glibc/sysdeps/unix/sysv/linux/mmap_internal.h
Paul Eggert 2b778ceb40 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 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

50 lines
1.7 KiB
C

/* Common mmap definition for Linux implementation.
Copyright (C) 2017-2021 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/>. */
#ifndef MMAP_INTERNAL_LINUX_H
#define MMAP_INTERNAL_LINUX_H 1
/* This is the minimum mmap2 unit size accept by the kernel. An architecture
with multiple minimum page sizes (such as m68k) might define it as -1 and
thus it will queried at runtime. */
#ifndef MMAP2_PAGE_UNIT
# define MMAP2_PAGE_UNIT 4096ULL
#endif
#if MMAP2_PAGE_UNIT == -1
static uint64_t page_unit;
# define MMAP_CHECK_PAGE_UNIT() \
if (page_unit == 0) \
page_unit = __getpagesize ();
# undef MMAP2_PAGE_UNIT
# define MMAP2_PAGE_UNIT page_unit
#else
# define MMAP_CHECK_PAGE_UNIT()
#endif
/* Do not accept offset not multiple of page size. */
#define MMAP_OFF_LOW_MASK (MMAP2_PAGE_UNIT - 1)
/* An architecture may override this. */
#ifndef MMAP_CALL
# define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
#endif
#endif /* MMAP_INTERNAL_LINUX_H */