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1 | #ifndef BABELTRACE_ASSERT_INTERNAL_H |
2 | #define BABELTRACE_ASSERT_INTERNAL_H | |
3 | ||
4 | /* | |
ec4a3354 PP |
5 | * Copyright (c) 2018-2019 EfficiOS Inc. and Linux Foundation |
6 | * Copyright (c) 2018-2019 Philippe Proulx <pproulx@efficios.com> | |
d244c559 PP |
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 | #include <assert.h> | |
85e7137b MJ |
28 | #include <glib.h> |
29 | ||
30 | #include "common/macros.h" | |
d244c559 | 31 | |
1bf777d7 | 32 | extern void bt_common_assert_failed(const char *file, int line, |
ec4a3354 PP |
33 | const char *func, const char *assertion) |
34 | __attribute__((noreturn)); | |
1bf777d7 | 35 | |
d244c559 PP |
36 | /* |
37 | * Internal assertion (to detect logic errors on which the library user | |
ec4a3354 | 38 | * has no influence). Use BT_ASSERT_PRE*() or BT_ASSERT_POST*() to check |
c6f84660 PP |
39 | * preconditions or postconditions which must be directly or indirectly |
40 | * satisfied by the library user. | |
ec4a3354 PP |
41 | * |
42 | * BT_ASSERT() is enabled in both debug and non-debug modes. | |
d244c559 | 43 | */ |
1bf777d7 SM |
44 | #define BT_ASSERT(_cond) \ |
45 | do { \ | |
46 | if (!(_cond)) { \ | |
47 | bt_common_assert_failed(__FILE__, __LINE__, __func__, \ | |
85e7137b | 48 | G_STRINGIFY(_cond)); \ |
1bf777d7 SM |
49 | } \ |
50 | } while (0) | |
d244c559 PP |
51 | |
52 | /* | |
53 | * Marks a function as being only used within a BT_ASSERT() context. | |
54 | */ | |
ec4a3354 PP |
55 | #define BT_ASSERT_FUNC |
56 | ||
57 | #ifdef BT_DEBUG_MODE | |
58 | ||
59 | /* | |
60 | * Debug mode internal assertion. | |
61 | */ | |
62 | #define BT_ASSERT_DBG(_cond) BT_ASSERT(_cond) | |
63 | ||
71e89489 | 64 | /* |
ec4a3354 PP |
65 | * Marks a function as being only used within a BT_ASSERT_DBG() context. |
66 | */ | |
67 | #define BT_ASSERT_DBG_FUNC | |
68 | ||
69 | #else /* BT_DEBUG_MODE */ | |
70 | ||
71 | /* | |
72 | * When `BT_DEBUG_MODE` is _not_ defined, define BT_ASSERT_DBG() macro | |
73 | * to the following to trick the compiler into thinking that the | |
74 | * variable passed as condition to the assertion is used. This is to | |
75 | * prevent set-but-not-used warnings from the compiler when assertions | |
76 | * are disabled. The sizeof() operator also makes sure that the `_cond` | |
77 | * expression is not evaluated, thus preventing unwanted side effects. | |
71e89489 | 78 | * |
ec4a3354 PP |
79 | * In-depth explanation: |
80 | * https://stackoverflow.com/questions/37411809/how-to-elegantly-fix-this-unused-variable-warning/37412551#37412551 | |
71e89489 | 81 | */ |
ec4a3354 PP |
82 | # define BT_ASSERT_DBG(_cond) ((void) sizeof((void) (_cond), 0)) |
83 | # define BT_ASSERT_DBG_FUNC __attribute__((unused)) | |
84 | ||
d244c559 PP |
85 | #endif /* BT_DEBUG_MODE */ |
86 | ||
87 | #endif /* BABELTRACE_ASSERT_INTERNAL_H */ |