diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/bitmap.h')
| -rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/bitmap.h | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/bitmap.h b/drivers/staging/lustre/include/linux/libcfs/bitmap.h index f3d4a896a75a..8b137891791f 100644 --- a/drivers/staging/lustre/include/linux/libcfs/bitmap.h +++ b/drivers/staging/lustre/include/linux/libcfs/bitmap.h @@ -1,111 +1 @@ -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program 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 - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf - * - * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, - * CA 95054 USA or visit www.sun.com if you need additional information or - * have any questions. - * - * GPL HEADER END - */ -/* - * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2012, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - */ -#ifndef _LIBCFS_BITMAP_H_ -#define _LIBCFS_BITMAP_H_ - -typedef struct { - int size; - unsigned long data[0]; -} cfs_bitmap_t; - -#define CFS_BITMAP_SIZE(nbits) \ - (((nbits/BITS_PER_LONG)+1)*sizeof(long)+sizeof(cfs_bitmap_t)) - -static inline -cfs_bitmap_t *CFS_ALLOCATE_BITMAP(int size) -{ - cfs_bitmap_t *ptr; - - OBD_ALLOC(ptr, CFS_BITMAP_SIZE(size)); - if (ptr == NULL) - return ptr; - - ptr->size = size; - - return ptr; -} - -#define CFS_FREE_BITMAP(ptr) OBD_FREE(ptr, CFS_BITMAP_SIZE(ptr->size)) - -static inline -void cfs_bitmap_set(cfs_bitmap_t *bitmap, int nbit) -{ - set_bit(nbit, bitmap->data); -} - -static inline -void cfs_bitmap_clear(cfs_bitmap_t *bitmap, int nbit) -{ - test_and_clear_bit(nbit, bitmap->data); -} - -static inline -int cfs_bitmap_check(cfs_bitmap_t *bitmap, int nbit) -{ - return test_bit(nbit, bitmap->data); -} - -static inline -int cfs_bitmap_test_and_clear(cfs_bitmap_t *bitmap, int nbit) -{ - return test_and_clear_bit(nbit, bitmap->data); -} - -/* return 0 is bitmap has none set bits */ -static inline -int cfs_bitmap_check_empty(cfs_bitmap_t *bitmap) -{ - return find_first_bit(bitmap->data, bitmap->size) == bitmap->size; -} - -static inline -void cfs_bitmap_copy(cfs_bitmap_t *new, cfs_bitmap_t *old) -{ - int newsize; - - LASSERT(new->size >= old->size); - newsize = new->size; - memcpy(new, old, CFS_BITMAP_SIZE(old->size)); - new->size = newsize; -} - -#define cfs_foreach_bit(bitmap, pos) \ - for ((pos) = find_first_bit((bitmap)->data, bitmap->size); \ - (pos) < (bitmap)->size; \ - (pos) = find_next_bit((bitmap)->data, (bitmap)->size, (pos) + 1)) - -#endif |