| 1 | /* |
| 2 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 5 | * of this software and associated documentation files (the "Software"), to |
| 6 | * deal in the Software without restriction, including without limitation the |
| 7 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 8 | * sell copies of the Software, and to permit persons to whom the Software is |
| 9 | * furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| 20 | * IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #ifndef LTTNG_UUID_H |
| 24 | #define LTTNG_UUID_H |
| 25 | |
| 26 | #include <common/macros.h> |
| 27 | #include <stdbool.h> |
| 28 | |
| 29 | /* |
| 30 | * Includes final \0. |
| 31 | */ |
| 32 | #define UUID_STR_LEN 37 |
| 33 | #define UUID_LEN 16 |
| 34 | |
| 35 | typedef unsigned char lttng_uuid[UUID_LEN]; |
| 36 | |
| 37 | #ifdef LTTNG_HAVE_LIBUUID |
| 38 | #include <uuid/uuid.h> |
| 39 | |
| 40 | /* |
| 41 | * uuid_out is of len UUID_LEN. |
| 42 | */ |
| 43 | static inline |
| 44 | int lttng_uuid_generate(lttng_uuid uuid_out) |
| 45 | { |
| 46 | uuid_generate(uuid_out); |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | #elif defined(LTTNG_HAVE_LIBC_UUID) |
| 51 | #include <uuid.h> |
| 52 | #include <stdint.h> |
| 53 | |
| 54 | /* |
| 55 | * uuid_out is of len UUID_LEN. |
| 56 | */ |
| 57 | static inline |
| 58 | int lttng_uuid_generate(lttng_uuid uuid_out) |
| 59 | { |
| 60 | uint32_t status; |
| 61 | |
| 62 | uuid_create((uuid_t *) uuid_out, &status); |
| 63 | if (status == uuid_s_ok) |
| 64 | return 0; |
| 65 | else |
| 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | #else |
| 70 | #error "LTTng-Tools needs to have a UUID generator configured." |
| 71 | #endif |
| 72 | |
| 73 | /* |
| 74 | * Convert a UUID to a human-readable, NULL-terminated, string of the form |
| 75 | * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. |
| 76 | * |
| 77 | * Assumes uuid_str is at least UUID_STR_LEN byte long. |
| 78 | */ |
| 79 | LTTNG_HIDDEN |
| 80 | void lttng_uuid_to_str(const lttng_uuid uuid, char *uuid_str); |
| 81 | |
| 82 | LTTNG_HIDDEN |
| 83 | bool lttng_uuid_is_equal(const lttng_uuid a, const lttng_uuid b); |
| 84 | |
| 85 | LTTNG_HIDDEN |
| 86 | bool lttng_uuid_is_nil(const lttng_uuid uuid); |
| 87 | |
| 88 | LTTNG_HIDDEN |
| 89 | void lttng_uuid_copy(lttng_uuid dst, const lttng_uuid src); |
| 90 | |
| 91 | #endif /* LTTNG_UUID_H */ |