| /* Helper functions for translating between O_* and SOCK_* flags. |
| Copyright (C) 2008-2018 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; |
| } |