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04277e02 | 1 | /* Copyright (C) 2007-2019 Free Software Foundation, Inc. |
eab1bdfb UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
eab1bdfb | 17 | |
eab1bdfb UD |
18 | #include <sched.h> |
19 | ||
20 | ||
21 | int | |
36dffb22 | 22 | __sched_cpucount (size_t setsize, const cpu_set_t *setp) |
eab1bdfb UD |
23 | { |
24 | int s = 0; | |
36dffb22 UD |
25 | const __cpu_mask *p = setp->__bits; |
26 | const __cpu_mask *end = &setp->__bits[setsize / sizeof (__cpu_mask)]; | |
27 | ||
28 | while (p < end) | |
eab1bdfb | 29 | { |
36dffb22 | 30 | __cpu_mask l = *p++; |
eab1bdfb | 31 | |
7d0e41ce UD |
32 | #ifdef POPCNT |
33 | s += POPCNT (l); | |
34 | #else | |
36dffb22 UD |
35 | if (l == 0) |
36 | continue; | |
37 | ||
8dc6133e L |
38 | _Static_assert (sizeof (l) == sizeof (unsigned int) |
39 | || sizeof (l) == sizeof (unsigned long) | |
40 | || sizeof (l) == sizeof (unsigned long long), | |
41 | "sizeof (__cpu_mask"); | |
42 | if (sizeof (__cpu_mask) == sizeof (unsigned int)) | |
43 | s += __builtin_popcount (l); | |
44 | else if (sizeof (__cpu_mask) == sizeof (unsigned long)) | |
45 | s += __builtin_popcountl (l); | |
46 | else | |
47 | s += __builtin_popcountll (l); | |
7d0e41ce | 48 | #endif |
eab1bdfb UD |
49 | } |
50 | ||
51 | return s; | |
52 | } |