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| author | Sergey Bugaev <bugaevc@gmail.com> | 2023-01-30 15:52:16 +0300 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-02-01 23:36:11 +0100 |
| commit | a979b72747e34add3433a23c0966490cd809120f (patch) | |
| tree | 45d4888dc9ee62a8d851dc27b435516f827718b5 /sysdeps | |
| parent | 65392c84782a53b0d7705ca0207c95c3da41c7dc (diff) | |
| download | glibc-a979b72747e34add3433a23c0966490cd809120f.zip glibc-a979b72747e34add3433a23c0966490cd809120f.tar.gz glibc-a979b72747e34add3433a23c0966490cd809120f.tar.bz2 | |
hurd: Implement SHM_ANON
This adds a special SHM_ANON value that can be passed into shm_open ()
in place of a name. When called in this way, shm_open () will create a
new anonymous shared memory file. The file will be created in the same
way that other shared memory files are created (i.e., under /dev/shm/),
except that it is not given a name and therefore cannot be reached from
the file system, nor by other calls to shm_open (). This is accomplished
by utilizing O_TMPFILE.
This is intended to be compatible with FreeBSD's API of the same name.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230130125216.6254-4-bugaevc@gmail.com>
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/mach/hurd/bits/mman_ext.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/bits/mman_ext.h b/sysdeps/mach/hurd/bits/mman_ext.h new file mode 100644 index 0000000..f022826 --- /dev/null +++ b/sysdeps/mach/hurd/bits/mman_ext.h @@ -0,0 +1,25 @@ +/* System-specific extensions of <sys/mman.h>, Hurd version. + Copyright (C) 2022 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 _SYS_MMAN_H +# error "Never include <bits/mman_ext.h> directly; use <sys/mman.h> instead." +#endif + +#ifdef __USE_GNU +# define SHM_ANON ((const char *) 1) +#endif /* __USE_GNU */ |