6 * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 #ifndef _LTTNG_BITMAP_H
28 #define _LTTNG_BITMAP_H
30 #include <urcu/compiler.h>
31 #include <urcu/system.h>
32 #include <urcu/uatomic.h>
35 static inline void lttng_bitmap_index(unsigned int index
, unsigned int *word
,
38 *word
= index
/ CAA_BITS_PER_LONG
;
39 *bit
= index
% CAA_BITS_PER_LONG
;
42 static inline void lttng_bitmap_set_bit(unsigned int index
, unsigned long *p
)
44 unsigned int word
, bit
;
47 lttng_bitmap_index(index
, &word
, &bit
);
49 uatomic_or(p
+ word
, val
);
52 static inline void lttng_bitmap_clear_bit(unsigned int index
, unsigned long *p
)
54 unsigned int word
, bit
;
57 lttng_bitmap_index(index
, &word
, &bit
);
59 uatomic_and(p
+ word
, val
);
62 static inline bool lttng_bitmap_test_bit(unsigned int index
, unsigned long *p
)
64 unsigned int word
, bit
;
66 lttng_bitmap_index(index
, &word
, &bit
);
67 return (CMM_LOAD_SHARED(p
[word
]) >> bit
) & 0x1;
70 #endif /* _LTTNG_BITMAP_H */
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