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ebabbf58 MD |
1 | /* |
2 | * counter/counter-types.h | |
3 | * | |
4 | * LTTng Counters Types | |
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_TYPES_H | |
28 | #define _LTTNG_COUNTER_TYPES_H | |
29 | ||
30 | #include <stdint.h> | |
31 | #include <stddef.h> | |
32 | #include <stdbool.h> | |
33 | #include <sys/types.h> | |
34 | #include <lttng/counter-config.h> | |
35 | #include <lttng/ust-config.h> | |
36 | #include "shm_types.h" | |
37 | ||
38 | struct lib_counter_dimension { | |
39 | /* | |
40 | * Max. number of indexable elements. | |
41 | */ | |
42 | size_t max_nr_elem; | |
43 | /* | |
44 | * The stride for a dimension is the multiplication factor which | |
45 | * should be applied to its index to take into account other | |
46 | * dimensions nested inside. | |
47 | */ | |
48 | size_t stride; | |
49 | }; | |
50 | ||
51 | struct lib_counter_layout { | |
52 | void *counters; | |
53 | unsigned long *overflow_bitmap; | |
54 | unsigned long *underflow_bitmap; | |
55 | int shm_fd; | |
56 | size_t shm_len; | |
57 | struct lttng_counter_shm_handle handle; | |
58 | }; | |
59 | ||
60 | enum lib_counter_arithmetic { | |
61 | LIB_COUNTER_ARITHMETIC_MODULAR, | |
62 | LIB_COUNTER_ARITHMETIC_SATURATE, | |
63 | }; | |
64 | ||
65 | struct lib_counter { | |
66 | size_t nr_dimensions; | |
67 | int64_t allocated_elem; | |
68 | struct lib_counter_dimension *dimensions; | |
69 | enum lib_counter_arithmetic arithmetic; | |
70 | union { | |
71 | struct { | |
72 | int32_t max, min; | |
73 | } limits_32_bit; | |
74 | struct { | |
75 | int64_t max, min; | |
76 | } limits_64_bit; | |
77 | } saturation; | |
78 | union { | |
79 | int8_t s8; | |
80 | int16_t s16; | |
81 | int32_t s32; | |
82 | int64_t s64; | |
83 | } global_sum_step; /* 0 if unused */ | |
84 | struct lib_counter_config config; | |
85 | ||
86 | struct lib_counter_layout global_counters; | |
87 | struct lib_counter_layout *percpu_counters; | |
88 | ||
89 | bool is_daemon; | |
90 | struct lttng_counter_shm_object_table *object_table; | |
91 | }; | |
92 | ||
93 | #endif /* _LTTNG_COUNTER_TYPES_H */ |