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// -*- C++ -*-
//
// $Id$
// FIFO_Recv_Msg.i
#include "ace/Min_Max.h"
#include "ace/OS_NS_stropts.h"
#if !defined (ACE_HAS_STREAM_PIPES)
#include "ace/OS_NS_unistd.h"
#endif
ACE_INLINE ssize_t
ACE_FIFO_Recv_Msg::recv (ACE_Str_Buf &recv_msg)
{
ACE_TRACE ("ACE_FIFO_Recv_Msg::recv");
#if defined (ACE_HAS_STREAM_PIPES)
int i = 0;
if (ACE_OS::getmsg (this->get_handle (),
(strbuf *) 0,
(strbuf *) &recv_msg,
&i) == -1)
return -1;
else
return recv_msg.len;
#else /* Do the ol' 2-read trick... */
if (ACE_OS::read (this->get_handle (),
(char *) &recv_msg.len,
sizeof recv_msg.len) != sizeof recv_msg.len)
return -1;
else
{
size_t remaining = static_cast<size_t> (recv_msg.len);
size_t requested = static_cast<size_t> (recv_msg.maxlen);
ssize_t recv_len = ACE_OS::read (this->get_handle (),
(char *) recv_msg.buf,
ACE_MIN (remaining, requested));
if (recv_len == -1)
return -1;
// Tell caller what's really in the buffer.
recv_msg.len = static_cast<int> (recv_len);
// If there are more bytes remaining in the message, read them and
// throw them away. Leaving them in the FIFO would make it difficult
// to find the start of the next message in the fifo.
// Since the ACE_HAS_STREAM_PIPES version of this method doesn't
// return getmsg()'s indication of "data remaining", don't worry about
// saving the indication here either to read the remainder later.
size_t total_msg_size = remaining;
remaining -= recv_len;
while (remaining > 0)
{
const size_t throw_away = 1024;
char dev_null[throw_away];
recv_len = ACE_OS::read (this->get_handle (),
dev_null,
ACE_MIN (remaining, throw_away));
if (recv_len == -1)
break;
remaining -= recv_len;
}
return total_msg_size;
}
#endif /* ACE_HAS_STREAM_PIPES */
}
ACE_INLINE ssize_t
ACE_FIFO_Recv_Msg::recv (void *buf, size_t max_len)
{
ACE_TRACE ("ACE_FIFO_Recv_Msg::recv");
ACE_Str_Buf recv_msg ((char *) buf, 0, static_cast<int> (max_len));
return this->recv (recv_msg);
}
#if defined (ACE_HAS_STREAM_PIPES)
ACE_INLINE ssize_t
ACE_FIFO_Recv_Msg::recv (ACE_Str_Buf *data,
ACE_Str_Buf *cntl,
int *flags)
{
ACE_TRACE ("ACE_FIFO_Recv_Msg::recv");
if (ACE_OS::getmsg (this->get_handle (),
(strbuf *) cntl,
(strbuf *) data,
flags) == -1)
return -1;
else
return (cntl == 0 ? 0 : cntl->len) + (data == 0 ? 0 : data->len);
}
ACE_INLINE ssize_t
ACE_FIFO_Recv_Msg::recv (int *band,
ACE_Str_Buf *data,
ACE_Str_Buf *cntl,
int *flags)
{
ACE_TRACE ("ACE_FIFO_Recv_Msg::recv");
if (ACE_OS::getpmsg (this->get_handle (),
(strbuf *) cntl,
(strbuf *) data,
band,
flags) == -1)
return -1;
else
return (cntl == 0 ? 0 : cntl->len) + (data == 0 ? 0 : data->len);
}
#endif /* ACE_HAS_STREAM_PIPES */
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