sessiond: defer tracer notification jobs to the action executor
[lttng-tools.git] / src / common / uuid.h
1 /*
2 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 */
7
8 #ifndef LTTNG_UUID_H
9 #define LTTNG_UUID_H
10
11 #include <common/macros.h>
12 #include <stdbool.h>
13 #include <stdint.h>
14 #include <inttypes.h>
15
16 /*
17 * Includes final \0.
18 */
19 #define LTTNG_UUID_STR_LEN 37
20 #define LTTNG_UUID_LEN 16
21 #define LTTNG_UUID_VER 4
22
23 #define LTTNG_UUID_FMT \
24 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "-%02" SCNx8 \
25 "%02" SCNx8 "-%02" SCNx8 "%02" SCNx8 "-%02" SCNx8 "%02" SCNx8 \
26 "-%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 "%02" SCNx8 \
27 "%02" SCNx8
28
29 #define LTTNG_UUID_FMT_VALUES(uuid) \
30 (uuid)[0], (uuid)[1], (uuid)[2], (uuid)[3], (uuid)[4], (uuid)[5], \
31 (uuid)[6], (uuid)[7], (uuid)[8], (uuid)[9], (uuid)[10], (uuid)[11], \
32 (uuid)[12], (uuid)[13], (uuid)[14], (uuid)[15]
33
34 #define LTTNG_UUID_SCAN_VALUES(uuid) \
35 &(uuid)[0], &(uuid)[1], &(uuid)[2], &(uuid)[3], &(uuid)[4], &(uuid)[5], \
36 &(uuid)[6], &(uuid)[7], &(uuid)[8], &(uuid)[9], &(uuid)[10], &(uuid)[11], \
37 &(uuid)[12], &(uuid)[13], &(uuid)[14], &(uuid)[15]
38
39 typedef uint8_t lttng_uuid[LTTNG_UUID_LEN];
40
41 LTTNG_HIDDEN
42 int lttng_uuid_from_str(const char *str_in, lttng_uuid uuid_out);
43
44 /*
45 * Convert a UUID to a human-readable, NULL-terminated, string of the form
46 * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
47 *
48 * Assumes uuid_str is at least LTTNG_UUID_STR_LEN byte long.
49 */
50 LTTNG_HIDDEN
51 void lttng_uuid_to_str(const lttng_uuid uuid, char *uuid_str);
52
53 LTTNG_HIDDEN
54 bool lttng_uuid_is_equal(const lttng_uuid a, const lttng_uuid b);
55
56 LTTNG_HIDDEN
57 bool lttng_uuid_is_nil(const lttng_uuid uuid);
58
59 LTTNG_HIDDEN
60 void lttng_uuid_copy(lttng_uuid dst, const lttng_uuid src);
61
62 /*
63 * Generate a random UUID according to RFC4122, section 4.4.
64 */
65 LTTNG_HIDDEN
66 int lttng_uuid_generate(lttng_uuid uuid_out);
67
68 #endif /* LTTNG_UUID_H */
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