Patches to improve Hurd parts: generic verify.h and Hurd-specific fcntl-internal.h

[Thomas Schwinge]

Hello!

So, here is what I propose instead of changing include/sys/socket.h:

Add the gnulib verify.h (see my other email) to either a Hurd-specific
place or (preferably) a general place (and then avoid the duplication of
the verify macro in time/mktime.c, as well as using it in
iconvdata/cp1255.c, iconvdata/cp1258.c, and iconvdata/tcvn5712-1.c) and
add a Hurd-specific fcntl-internal.h (as follows).  I renamed the file to
emphasize the fcntl part (O_* flags), as more such conversions to and
from O_* flags may needed in the future.


Further trivial changes to my posted patches are needed, I can also
re-post them if desired.

socket.c: #include <fcntl-internal.h>

socketpair.c: #include <fcntl-internal.h>

accept4.c: #include <fcntl-internal.h>

pipe2.c:
#include <fcntl.h>
#include <fcntl-internal.h>
#include <hurd.h>


fcntl-intern.h follows.

/* Copyright (C) 2008 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */


#include <fcntl.h>
#include <sys/socket.h>
#include <verify.h>

/* Do some compile-time checks for the SOCK_* constants, which we rely on.  */
verify (SOCK_CLOEXEC == O_CLOEXEC);
verify ((SOCK_MAX | SOCK_TYPE_MASK) == SOCK_TYPE_MASK);
verify ((SOCK_CLOEXEC & SOCK_TYPE_MASK) == 0);
verify ((SOCK_NONBLOCK & SOCK_TYPE_MASK) == 0);


/* Helper functions for translating between O_* and SOCK_* flags.  */

__extern_always_inline
int
sock_to_o_flags (int in)
{
  int out = 0;

  if (in & SOCK_NONBLOCK)
    out |= O_NONBLOCK;
  /* Others are passed through unfiltered.  */
  out |= in & ~(SOCK_NONBLOCK);

  return out;
}

__extern_always_inline
int
o_to_sock_flags (int in)
{
  int out = 0;

  if (in & O_NONBLOCK)
    out |= SOCK_NONBLOCK;
  /* Others are passed through unfiltered.  */
  out |= in & ~(O_NONBLOCK);

  return out;
}


Regards,
 Thomas
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