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version 3.0

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Bramfeld Team 2015-08-31 14:01:44 +02:00
commit d837490606
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io/sink_filter.cc Normal file
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////////////////////////////////////////////////////////////////////////////////
// //
// File: sink_filter.cc //
// Description: a filter to write into a target device //
// Project: WANProxy XTech //
// Author: Andreu Vidal Bramfeld-Software //
// Last modified: 2015-04-01 //
// //
////////////////////////////////////////////////////////////////////////////////
#include <unistd.h>
#include <sys/errno.h>
#include "sink_filter.h"
SinkFilter::SinkFilter (const LogHandle& log, Socket* sck, bool cln) : BufferedFilter (log)
{
sink_ = sck; write_action_ = 0; client_ = cln, down_ = closing_ = false;
}
SinkFilter::~SinkFilter ()
{
if (write_action_) write_action_->cancel ();
}
bool SinkFilter::consume (Buffer& buf)
{
if (! sink_ || closing_)
return false;
if (write_action_)
pending_.append (buf);
else
write_action_ = sink_->write (buf, callback (this, &SinkFilter::write_complete));
return (write_action_ != 0);
}
void SinkFilter::write_complete (Event e)
{
if (write_action_)
write_action_->cancel (), write_action_ = 0;
switch (e.type_)
{
case Event::Done:
if (! pending_.empty ())
{
write_action_ = sink_->write (pending_, callback (this, &SinkFilter::write_complete));
pending_.clear ();
}
else if (flushing_)
flush (0);
break;
case Event::Error:
if (e.error_ == EPIPE && client_)
DEBUG(log_) << "Client closed connection";
else
ERROR(log_) << "Write failed: " << e;
closing_ = true;
break;
}
}
void SinkFilter::flush (int flg)
{
flushing_ = true;
flush_flags_ |= flg;
if (flushing_ && ! write_action_)
{
if (! down_)
down_ = (sink_->shutdown (false, true) == 0);
Filter::flush (flush_flags_);
}
}