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ebabbf58 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: MIT |
ebabbf58 MD |
3 | * |
4 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
c0c0989a | 6 | * LTTng Counters Types |
ebabbf58 MD |
7 | */ |
8 | ||
9 | #ifndef _LTTNG_COUNTER_TYPES_H | |
10 | #define _LTTNG_COUNTER_TYPES_H | |
11 | ||
12 | #include <stdint.h> | |
13 | #include <stddef.h> | |
14 | #include <stdbool.h> | |
15 | #include <sys/types.h> | |
9f25e892 | 16 | #include "counter-config.h" |
ebabbf58 MD |
17 | #include <lttng/ust-config.h> |
18 | #include "shm_types.h" | |
19 | ||
20 | struct lib_counter_dimension { | |
21 | /* | |
22 | * Max. number of indexable elements. | |
23 | */ | |
24 | size_t max_nr_elem; | |
25 | /* | |
26 | * The stride for a dimension is the multiplication factor which | |
27 | * should be applied to its index to take into account other | |
28 | * dimensions nested inside. | |
29 | */ | |
30 | size_t stride; | |
31 | }; | |
32 | ||
33 | struct lib_counter_layout { | |
34 | void *counters; | |
35 | unsigned long *overflow_bitmap; | |
36 | unsigned long *underflow_bitmap; | |
37 | int shm_fd; | |
38 | size_t shm_len; | |
39 | struct lttng_counter_shm_handle handle; | |
40 | }; | |
41 | ||
42 | enum lib_counter_arithmetic { | |
43 | LIB_COUNTER_ARITHMETIC_MODULAR, | |
44 | LIB_COUNTER_ARITHMETIC_SATURATE, | |
45 | }; | |
46 | ||
47 | struct lib_counter { | |
48 | size_t nr_dimensions; | |
49 | int64_t allocated_elem; | |
50 | struct lib_counter_dimension *dimensions; | |
51 | enum lib_counter_arithmetic arithmetic; | |
52 | union { | |
53 | struct { | |
54 | int32_t max, min; | |
55 | } limits_32_bit; | |
56 | struct { | |
57 | int64_t max, min; | |
58 | } limits_64_bit; | |
59 | } saturation; | |
60 | union { | |
61 | int8_t s8; | |
62 | int16_t s16; | |
63 | int32_t s32; | |
64 | int64_t s64; | |
65 | } global_sum_step; /* 0 if unused */ | |
66 | struct lib_counter_config config; | |
67 | ||
68 | struct lib_counter_layout global_counters; | |
69 | struct lib_counter_layout *percpu_counters; | |
70 | ||
71 | bool is_daemon; | |
72 | struct lttng_counter_shm_object_table *object_table; | |
73 | }; | |
74 | ||
75 | #endif /* _LTTNG_COUNTER_TYPES_H */ |