source: trunk/src/lol/base/assert.h @ 2297

Last change on this file since 2297 was 2297, checked in by sam, 7 years ago

base: implement UNUSED() macro and put it here and there.

File size: 4.0 KB
Line 
1//
2// Lol Engine
3//
4// Copyright: (c) 2010-2013 Sam Hocevar <sam@hocevar.net>
5//   This program is free software; you can redistribute it and/or
6//   modify it under the terms of the Do What The Fuck You Want To
7//   Public License, Version 2, as published by Sam Hocevar. See
8//   http://www.wtfpl.net/ for more details.
9//
10
11#if !defined __LOL_BASE_ASSERT_H__
12#define __LOL_BASE_ASSERT_H__
13
14#include <cstdlib>
15
16namespace lol
17{
18
19static inline void Abort()
20{
21#if defined __CELLOS_LV2__
22    *(uint32_t *)NULL = 0xdead;
23#else
24    std::abort();
25#endif
26}
27
28#define LOL_CALL(macro, args) macro args
29#define LOL_EVAL(a) a
30#define LOL_1ST(a, ...) a
31
32#define LOL_GET_63RD(a01, a02, a03, a04, a05, a06, a07, a08, a09, a10, \
33                     a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, \
34                     a21, a22, a23, a24, a25, a26, a27, a28, a29, a30, \
35                     a31, a32, a33, a34, a35, a36, a37, a38, a39, a40, \
36                     a41, a42, a43, a44, a45, a46, a47, a48, a49, a50, \
37                     a51, a52, a53, a54, a55, a56, a57, a58, a59, a60, \
38                     a61, a62, a63, ...) a63
39#define LOL_COUNT_TO_3(...) \
40    LOL_EVAL(LOL_GET_63RD(__VA_ARGS__, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, \
41                                       3, 3, 3, 3, 3, 3, 3, 3, 3, 3, \
42                                       3, 3, 3, 3, 3, 3, 3, 3, 3, 3, \
43                                       3, 3, 3, 3, 3, 3, 3, 3, 3, 3, \
44                                       3, 3, 3, 3, 3, 3, 3, 3, 3, 3, \
45                                       3, 3, 3, 3, 3, 3, 3, 3, 3, 3, \
46                                       2, 1, TOO_FEW_ARGUMENTS))
47#define LOL_COUNT_TO_8(...) \
48    LOL_EVAL(LOL_GET_63RD(__VA_ARGS__, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, \
49                                       8, 8, 8, 8, 8, 8, 8, 8, 8, 8, \
50                                       8, 8, 8, 8, 8, 8, 8, 8, 8, 8, \
51                                       8, 8, 8, 8, 8, 8, 8, 8, 8, 8, \
52                                       8, 8, 8, 8, 8, 8, 8, 8, 8, 8, \
53                                       8, 8, 8, 8, 8, 7, 6, 5, 4, 3, \
54                                       2, 1, TOO_FEW_ARGUMENTS))
55
56/* Three levels of dispatch are needed because of Visual Studio's bizarre
57 * handling of __VA_ARGS__ inside macro calls */
58#define LOL_CAT3(a, b) a##b
59#define LOL_CAT2(a, b) LOL_CAT3(a,b)
60#define LOL_CAT(a, b) LOL_CAT2(a,b)
61
62/*
63 * UNUSED(): declare one or several variables as unused
64 */
65
66#define LOL_UNUSED_1(a01) \
67    sizeof(a01)
68#define LOL_UNUSED_2(a01, a02) \
69    sizeof(a01) + LOL_UNUSED_1(a02)
70#define LOL_UNUSED_3(a01, a02, a03) \
71    sizeof(a01) + LOL_UNUSED_2(a02, a03)
72#define LOL_UNUSED_4(a01, a02, a03, a04) \
73    sizeof(a01) + LOL_UNUSED_3(a02, a03, a04)
74#define LOL_UNUSED_5(a01, a02, a03, a04, a05) \
75    sizeof(a01) + LOL_UNUSED_4(a02, a03, a04, a05)
76#define LOL_UNUSED_6(a01, a02, a03, a04, a05, a06) \
77    sizeof(a01) + LOL_UNUSED_5(a02, a03, a04, a05, a06)
78#define LOL_UNUSED_7(a01, a02, a03, a04, a05, a06, a07) \
79    sizeof(a01) + LOL_UNUSED_6(a02, a03, a04, a05, a06, a07)
80#define LOL_UNUSED_8(a01, a02, a03, a04, a05, a06, a07, a08) \
81    sizeof(a01) + LOL_UNUSED_7(a02, a03, a04, a05, a06, a07, a08)
82
83#define UNUSED(...) (void)sizeof((void)( \
84    LOL_CALL(LOL_CAT(LOL_UNUSED_, LOL_CALL(LOL_COUNT_TO_8, (__VA_ARGS__))), \
85             (__VA_ARGS__))), 0) \
86
87/*
88 * ASSERT(): test and enforce conditions at runtime
89 */
90
91#define LOL_ERROR_1(t) \
92    Log::Error("assertion failure: " #t "\n")
93
94#define LOL_ERROR_2(t, s) \
95    Log::Error("assertion failure: %s\n", s)
96
97#define LOL_ERROR_3(t, s, ...) \
98    Log::Error("assertion failure: " s "\n", __VA_ARGS__)
99
100#if FINAL_RELEASE
101#   define ASSERT(...) UNUSED(LOL_CALL(LOL_1ST, (__VA_ARGS__)))
102#else
103#   define ASSERT(...) \
104        if (!(LOL_CALL(LOL_1ST, (__VA_ARGS__)))) \
105        { \
106            LOL_CALL(LOL_CAT(LOL_ERROR_, LOL_CALL(LOL_COUNT_TO_3, \
107                                                  (__VA_ARGS__))), \
108                     (__VA_ARGS__)); \
109            Abort(); \
110        }
111#endif
112
113} /* namespace lol */
114
115#endif // __LOL_BASE_ASSERT_H__
116
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