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1 | /* |
2 | * lttng/counter.h | |
3 | * | |
4 | * LTTng Counters API | |
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_H | |
28 | #define _LTTNG_COUNTER_H | |
29 | ||
30 | #include <stdint.h> | |
31 | #include <lttng/ust-config.h> | |
32 | #include "counter-types.h" | |
33 | ||
34 | /* max_nr_elem is for each dimension. */ | |
35 | struct lib_counter *lttng_counter_create(const struct lib_counter_config *config, | |
36 | size_t nr_dimensions, | |
37 | const size_t *max_nr_elem, | |
38 | int64_t global_sum_step, | |
39 | int global_counter_fd, | |
40 | int nr_counter_cpu_fds, | |
41 | const int *counter_cpu_fds, | |
42 | bool is_daemon); | |
43 | void lttng_counter_destroy(struct lib_counter *counter); | |
44 | ||
45 | int lttng_counter_set_global_shm(struct lib_counter *counter, int fd); | |
46 | int lttng_counter_set_cpu_shm(struct lib_counter *counter, int cpu, int fd); | |
47 | ||
48 | int lttng_counter_get_global_shm(struct lib_counter *counter, int *fd, size_t *len); | |
49 | int lttng_counter_get_cpu_shm(struct lib_counter *counter, int cpu, int *fd, size_t *len); | |
50 | ||
51 | int lttng_counter_read(const struct lib_counter_config *config, | |
52 | struct lib_counter *counter, | |
53 | const size_t *dimension_indexes, | |
54 | int cpu, int64_t *value, | |
55 | bool *overflow, bool *underflow); | |
56 | int lttng_counter_aggregate(const struct lib_counter_config *config, | |
57 | struct lib_counter *counter, | |
58 | const size_t *dimension_indexes, | |
59 | int64_t *value, | |
60 | bool *overflow, bool *underflow); | |
61 | int lttng_counter_clear(const struct lib_counter_config *config, | |
62 | struct lib_counter *counter, | |
63 | const size_t *dimension_indexes); | |
64 | ||
65 | #endif /* _LTTNG_COUNTER_H */ |