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// $Id$
#include "ace/Message_Queue.h"
#include "ace/Log_Msg.h"
#if !defined (__ACE_INLINE__)
#include "ace/Message_Queue.inl"
#endif /* __ACE_INLINE__ */
ACE_RCSID (ace,
Message_Queue,
"$Id$")
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
ACE_Message_Queue_Base::~ACE_Message_Queue_Base (void)
{
}
int
ACE_Message_Queue_Base::state (void)
{
ACE_TRACE ("ACE_Message_Queue_Base::state");
return this->state_;
}
#if defined (ACE_VXWORKS)
////////////////////////////////
// class ACE_Message_Queue_Vx //
////////////////////////////////
void
ACE_Message_Queue_Vx::dump (void) const
{
#if defined (ACE_HAS_DUMP)
ACE_TRACE ("ACE_Message_Queue_Vx::dump");
ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
switch (this->state_)
{
case ACE_Message_Queue_Base::ACTIVATED:
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("state = ACTIVATED\n")));
break;
case ACE_Message_Queue_Base::DEACTIVATED:
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("state = DEACTIVATED\n")));
break;
case ACE_Message_Queue_Base::PULSED:
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("state = PULSED\n")));
break;
}
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("low_water_mark = %d\n")
ACE_LIB_TEXT ("high_water_mark = %d\n")
ACE_LIB_TEXT ("cur_bytes = %d\n")
ACE_LIB_TEXT ("cur_length = %d\n")
ACE_LIB_TEXT ("cur_count = %d\n")
ACE_LIB_TEXT ("head_ = %u\n")
ACE_LIB_TEXT ("MSG_Q_ID = %u\n"),
this->low_water_mark_,
this->high_water_mark_,
this->cur_bytes_,
this->cur_length_,
this->cur_count_,
this->head_,
this->tail_));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_HAS_DUMP */
}
ACE_Message_Queue_Vx::ACE_Message_Queue_Vx (size_t max_messages,
size_t max_message_length,
ACE_Notification_Strategy *ns)
: ACE_Message_Queue<ACE_NULL_SYNCH> (0, 0, ns),
max_messages_ (static_cast<int> (max_messages)),
max_message_length_ (static_cast<int> (max_message_length))
{
ACE_TRACE ("ACE_Message_Queue_Vx::ACE_Message_Queue_Vx");
if (this->open (max_messages_, max_message_length_, ns) == -1)
ACE_ERROR ((LM_ERROR, ACE_LIB_TEXT ("open")));
}
ACE_Message_Queue_Vx::~ACE_Message_Queue_Vx (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::~ACE_Message_Queue_Vx");
if (this->tail_ != 0 && this->close () == -1)
ACE_ERROR ((LM_ERROR, ACE_LIB_TEXT ("close")));
}
// Don't bother locking since if someone calls this function more than
// once for the same queue, we're in bigger trouble than just
// concurrency control!
int
ACE_Message_Queue_Vx::open (size_t max_messages,
size_t max_message_length,
ACE_Notification_Strategy *ns)
{
ACE_TRACE ("ACE_Message_Queue_Vx::open");
this->high_water_mark_ = 0;
this->low_water_mark_ = 0;
this->cur_bytes_ = 0;
this->cur_length_ = 0;
this->cur_count_ = 0;
this->head_ = 0;
this->notification_strategy_ = ns;
this->max_messages_ = static_cast<int> (max_messages);
this->max_message_length_ = static_cast<int> (max_message_length);
if (tail_)
{
// Had already created a msgQ, so delete it.
close ();
activate_i ();
}
return (this->tail_ =
reinterpret_cast<ACE_Message_Block *> (
::msgQCreate (max_messages_,
max_message_length_,
MSG_Q_FIFO))) == 0 ? -1 : 0;
}
// Clean up the queue if we have not already done so!
int
ACE_Message_Queue_Vx::close (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::close");
// Don't lock, because we don't have a lock. It shouldn't be
// necessary, anyways.
this->deactivate_i ();
// Don't bother to free up the remaining message on the list,
// because we don't have any way to iterate over what's in the
// queue.
return ::msgQDelete (msgq ());
}
int
ACE_Message_Queue_Vx::is_empty_i (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::is_empty_i");
return ::msgQNumMsgs (msgq ()) == 0;
}
int
ACE_Message_Queue_Vx::is_full_i (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::is_full_i");
return ::msgQNumMsgs (msgq ()) >= max_messages_;
}
size_t
ACE_Message_Queue_Vx::high_water_mark (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::high_water_mark");
ACE_NOTSUP_RETURN ((size_t) -1);
}
void
ACE_Message_Queue_Vx::high_water_mark (size_t)
{
ACE_TRACE ("ACE_Message_Queue_Vx::high_water_mark");
ACE_NOTSUP;
}
size_t
ACE_Message_Queue_Vx::low_water_mark (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::low_water_mark");
// Don't need to guard, because this is fixed.
ACE_NOTSUP_RETURN ((size_t) -1);
}
void
ACE_Message_Queue_Vx::low_water_mark (size_t)
{
ACE_TRACE ("ACE_Message_Queue_Vx::low_water_mark");
ACE_NOTSUP;
}
size_t
ACE_Message_Queue_Vx::message_bytes (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::message_bytes");
ACE_NOTSUP_RETURN ((size_t) -1);
}
size_t
ACE_Message_Queue_Vx::message_length (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::message_length");
ACE_NOTSUP_RETURN ((size_t) -1);
}
size_t
ACE_Message_Queue_Vx::message_count (void)
{
ACE_TRACE ("ACE_Message_Queue_Vx::message_count");
// Don't need to guard, because this is a system call.
return ::msgQNumMsgs (msgq ());
}
void
ACE_Message_Queue_Vx::message_bytes (size_t)
{
ACE_TRACE ("ACE_Message_Queue_Vx::message_bytes");
ACE_NOTSUP;
}
void
ACE_Message_Queue_Vx::message_length (size_t)
{
ACE_TRACE ("ACE_Message_Queue_Vx::message_length");
ACE_NOTSUP;
}
int
ACE_Message_Queue_Vx::signal_enqueue_waiters (void)
{
// No-op.
return 0;
}
int
ACE_Message_Queue_Vx::signal_dequeue_waiters (void)
{
// No-op.
return 0;
}
int
ACE_Message_Queue_Vx::enqueue_tail_i (ACE_Message_Block *new_item)
{
ACE_TRACE ("ACE_Message_Queue_Vx::enqueue_tail_i");
if (new_item == 0)
return -1;
// Don't try to send a composite message!!!! Only the first
// block will be sent.
++this->cur_count_;
// Always use this method to actually send a message on the queue.
if (::msgQSend (msgq (),
new_item->rd_ptr (),
new_item->size (),
WAIT_FOREVER,
MSG_PRI_NORMAL) == OK)
return ::msgQNumMsgs (msgq ());
else
return -1;
}
int
ACE_Message_Queue_Vx::enqueue_head_i (ACE_Message_Block *new_item)
{
ACE_TRACE ("ACE_Message_Queue_Vx::enqueue_head_i");
// Just delegate to enqueue_tail_i.
return enqueue_tail_i (new_item);
}
int
ACE_Message_Queue_Vx::enqueue_i (ACE_Message_Block *new_item)
{
ACE_TRACE ("ACE_Message_Queue_Vx::enqueue_i");
if (new_item == 0)
return -1;
if (this->head_ == 0)
// Should always take this branch.
return this->enqueue_head_i (new_item);
else
ACE_NOTSUP_RETURN (-1);
}
int
ACE_Message_Queue_Vx::enqueue_deadline_i (ACE_Message_Block *new_item)
{
ACE_TRACE ("ACE_Message_Queue_Vx::enqueue_deadline_i");
// Just delegate to enqueue_tail_i.
return enqueue_tail_i (new_item);
}
// Actually get the first ACE_Message_Block (no locking, so must be
// called with locks held). This method assumes that the queue has at
// least one item in it when it is called.
int
ACE_Message_Queue_Vx::dequeue_head_i (ACE_Message_Block *&first_item)
{
ACE_TRACE ("ACE_Message_Queue_Vx::dequeue_head_i");
// We don't allocate a new Message_Block: the caller must provide
// it, and must ensure that it is big enough (without chaining).
if (first_item == 0 || first_item->wr_ptr () == 0)
return -1;
if (::msgQReceive (msgq (),
first_item->wr_ptr (),
first_item->size (),
WAIT_FOREVER) == ERROR)
return -1;
else
return ::msgQNumMsgs (msgq ());
}
int
ACE_Message_Queue_Vx::dequeue_prio_i (ACE_Message_Block *& /*dequeued*/)
{
ACE_TRACE ("ACE_Message_Queue_Vx::dequeue_prio_i");
ACE_NOTSUP_RETURN (-1);
}
int
ACE_Message_Queue_Vx::dequeue_tail_i (ACE_Message_Block *& /*dequeued*/)
{
ACE_TRACE ("ACE_Message_Queue_Vx::dequeue_tail_i");
ACE_NOTSUP_RETURN (-1);
}
int
ACE_Message_Queue_Vx::dequeue_deadline_i (ACE_Message_Block *& /*dequeued*/)
{
ACE_TRACE ("ACE_Message_Queue_Vx::dequeue_deadline_i");
ACE_NOTSUP_RETURN (-1);
}
// Take a look at the first item without removing it.
int
ACE_Message_Queue_Vx::wait_not_full_cond (ACE_Guard<ACE_Null_Mutex> &mon,
ACE_Time_Value *tv)
{
// Always return here, and let the VxWorks message queue handle blocking.
ACE_UNUSED_ARG (mon);
ACE_UNUSED_ARG (tv);
return 0;
}
int
ACE_Message_Queue_Vx::wait_not_empty_cond (ACE_Guard<ACE_Null_Mutex> &mon,
ACE_Time_Value *tv)
{
// Always return here, and let the VxWorks message queue handle blocking.
ACE_UNUSED_ARG (mon);
ACE_UNUSED_ARG (tv);
return 0;
}
#if ! defined (ACE_NEEDS_FUNC_DEFINITIONS)
int
ACE_Message_Queue_Vx::peek_dequeue_head (ACE_Message_Block *&,
ACE_Time_Value *)
{
ACE_NOTSUP_RETURN (-1);
}
#endif /* ! ACE_NEEDS_FUNC_DEFINITIONS */
#endif /* ACE_VXWORKS */
#if defined (ACE_WIN32) && (ACE_HAS_WINNT4 != 0)
ACE_Message_Queue_NT::ACE_Message_Queue_NT (DWORD max_threads)
: max_cthrs_ (max_threads),
cur_thrs_ (0),
cur_bytes_ (0),
cur_length_ (0),
cur_count_ (0),
completion_port_ (ACE_INVALID_HANDLE)
{
ACE_TRACE ("ACE_Message_Queue_NT::ACE_Message_Queue_NT");
this->open (max_threads);
}
int
ACE_Message_Queue_NT::open (DWORD max_threads)
{
ACE_TRACE ("ACE_Message_Queue_NT::open");
this->max_cthrs_ = max_threads;
this->completion_port_ = ::CreateIoCompletionPort (ACE_INVALID_HANDLE,
0,
ACE_Message_Queue_Base::ACTIVATED,
max_threads);
return (this->completion_port_ == 0 ? -1 : 0);
}
int
ACE_Message_Queue_NT::close (void)
{
ACE_TRACE ("ACE_Message_Queue_NT::close");
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
this->deactivate ();
return (::CloseHandle (this->completion_port_) ? 0 : -1 );
}
ACE_Message_Queue_NT::~ACE_Message_Queue_NT (void)
{
ACE_TRACE ("ACE_Message_Queue_NT::~ACE_Message_Queue_NT");
this->close ();
}
int
ACE_Message_Queue_NT::enqueue (ACE_Message_Block *new_item,
ACE_Time_Value *)
{
ACE_TRACE ("ACE_Message_Queue_NT::enqueue");
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
if (this->state_ != ACE_Message_Queue_Base::DEACTIVATED)
{
size_t const msize = new_item->total_size ();
size_t const mlength = new_item->total_length ();
// Note - we send ACTIVATED in the 3rd arg to tell the completion
// routine it's _NOT_ being woken up because of deactivate().
ULONG_PTR state_to_post;
state_to_post = ACE_Message_Queue_Base::ACTIVATED;
if (::PostQueuedCompletionStatus (this->completion_port_,
static_cast<DWORD> (msize),
state_to_post,
reinterpret_cast<LPOVERLAPPED> (new_item)))
{
// Update the states once I succeed.
this->cur_bytes_ += msize;
this->cur_length_ += mlength;
return ACE_Utils::Truncate (++this->cur_count_);
}
}
else
errno = ESHUTDOWN;
// Fail to enqueue the message.
return -1;
}
int
ACE_Message_Queue_NT::dequeue (ACE_Message_Block *&first_item,
ACE_Time_Value *timeout)
{
ACE_TRACE ("ACE_Message_Queue_NT::dequeue_head");
{
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
// Make sure the MQ is not deactivated before proceeding.
if (this->state_ == ACE_Message_Queue_Base::DEACTIVATED)
{
errno = ESHUTDOWN; // Operation on deactivated MQ not allowed.
return -1;
}
else
++this->cur_thrs_; // Increase the waiting thread count.
}
ULONG_PTR queue_state;
DWORD msize;
// Get a message from the completion port.
int retv = ::GetQueuedCompletionStatus (this->completion_port_,
&msize,
&queue_state,
reinterpret_cast<LPOVERLAPPED *> (&first_item),
(timeout == 0 ? INFINITE : timeout->msec ()));
{
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
--this->cur_thrs_; // Decrease waiting thread count.
if (retv)
{
if (queue_state == ACE_Message_Queue_Base::ACTIVATED)
{ // Really get a valid MB from the queue.
--this->cur_count_;
this->cur_bytes_ -= msize;
this->cur_length_ -= first_item->total_length ();
return ACE_Utils::Truncate (this->cur_count_);
}
else // Woken up by deactivate () or pulse ().
errno = ESHUTDOWN;
}
}
return -1;
}
int
ACE_Message_Queue_NT::deactivate (void)
{
ACE_TRACE ("ACE_Message_Queue_NT::deactivate");
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
int const previous_state = this->state_;
if (previous_state != ACE_Message_Queue_Base::DEACTIVATED)
{
this->state_ = ACE_Message_Queue_Base::DEACTIVATED;
// Get the number of shutdown messages necessary to wake up all
// waiting threads.
DWORD cntr =
this->cur_thrs_ - static_cast<DWORD> (this->cur_count_);
while (cntr-- > 0)
::PostQueuedCompletionStatus (this->completion_port_,
0,
this->state_,
0);
}
return previous_state;
}
int
ACE_Message_Queue_NT::activate (void)
{
ACE_TRACE ("ACE_Message_Queue_NT::activate");
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
int const previous_status = this->state_;
this->state_ = ACE_Message_Queue_Base::ACTIVATED;
return previous_status;
}
int
ACE_Message_Queue_NT::pulse (void)
{
ACE_TRACE ("ACE_Message_Queue_NT::pulse");
ACE_GUARD_RETURN (ACE_Thread_Mutex, ace_mon, this->lock_, -1);
int const previous_state = this->state_;
if (previous_state != ACE_Message_Queue_Base::DEACTIVATED)
{
this->state_ = ACE_Message_Queue_Base::PULSED;
// Get the number of shutdown messages necessary to wake up all
// waiting threads.
DWORD cntr =
this->cur_thrs_ - static_cast<DWORD> (this->cur_count_);
while (cntr-- > 0)
::PostQueuedCompletionStatus (this->completion_port_,
0,
this->state_,
0);
}
return previous_state;
}
void
ACE_Message_Queue_NT::dump (void) const
{
#if defined (ACE_HAS_DUMP)
ACE_TRACE ("ACE_Message_Queue_NT::dump");
ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
switch (this->state_)
{
case ACE_Message_Queue_Base::ACTIVATED:
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("state = ACTIVATED\n")));
break;
case ACE_Message_Queue_Base::DEACTIVATED:
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("state = DEACTIVATED\n")));
break;
case ACE_Message_Queue_Base::PULSED:
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("state = PULSED\n")));
break;
}
ACE_DEBUG ((LM_DEBUG,
ACE_LIB_TEXT ("max_cthrs_ = %d\n")
ACE_LIB_TEXT ("cur_thrs_ = %d\n")
ACE_LIB_TEXT ("cur_bytes = %d\n")
ACE_LIB_TEXT ("cur_length = %d\n")
ACE_LIB_TEXT ("cur_count = %d\n")
ACE_LIB_TEXT ("completion_port_ = %x\n"),
this->max_cthrs_,
this->cur_thrs_,
this->cur_bytes_,
this->cur_length_,
this->cur_count_,
this->completion_port_));
ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
#endif /* ACE_HAS_DUMP */
}
#endif /* ACE_WIN32 && ACE_HAS_WINNT4 != 0 */
ACE_END_VERSIONED_NAMESPACE_DECL
|