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-rw-r--r--hurd/fcntl-internal.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/hurd/fcntl-internal.h b/hurd/fcntl-internal.h
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+/* 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;
+}