From a979b72747e34add3433a23c0966490cd809120f Mon Sep 17 00:00:00 2001 From: Sergey Bugaev Date: Mon, 30 Jan 2023 15:52:16 +0300 Subject: 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 Message-Id: <20230130125216.6254-4-bugaevc@gmail.com> --- sysdeps/mach/hurd/bits/mman_ext.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 sysdeps/mach/hurd/bits/mman_ext.h (limited to 'sysdeps') diff --git a/sysdeps/mach/hurd/bits/mman_ext.h b/sysdeps/mach/hurd/bits/mman_ext.h new file mode 100644 index 0000000000..f022826eee --- /dev/null +++ b/sysdeps/mach/hurd/bits/mman_ext.h @@ -0,0 +1,25 @@ +/* System-specific extensions of , 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 + . */ + +#ifndef _SYS_MMAN_H +# error "Never include directly; use instead." +#endif + +#ifdef __USE_GNU +# define SHM_ANON ((const char *) 1) +#endif /* __USE_GNU */ -- cgit 1.4.1