glibc/sysdeps/unix/sysv/linux/mlock2.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

39 lines
1.3 KiB
C

/* Wrapper for the mlock2 system call with fallback to mlock.
Copyright (C) 2017-2022 Free Software Foundation, Inc.
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 <sys/mman.h>
#include <errno.h>
#include <sysdep.h>
int
mlock2 (const void *addr, size_t length, unsigned int flags)
{
#ifdef __ASSUME_MLOCK2
return INLINE_SYSCALL_CALL (mlock2, addr, length, flags);
#else
if (flags == 0)
return INLINE_SYSCALL_CALL (mlock, addr, length);
int ret = INLINE_SYSCALL_CALL (mlock2, addr, length, flags);
if (ret == 0 || errno != ENOSYS)
return ret;
/* Treat the missing system call as an invalid (non-zero) flag
argument. */
__set_errno (EINVAL);
return -1;
#endif /* __ASSUME_MLOCK2 */
}