ChangeLogTag:Thu Feb 10 13:49:34 2000 Nanbor Wang <nanbor@cs.wustl.edu>

1 files changed, 160 insertions, 0 deletions

diff --git a/ace/MEM_IO.cpp b/ace/MEM_IO.cpp
new file mode 100644
index 00000000000..3b0b8867043
--- /dev/null
+++ b/ace/MEM_IO.cpp
@@ -0,0 +1,160 @@
+// 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.
+
+#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 */