// -*- C++ -*-
#include "ace/Global_Macros.h"
#include "ace/OS_NS_sys_msg.h"

ACE_BEGIN_VERSIONED_NAMESPACE_DECL

// Open a message queue using the <external_id>.

ACE_INLINE int
ACE_SV_Message_Queue::open (key_t external_id, int create, int perms)
{
  ACE_TRACE ("ACE_SV_Message_Queue::open");
  return this->internal_id_ = ACE_OS::msgget (external_id, create | perms);
}

// What does it mean to close a message queue?!

ACE_INLINE int
ACE_SV_Message_Queue::close (void)
{
  ACE_TRACE ("ACE_SV_Message_Queue::close");
  this->internal_id_ = -1;
  return 1;
}

ACE_INLINE int
ACE_SV_Message_Queue::control (int option, void *arg)
{
  ACE_TRACE ("ACE_SV_Message_Queue::control");
  return ACE_OS::msgctl (this->internal_id_, option,
                         (struct msqid_ds *) arg);
}

ACE_INLINE int
ACE_SV_Message_Queue::remove (void)
{
  ACE_TRACE ("ACE_SV_Message_Queue::remove");
  int const result = this->control (IPC_RMID);
  this->internal_id_ = -1;
  return result;
}

ACE_INLINE int
ACE_SV_Message_Queue::get_id (void) const
{
  ACE_TRACE ("ACE_SV_Message_Queue::get_id");
  return this->internal_id_;
}

ACE_INLINE void
ACE_SV_Message_Queue::set_id (int id)
{
  ACE_TRACE ("ACE_SV_Message_Queue::set_id");
  this->internal_id_ = id;
}

ACE_INLINE ssize_t
ACE_SV_Message_Queue::recv (ACE_SV_Message &mb,
                            int length,
                            long type,
                            int mflags)
{
  ACE_TRACE ("ACE_SV_Message_Queue::recv");
  return ACE_OS::msgrcv (this->internal_id_, (void *) &mb,
                         length, type, mflags);
}

ACE_INLINE int
ACE_SV_Message_Queue::send (const ACE_SV_Message &mb,
                            int length,
                            int mflags)
{
  ACE_TRACE ("ACE_SV_Message_Queue::send");
  return ACE_OS::msgsnd (this->internal_id_, (void *) &mb,
                         length, mflags);
}

ACE_END_VERSIONED_NAMESPACE_DECL
