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1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
2 | * | |
3 | * counter/counter-internal.h | |
4 | * | |
5 | * LTTng Counters Internal Header | |
6 | * | |
7 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | */ | |
9 | ||
10 | #ifndef _LTTNG_COUNTER_INTERNAL_H | |
11 | #define _LTTNG_COUNTER_INTERNAL_H | |
12 | ||
13 | #include <linux/types.h> | |
14 | #include <linux/percpu.h> | |
15 | #include <counter/counter-types.h> | |
16 | #include <counter/config.h> | |
17 | ||
18 | static inline int lttng_counter_validate_indexes(const struct lib_counter_config *config, | |
19 | struct lib_counter *counter, | |
20 | const size_t *dimension_indexes) | |
21 | { | |
22 | size_t nr_dimensions = counter->nr_dimensions, i; | |
23 | ||
24 | for (i = 0; i < nr_dimensions; i++) { | |
25 | if (unlikely(dimension_indexes[i] >= counter->dimensions[i].max_nr_elem)) | |
26 | return -EOVERFLOW; | |
27 | } | |
28 | return 0; | |
29 | } | |
30 | ||
31 | static inline size_t lttng_counter_get_index(const struct lib_counter_config *config, | |
32 | struct lib_counter *counter, | |
33 | const size_t *dimension_indexes) | |
34 | { | |
35 | size_t nr_dimensions = counter->nr_dimensions, i; | |
36 | size_t index = 0; | |
37 | ||
38 | for (i = 0; i < nr_dimensions; i++) { | |
39 | struct lib_counter_dimension *dimension = &counter->dimensions[i]; | |
40 | const size_t *dimension_index = &dimension_indexes[i]; | |
41 | ||
42 | index += *dimension_index * dimension->stride; | |
43 | } | |
44 | return index; | |
45 | } | |
46 | ||
47 | #endif /* _LTTNG_COUNTER_INTERNAL_H */ |