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1 | #ifndef BABELTRACE_ASSERT_PRE_INTERNAL_H |
2 | #define BABELTRACE_ASSERT_PRE_INTERNAL_H | |
3 | ||
4 | /* | |
5 | * Copyright (c) 2018 EfficiOS Inc. and Linux Foundation | |
6 | * Copyright (c) 2018 Philippe Proulx <pproulx@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 | /* | |
28 | * The macros in this header use macros defined in | |
29 | * <babeltrace/lib-logging-internal.h>. We don't want this header to | |
30 | * automatically include <babeltrace/lib-logging-internal.h> because you | |
31 | * need to manually define BT_LOG_TAG before including | |
32 | * <babeltrace/lib-logging-internal.h> and it is unexpected that you | |
33 | * also need to define it before including this header. | |
34 | * | |
35 | * This is a reminder that in order to use | |
36 | * <babeltrace/assert-internal.hpp>, you also need to use logging | |
37 | * explicitly. | |
38 | */ | |
39 | #ifndef BABELTRACE_LIB_LOGGING_INTERNAL_H | |
40 | # error Include <babeltrace/lib-logging-internal.h> before this header. | |
41 | #endif | |
42 | ||
43 | #include <stdlib.h> | |
44 | ||
45 | #ifdef BT_DEV_MODE | |
46 | /* | |
47 | * Asserts that the library precondition _cond is satisfied. | |
48 | * | |
49 | * If _cond is false, log a fatal statement using _fmt and the optional | |
50 | * arguments using BT_LIB_LOGF(), and abort. | |
51 | * | |
52 | * To assert that a postcondition is satisfied or that some internal | |
53 | * object/context/value is in the expected state, use BT_ASSERT(). | |
54 | */ | |
55 | # define BT_ASSERT_PRE(_cond, _fmt, ...) \ | |
56 | do { \ | |
57 | if (!(_cond)) { \ | |
58 | BT_LOGF_STR("Library precondition not satisfied:"); \ | |
59 | BT_LIB_LOGF((_fmt), ##__VA_ARGS__); \ | |
60 | BT_LOGF_STR("Aborting..."); \ | |
61 | abort(); \ | |
62 | } \ | |
63 | } while (0) | |
64 | ||
65 | /* | |
66 | * Marks a function as being only used within a BT_ASSERT_PRE() context. | |
67 | */ | |
68 | # define BT_ASSERT_PRE_FUNC | |
69 | ||
70 | /* | |
71 | * Prints the details of an unsatisfied precondition without immediately | |
72 | * aborting. You should use this within a function which checks | |
73 | * preconditions, but which is called from a BT_ASSERT_PRE() context, so | |
74 | * that the function can still return its result for BT_ASSERT_PRE() to | |
75 | * evaluate it. | |
76 | * | |
77 | * Example: | |
78 | * | |
79 | * BT_ASSERT_PRE_FUNC | |
80 | * static inline bool check_complex_precond(...) | |
81 | * { | |
82 | * ... | |
83 | * | |
84 | * if (...) { | |
85 | * BT_ASSERT_PRE_MSG("Invalid object: ...", ...); | |
86 | * return false; | |
87 | * } | |
88 | * | |
89 | * ... | |
90 | * } | |
91 | * | |
92 | * ... | |
93 | * | |
94 | * BT_ASSERT_PRE(check_complex_precond(...), | |
95 | * "Precondition is not satisfied: ...", ...); | |
96 | */ | |
97 | # define BT_ASSERT_PRE_MSG BT_LIB_LOGF | |
98 | #else | |
99 | # define BT_ASSERT_PRE(_cond, _fmt, ...) | |
100 | # define BT_ASSERT_PRE_FUNC __attribute__((unused)) | |
101 | # define BT_ASSERT_PRE_MSG(_fmt, ...) | |
102 | #endif /* BT_DEV_MODE */ | |
103 | ||
104 | /* | |
105 | * Developer mode: asserts that a given variable is not NULL. | |
106 | */ | |
107 | #define BT_ASSERT_PRE_NON_NULL(_obj, _obj_name) \ | |
108 | BT_ASSERT_PRE((_obj) != NULL, "%s is NULL: ", _obj_name) | |
109 | ||
110 | /* | |
111 | * Developer mode: asserts that a given object is NOT frozen. This macro | |
112 | * checks the `frozen` field of _obj. | |
113 | */ | |
114 | #define BT_ASSERT_PRE_HOT(_obj, _obj_name, _fmt, ...) \ | |
115 | BT_ASSERT_PRE(!(_obj)->frozen, "%s is frozen" _fmt, _obj_name, \ | |
116 | ##__VA_ARGS__) | |
117 | ||
118 | #endif /* BABELTRACE_ASSERT_PRE_INTERNAL_H */ |