, ACE_Time_Value *tv)
{
return this->putq (mb, tv);
}
int
JAWS_Concurrency_Base::svc (void)
{
int result = 0;
for (;;)
{
ACE_Message_Block *mb; // The message queue element
JAWS_Data_Block *db; // Contains the task list
JAWS_Dispatch_Policy *policy; // Contains task policies
JAWS_IO_Handler *handler; // Keeps the state of the task
JAWS_Pipeline_Handler *task; // The task itself
// At this point we could set a timeout value so that the
// threading strategy can delete a thread if there is nothing to
// do. Carefully think how to implement it so you don't leave
// yourself with 0 threads.
result = this->getq (mb);
// Use a NULL message block to indicate that the thread should shut
// itself down
if (result == -1 || mb == 0)
break;
db = ACE_dynamic_cast (JAWS_Data_Block *, mb->data_block ());
policy = db->policy ();
// Each time we iterate, we create a handler to maintain
// our state for us.
handler = policy->ioh_factory ()->create_io_handler ();
if (handler == 0)
{
ACE_DEBUG ((LM_DEBUG, "JAWS_Server::open, can't create handler\n"));
return -1;
}
// Set the initial task in the handler
handler->task (db->task ());
// Thread specific message block
JAWS_Data_Block ts_db;
ACE_Message_Block ts_mb (&ts_db);
ts_db.task (db->task ());
ts_db.policy (db->policy ());
ts_db.io_handler (handler);
do
{
// handler maintains the state of the protocol
task = handler->task ();
// Use a NULL task to make the thread recycle now
if (task == 0)
break;
// the task should set the handler to the appropriate next step
result = task->put (&ts_mb);
if (result == 1)
{
ACE_TRACE (("%p\n", "JAWS_Concurrency_Base::svc, waiting"));
// need to wait for an asynchronous event
// I don't know how to do this yet, so pretend it's
// an error
// handler = wait for completion ();
// db->io_handler (handler);
// result = 0;
result = -1;
}
if (result == -1)
{
// definately something wrong.
ACE_ERROR ((LM_ERROR, "%p\n", "JAWS_Concurrency_Base::svc"));
break;
}
}
while (result == 0);
policy->ioh_factory ()->destroy_io_handler (handler);
}
return 0;
}
JAWS_Dispatcher::JAWS_Dispatcher (void)
: policy_(0)
{
}
int
JAWS_Dispatcher::dispatch (ACE_Message_Block *mb)
{
return this->policy ()->concurrency ()->put (mb);
}
JAWS_Dispatch_Policy *
JAWS_Dispatcher::policy (void)
{
return this->policy_;
}
JAWS_Dispatch_Policy *
JAWS_Dispatcher::policy (JAWS_Dispatch_Policy *p)
{
this->policy_ = p;
return this->policy_;
}
int
JAWS_Thread_Pool_Task::open (long flags, int nthreads, int maxthreads)
{
this->nthreads_ = nthreads;
this->maxthreads_ = maxthreads;
if (this->activate (flags, nthreads) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "JAWS_Thread_Pool_Task::activate"),
-1);
return 0;
}
int
JAWS_Thread_Per_Task::open (long flags, int maxthreads)
{
this->flags_ = flags;
this->maxthreads_ = maxthreads;
return 0;
}
int
JAWS_Thread_Per_Task::put (ACE_Message_Block *mb, ACE_Time_Value *tv)
{
const int force_active = 1;
const int nthreads = 1;
if (this->activate (this->flags_, nthreads, force_active) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "JAWS_Thread_Pool_Task::activate"),
-1);
this->putq (mb, tv);
return 0;
}
#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
template class ACE_Singleton<JAWS_Dispatcher, ACE_SYNCH_MUTEX>;
template class ACE_Singleton<JAWS_Thread_Pool_Task, ACE_SYNCH_MUTEX>;
template class ACE_Singleton<JAWS_Thread_Per_Task, ACE_SYNCH_MUTEX>;
#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#pragma instantiate ACE_Singleton<JAWS_Dispatcher, ACE_SYNCH_MUTEX>
#pragma instantiate ACE_Singleton<JAWS_Thread_Pool_Task, ACE_SYNCH_MUTEX>
#pragma instantiate ACE_Singleton<JAWS_Thread_Per_Task, ACE_SYNCH_MUTEX>
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */
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