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// Task.cpp
// $Id$
#define ACE_BUILD_DLL
#include "ace/Task.h"
#include "ace/Module.h"
#include "ace/Service_Config.h"
#if !defined (__ACE_INLINE__)
#include "ace/Task.i"
#endif /* __ACE_INLINE__ */
#if defined (ACE_MT_SAFE) && !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Lock the creation of the Singleton.
ACE_Thread_Mutex ACE_Task_Exit::ace_task_lock_;
#endif /* defined (ACE_MT_SAFE) && !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES) */
ACE_Task_Exit *
ACE_Task_Exit::instance (void)
{
ACE_TRACE ("ACE_Task_Exit::instance");
#if defined (ACE_MT_SAFE) && defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
// Lock the creation of the Singleton. This should be inside of
// ACE_Svc_Handler, but GNU G++ is too lame to handle this...
static ACE_Thread_Mutex ace_task_lock_;
#endif /* defined (ACE_MT_SAFE) && defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES) */
// Determines if we were dynamically allocated.
static ACE_TSS_TYPE (ACE_Task_Exit) *instance_;
// Implement the Double Check pattern.
if (instance_ == 0)
{
ACE_MT (ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, ace_task_lock_, 0));
if (instance_ == 0)
ACE_NEW_RETURN (instance_, ACE_TSS_TYPE (ACE_Task_Exit), 0);
}
return ACE_TSS_GET (instance_, ACE_Task_Exit);
}
// Grab hold of the Task * so that we can close() it in the
// destructor.
ACE_Task_Exit::ACE_Task_Exit (void)
: t_ (0),
status_ ((void *) -1)
{
ACE_TRACE ("ACE_Task_Exit::ACE_Task_Exit");
}
// Returns the pointer to the ACE_Task.
ACE_Task_Base *
ACE_Task_Exit::get_task (void)
{
ACE_TRACE ("ACE_Task_Exit::get_task");
return this->t_;
}
// Set the this pointer...
void
ACE_Task_Exit::set_task (ACE_Task_Base *t)
{
ACE_TRACE ("ACE_Task_Exit::set_task");
this->t_ = t;
if (t != 0)
this->tc_.insert (t->thr_mgr ());
}
// Set the thread exit status value.
void *
ACE_Task_Exit::status (void *s)
{
ACE_TRACE ("ACE_Task_Exit::status");
return this->status_ = s;
}
void *
ACE_Task_Exit::status (void)
{
ACE_TRACE ("ACE_Task_Exit::status");
return this->status_;
}
// When this object is destroyed the Task is automatically closed
// down!
ACE_Task_Exit::~ACE_Task_Exit (void)
{
ACE_TRACE ("ACE_Task_Exit::~ACE_Task_Exit");
if (this->t_ != 0)
{
// The thread count must be decremented first in case the
// close() hook does something crazy like "delete this".
this->t_->thr_count_dec ();
this->t_->close (u_long (this->status_));
}
}
ACE_ALLOC_HOOK_DEFINE(ACE_Task)
ACE_Task_Base::ACE_Task_Base (ACE_Thread_Manager *thr_man)
: thr_count_ (0),
thr_mgr_ (thr_man),
flags_ (0),
grp_id_ (0)
{
}
// Get the current group id.
int
ACE_Task_Base::grp_id (void)
{
ACE_TRACE ("ACE_Task_Base::grp_id");
ACE_MT (ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1));
return this->grp_id_;
}
// Set the current group id.
void
ACE_Task_Base::grp_id (int id)
{
ACE_TRACE ("ACE_Task_Base::grp_id");
ACE_MT (ACE_GUARD (ACE_Thread_Mutex, ace_mon, this->lock_));
this->grp_id_ = id;
}
// Suspend a task.
int
ACE_Task_Base::suspend (void)
{
ACE_TRACE ("ACE_Task_Base::suspend");
ACE_MT (ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1));
if (this->thr_count_ > 0)
return this->thr_mgr_->suspend_task (this);
else
return 0;
}
// Resume a suspended task.
int
ACE_Task_Base::resume (void)
{
ACE_TRACE ("ACE_Task_Base::resume");
ACE_MT (ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1));
if (this->thr_count_ > 0)
return this->thr_mgr_->resume_task (this);
else
return 0;
}
int
ACE_Task_Base::activate (long flags,
int n_threads,
int force_active,
u_int priority,
int grp_id,
ACE_Task_Base *task)
{
ACE_TRACE ("ACE_Task_Base::activate");
#if defined (ACE_MT_SAFE)
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
if (this->thr_count_ > 0 && force_active == 0)
return 1; // Already active.
else
this->thr_count_ += n_threads;
// Use the ACE_Thread_Manager singleton if we're running as an
// active object and the caller didn't supply us with a
// Thread_Manager.
if (this->thr_mgr_ == 0)
this->thr_mgr_ = ACE_Service_Config::thr_mgr ();
this->grp_id_ = this->thr_mgr_->spawn_n (n_threads,
ACE_THR_FUNC (&ACE_Task_Base::svc_run),
(void *) this,
flags,
priority,
grp_id,
task);
if (this->grp_id_ == -1)
return -1;
else
return 0;
#else
{
// Keep the compiler from complaining.
n_threads = n_threads;
force_active = force_active;
priority = priority;
grp_id = grp_id;
task = task;
flags = flags;
errno = EINVAL;
return -1;
}
#endif /* ACE_MT_SAFE */
}
// Note that this routine often does not return since the thread that
// is executing it will do an ACE_Thread::exit() first!
void *
ACE_Task_Base::svc_run (void *args)
{
ACE_TRACE ("ACE_Task_Base::svc_run");
ACE_Task_Base *t = (ACE_Task_Base *) args;
// Obtain our thread-specific exit hook and make sure that it knows
// how to clean us up!
ACE_Task_Exit *exit_hook = ACE_Task_Exit::instance ();
exit_hook->set_task (t);
// Call the Task's svc() method.
void *status = (void *) t->svc ();
return exit_hook->status (status);
/* NOTREACHED */
}
// Forward the call to close() so that existing
// applications don't break.
int
ACE_Task_Base::module_closed (void)
{
return this->close (1);
}
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