TAO: Block_Flushing_Strategy.cpp Source File

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00001 // $Id: Block_Flushing_Strategy.cpp 85817 2009-06-26 20:44:58Z mitza $
00002 
00003 #include "tao/Block_Flushing_Strategy.h"
00004 #include "tao/Transport.h"
00005 #include "tao/Queued_Message.h"
00006 #include "tao/Connection_Handler.h"
00007 #include "ace/Countdown_Time.h"
00008 
00009 ACE_RCSID(tao, Block_Flushing_Strategy, "$Id: Block_Flushing_Strategy.cpp 85817 2009-06-26 20:44:58Z mitza $")
00010 
00011 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
00012 
00013 int
00014 TAO_Block_Flushing_Strategy::schedule_output (TAO_Transport *)
00015 {
00016   return MUST_FLUSH;
00017 }
00018 
00019 int
00020 TAO_Block_Flushing_Strategy::cancel_output (TAO_Transport *)
00021 {
00022   return 0;
00023 }
00024 
00025 int
00026 TAO_Block_Flushing_Strategy::call_handle_output (TAO_Transport *transport,
00027     const TAO::Transport::Drain_Constraints &dc)
00028 {
00029   switch (transport->handle_output (dc).dre_)
00030     {
00031     case TAO_Transport::DR_ERROR: return -1;
00032     case TAO_Transport::DR_QUEUE_EMPTY: // won't happen, fall-through anyway
00033     case TAO_Transport::DR_OK: return 0;
00034     case TAO_Transport::DR_WOULDBLOCK:
00035       {
00036         ACE_Countdown_Time counter (dc.timeout ());
00037         TAO_Connection_Handler &ch = *transport->connection_handler ();
00038         if (ch.handle_write_ready (dc.timeout ()) == -1)
00039           {
00040             return -1;
00041           }
00042         return 0;
00043       }
00044     }
00045   return 0;
00046 }
00047 
00048 int
00049 TAO_Block_Flushing_Strategy::flush_message (TAO_Transport *transport,
00050                                             TAO_Queued_Message *msg,
00051                                             ACE_Time_Value *max_wait_time)
00052 {
00053   TAO::Transport::Drain_Constraints dc (max_wait_time, true);
00054   while (!msg->all_data_sent ())
00055     {
00056       if (this->call_handle_output (transport, dc) == -1)
00057         return -1;
00058     }
00059   return 0;
00060 }
00061 
00062 int
00063 TAO_Block_Flushing_Strategy::flush_transport (TAO_Transport *transport,
00064                                               ACE_Time_Value *max_wait_time)
00065 {
00066   TAO::Transport::Drain_Constraints dc (max_wait_time, true);
00067   while (!transport->queue_is_empty ())
00068     {
00069       if (this->call_handle_output (transport, dc) == -1)
00070         return -1;
00071     }
00072   return 0;
00073 }
00074 
00075 TAO_END_VERSIONED_NAMESPACE_DECL