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1 | /* |
2 | * counter/counter-internal.h | |
3 | * | |
4 | * LTTng Counters Internal Header | |
5 | * | |
6 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7 | * | |
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: | |
14 | * | |
15 | * The above copyright notice and this permission notice shall be included in | |
16 | * all copies or substantial portions of the Software. | |
17 | * | |
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 | |
24 | * SOFTWARE. | |
25 | */ | |
26 | ||
27 | #ifndef _LTTNG_COUNTER_INTERNAL_H | |
28 | #define _LTTNG_COUNTER_INTERNAL_H | |
29 | ||
30 | #include <stdint.h> | |
31 | #include <lttng/ust-config.h> | |
32 | #include <urcu/compiler.h> | |
33 | #include "counter-types.h" | |
34 | ||
35 | static inline int lttng_counter_validate_indexes(const struct lib_counter_config *config, | |
36 | struct lib_counter *counter, | |
37 | const size_t *dimension_indexes) | |
38 | { | |
39 | size_t nr_dimensions = counter->nr_dimensions, i; | |
40 | ||
41 | for (i = 0; i < nr_dimensions; i++) { | |
42 | if (caa_unlikely(dimension_indexes[i] >= counter->dimensions[i].max_nr_elem)) | |
43 | return -EOVERFLOW; | |
44 | } | |
45 | return 0; | |
46 | } | |
47 | ||
48 | ||
49 | static inline size_t lttng_counter_get_index(const struct lib_counter_config *config, | |
50 | struct lib_counter *counter, | |
51 | const size_t *dimension_indexes) | |
52 | { | |
53 | size_t nr_dimensions = counter->nr_dimensions, i; | |
54 | size_t index = 0; | |
55 | ||
56 | for (i = 0; i < nr_dimensions; i++) { | |
57 | struct lib_counter_dimension *dimension = &counter->dimensions[i]; | |
58 | const size_t *dimension_index = &dimension_indexes[i]; | |
59 | ||
60 | index += *dimension_index * dimension->stride; | |
61 | } | |
62 | return index; | |
63 | } | |
64 | ||
65 | #endif /* _LTTNG_COUNTER_INTERNAL_H */ |