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// MEM_IO.cpp
// $Id$
#define ACE_BUILD_DLL
#include "ace/MEM_IO.h"
#include "ace/Handle_Set.h"
#if defined (ACE_LACKS_INLINE_FUNCTIONS)
#include "ace/MEM_IO.i"
#endif /* ACE_LACKS_INLINE_FUNCTIONS */
ACE_RCSID(ace, MEM_IO, "$Id$")
ACE_ALLOC_HOOK_DEFINE(ACE_MEM_IO)
void
ACE_MEM_IO::dump (void) const
{
ACE_TRACE ("ACE_MEM_IO::dump");
}
// Allows a client to read from a socket without having to provide
// a buffer to read. This method determines how much data is in the
// socket, allocates a buffer of this size, reads in the data, and
// returns the number of bytes read.
ssize_t
ACE_MEM_IO::send (const ACE_Message_Block *message_block,
const ACE_Time_Value *timeout)
{
ACE_TRACE ("ACE_MEM_IO::send");
ssize_t len = message_block->total_length ();
if (len != 0)
{
char *buf = ACE_static_cast (char *, this->acquire_buffer (len));
ssize_t n = 0;
while (message_block != 0)
{
ACE_OS::memcpy (buf + n,
message_block->rd_ptr (),
message_block->length ());
n += message_block->length ();
if (message_block->cont ())
message_block = message_block->cont ();
else
message_block = message_block->next ();
}
off_t offset = this->set_buf_len (buf, len);
if (ACE::send (this->get_handle (),
(const char *) &offset,
sizeof (offset),
0,
timeout) != sizeof (offset))
{
// unsucessful send, release the memory in the shared-memory.
this->release_buffer (buf);
return -1;
}
return len;
}
return 0;
}
#if 0
ssize_t
ACE_MEM_IO::recvv (iovec *io_vec,
const ACE_Time_Value *timeout)
{
ACE_TRACE ("ACE_MEM_IO::recvv");
#if defined (FIONREAD)
ACE_Handle_Set handle_set;
handle_set.reset ();
handle_set.set_bit (this->get_handle ());
io_vec->iov_base = 0;
// Check the status of the current socket.
switch (ACE_OS::select (int (this->get_handle ()) + 1,
handle_set,
0, 0,
timeout))
{
case -1:
return -1;
/* NOTREACHED */
case 0:
errno = ETIME;
return -1;
/* NOTREACHED */
default:
// Goes fine, fallthrough to get data
break;
}
u_long inlen;
if (ACE_OS::ioctl (this->get_handle (),
FIONREAD,
(u_long *) &inlen) == -1)
return -1;
else if (inlen > 0)
{
ACE_NEW_RETURN (io_vec->iov_base,
char[inlen],
-1);
io_vec->iov_len = this->recv (io_vec->iov_base,
inlen);
return io_vec->iov_len;
}
else
return 0;
#else
ACE_UNUSED_ARG (io_vec);
ACE_UNUSED_ARG (timeout);
ACE_NOTSUP_RETURN (-1);
#endif /* FIONREAD */
}
// Send N char *ptrs and int lengths. Note that the char *'s precede
// the ints (basically, an varargs version of writev). The count N is
// the *total* number of trailing arguments, *not* a couple of the
// number of tuple pairs!
ssize_t
ACE_MEM_IO::send (size_t n, ...) const
{
ACE_TRACE ("ACE_MEM_IO::send");
va_list argp;
size_t total_tuples = n / 2;
iovec *iovp;
#if defined (ACE_HAS_ALLOCA)
iovp = (iovec *) alloca (total_tuples * sizeof (iovec));
#else
ACE_NEW_RETURN (iovp,
iovec[total_tuples],
-1);
#endif /* !defined (ACE_HAS_ALLOCA) */
va_start (argp, n);
for (size_t i = 0; i < total_tuples; i++)
{
iovp[i].iov_base = va_arg (argp, char *);
iovp[i].iov_len = va_arg (argp, ssize_t);
}
ssize_t result = ACE_OS::sendv (this->get_handle (),
iovp,
total_tuples);
#if !defined (ACE_HAS_ALLOCA)
delete [] iovp;
#endif /* !defined (ACE_HAS_ALLOCA) */
va_end (argp);
return result;
}
// This is basically an interface to ACE_OS::readv, that doesn't use
// the struct iovec_Base explicitly. The ... can be passed as an arbitrary
// number of (char *ptr, int len) tuples. However, the count N is the
// *total* number of trailing arguments, *not* a couple of the number
// of tuple pairs!
ssize_t
ACE_MEM_IO::recv (size_t n, ...) const
{
ACE_TRACE ("ACE_MEM_IO::recv");
va_list argp;
size_t total_tuples = n / 2;
iovec *iovp;
#if defined (ACE_HAS_ALLOCA)
iovp = (iovec *) alloca (total_tuples * sizeof (iovec));
#else
ACE_NEW_RETURN (iovp,
iovec[total_tuples],
-1);
#endif /* !defined (ACE_HAS_ALLOCA) */
va_start (argp, n);
for (size_t i = 0; i < total_tuples; i++)
{
iovp[i].iov_base = va_arg (argp, char *);
iovp[i].iov_len = va_arg (argp, ssize_t);
}
ssize_t result = ACE_OS::recvv (this->get_handle (),
iovp,
total_tuples);
#if !defined (ACE_HAS_ALLOCA)
delete [] iovp;
#endif /* !defined (ACE_HAS_ALLOCA) */
va_end (argp);
return result;
}
#endif /* 0 */
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