1 #ifndef BABELTRACE_ASSERT_INTERNAL_H
2 #define BABELTRACE_ASSERT_INTERNAL_H
5 * Copyright (c) 2018 EfficiOS Inc. and Linux Foundation
6 * Copyright (c) 2018 Philippe Proulx <pproulx@efficios.com>
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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
30 #include "common/macros.h"
34 extern void bt_common_assert_failed(const char *file
, int line
,
35 const char *func
, const char *assertion
) __attribute__((noreturn
));
38 * Internal assertion (to detect logic errors on which the library user
39 * has no influence). Use BT_ASSERT_PRE() to check a precondition which
40 * must be directly or indirectly satisfied by the library user.
42 #define BT_ASSERT(_cond) \
45 bt_common_assert_failed(__FILE__, __LINE__, __func__, \
46 G_STRINGIFY(_cond)); \
51 * Marks a function as being only used within a BT_ASSERT() context.
53 # define BT_ASSERT_FUNC
56 * When BT_DEBUG_MODE is not defined, define BT_ASSERT() macro to the following
57 * to trick the compiler into thinking that the variable passed as condition to
58 * the assertion is used. This is to prevent set-but-not-used warnings from the
59 * compiler when assertions are disabled. The `sizeof` operator also makes sure
60 * that the `_cond` expression is not evaluated, thus preventing unwanted side
63 * In-depth explanation: https://stackoverflow.com/questions/37411809/how-to-elegantly-fix-this-unused-variable-warning/37412551#37412551
65 # define BT_ASSERT(_cond) ((void) sizeof((void) (_cond), 0))
66 # define BT_ASSERT_FUNC __attribute__((unused))
67 #endif /* BT_DEBUG_MODE */
69 #endif /* BABELTRACE_ASSERT_INTERNAL_H */
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