diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/container_of.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/container_of.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/container_of.h b/sys/compat/linuxkpi/common/include/linux/container_of.h new file mode 100644 index 000000000000..7210d531b055 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/container_of.h @@ -0,0 +1,54 @@ +/*- + * Copyright (c) 2010 Isilon Systems, Inc. + * Copyright (c) 2010 iX Systems, Inc. + * Copyright (c) 2010 Panasas, Inc. + * Copyright (c) 2017 Matt Macy <mmacy@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _LINUXKPI_LINUX_CONTAINER_OF_H +#define _LINUXKPI_LINUX_CONTAINER_OF_H + +#include <sys/stdint.h> + +#include <linux/build_bug.h> +#include <linux/stddef.h> + +#define container_of(ptr, type, member) \ +({ \ + const __typeof(((type *)0)->member) *__p = (ptr); \ + (type *)((uintptr_t)__p - offsetof(type, member)); \ +}) + +#define container_of_const(ptr, type, member) \ + _Generic(ptr, \ + const typeof(*(ptr)) *: \ + (const type *)container_of(ptr, type, member), \ + default: \ + container_of(ptr, type, member) \ + ) + +#define typeof_member(type, member) __typeof(((type *)0)->member) + +#endif |