1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* Copyright (c) 2019-2019 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _OFI_BITMASK_H_
#define _OFI_BITMASK_H_
#include <rdma/fi_errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
struct ofi_bitmask {
size_t size;
uint8_t *bytes;
};
static inline int ofi_bitmask_create(struct ofi_bitmask *mask, size_t size)
{
size_t byte_size = size / 8;
if (byte_size % 8)
byte_size++;
mask->bytes = calloc(byte_size, 1);
if (!mask->bytes)
return -FI_ENOMEM;
mask->size = size;
return FI_SUCCESS;
}
static inline void ofi_bitmask_free(struct ofi_bitmask *mask)
{
free(mask->bytes);
mask->bytes = NULL;
}
static inline size_t ofi_bitmask_bytesize(struct ofi_bitmask *mask)
{
return (mask->size % 8) ? (mask->size / 8 + 1) : (mask->size / 8);
}
static inline void ofi_bitmask_unset(struct ofi_bitmask *mask, size_t idx)
{
assert(idx <= mask->size);
mask->bytes[idx / 8] &= ~(0x01 << (idx % 8));
}
static inline void ofi_bitmask_set(struct ofi_bitmask *mask, size_t idx)
{
assert(idx <= mask->size);
mask->bytes[idx / 8] |= (0x01 << (idx % 8));
}
static inline void ofi_bitmask_set_all(struct ofi_bitmask *mask)
{
memset(mask->bytes, 0xff, ofi_bitmask_bytesize(mask));
}
static inline size_t ofi_bitmask_get_lsbset(struct ofi_bitmask mask)
{
size_t cur;
uint8_t tmp;
size_t ret = 0;
for (cur = 0; cur < (mask.size/8); cur++) {
if (mask.bytes[cur]) {
tmp = mask.bytes[cur];
while (!(tmp & 0x1)) {
tmp >>= 1;
ret++;
}
break;
} else {
ret += 8;
}
}
assert(ret <= (mask.size));
return ret;
}
#endif
|
