| 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 */ |