text: // $Id: IO_SAP.cpp 93736 2011-04-05 12:38:35Z johnnyw $
  
  #include "ace/IO_SAP.h"
  
  #include "ace/Log_Msg.h"
  #include "ace/OS_NS_unistd.h"
  #include "ace/OS_NS_errno.h"
  #include "ace/OS_NS_fcntl.h"
  #include "ace/os_include/os_signal.h"
  
  #if !defined (__ACE_INLINE__)
  #include "ace/IO_SAP.inl"
  #endif /* __ACE_INLINE__ */
  
  ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  
  ACE_ALLOC_HOOK_DEFINE(ACE_IO_SAP)
  
  // This is the do-nothing constructor.  It does not perform a
  // ACE_OS::open system call.
  
  ACE_IO_SAP::ACE_IO_SAP (void)
    : handle_ (ACE_INVALID_HANDLE)
  {
    ACE_TRACE ("ACE_IO_SAP::ACE_IO_SAP");
  }
  
  void
  ACE_IO_SAP::dump (void) const
  {
  #if defined (ACE_HAS_DUMP)
    ACE_TRACE ("ACE_IO_SAP::dump");
  
    ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
    ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("handle_ = %d"), this->handle_));
    ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("\npid_ = %d"), this->pid_));
    ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
  #endif /* ACE_HAS_DUMP */
  }
  
  // Cache for the process ID.
  pid_t ACE_IO_SAP::pid_ = 0;
  
  int
  ACE_IO_SAP::enable (int value) const
  {
    ACE_TRACE ("ACE_IO_SAP::enable");
    /* First-time in initialization. */
    if (ACE_IO_SAP::pid_ == 0)
      ACE_IO_SAP::pid_ = ACE_OS::getpid ();
  
    switch (value)
      {
  #if defined (SIGURG)
      case SIGURG:
      case ACE_SIGURG:
  #if defined (F_SETOWN)
        return ACE_OS::fcntl (this->handle_,
                              F_SETOWN,
                              ACE_IO_SAP::pid_);
  #else
        ACE_NOTSUP_RETURN (-1);
  #endif /* F_SETOWN */
  #endif /* SIGURG */
  #if defined (SIGIO)
      case SIGIO:
      case ACE_SIGIO:
  #if defined (F_SETOWN) && defined (FASYNC)
        if (ACE_OS::fcntl (this->handle_,
                           F_SETOWN,
                           ACE_IO_SAP::pid_) == -1
            || ACE::set_flags (this->handle_,
                               FASYNC) == -1)
          return -1;
        break;
  #else
        ACE_NOTSUP_RETURN (-1);
  #endif /* F_SETOWN && FASYNC */
  #else  // <==
        ACE_NOTSUP_RETURN (-1);
  #endif /* SIGIO <== */
      case ACE_NONBLOCK:
        if (ACE::set_flags (this->handle_,
                            ACE_NONBLOCK) == -1)
          return -1;
        break;
      default:
        return -1;
      }
  
    return 0;
  }
  
  int
  ACE_IO_SAP::disable (int value) const
  {
    ACE_TRACE ("ACE_IO_SAP::disable");
  
    switch (value)
      {
  #if defined (SIGURG)
      case SIGURG:
      case ACE_SIGURG:
  #if defined (F_SETOWN)
        if (ACE_OS::fcntl (this->handle_,
                           F_SETOWN, 0) == -1)
          return -1;
        break;
  #else
        ACE_NOTSUP_RETURN (-1);
  #endif /* F_SETOWN */
  #endif /* SIGURG */
  #if defined (SIGIO)
      case SIGIO:
      case ACE_SIGIO:
  #if defined (F_SETOWN) && defined (FASYNC)
        if (ACE_OS::fcntl (this->handle_,
                           F_SETOWN,
                           0) == -1
            || ACE::clr_flags (this->handle_, FASYNC) == -1)
          return -1;
        break;
  #else
        ACE_NOTSUP_RETURN (-1);
  #endif /* F_SETOWN && FASYNC */
  #else  // <==
        ACE_NOTSUP_RETURN (-1);
  #endif /* SIGIO <== */
      case ACE_NONBLOCK:
        if (ACE::clr_flags (this->handle_,
                                       ACE_NONBLOCK) == -1)
          return -1;
        break;
      default:
        return -1;
      }
    return 0;
  }
  
  ACE_END_VERSIONED_NAMESPACE_DECL
  