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/* Helper functions for translating between O_* and SOCK_* flags.
Copyright (C) 2008-2020 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, see
<https://www.gnu.org/licenses/>. */
#include <fcntl.h>
#include <sys/socket.h>
/* Do some compile-time checks for the SOCK_* constants, which we rely on. */
_Static_assert (SOCK_CLOEXEC == O_CLOEXEC,
"SOCK_CLOEXEC is assumed to be the same as O_CLOEXEC");
_Static_assert (((SOCK_MAX - 1) | SOCK_TYPE_MASK) == SOCK_TYPE_MASK,
"SOCK_TYPE_MASK must contain SOCK_MAX - 1");
_Static_assert ((SOCK_CLOEXEC & SOCK_TYPE_MASK) == 0,
"SOCK_TYPE_MASK must not contain SOCK_CLOEXEC");
_Static_assert ((SOCK_NONBLOCK & SOCK_TYPE_MASK) == 0,
"SOCK_TYPE_MASK must not contain SOCK_NONBLOCK");
/* Convert from SOCK_* flags to O_* 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;
}
/* Convert from O_* flags to SOCK_* flags. */
__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;
}
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