Commit | Line | Data |
---|---|---|
7a4bdb54 YB |
1 | /* This file is part of the Linux Trace Toolkit trace reading library |
2 | * Copyright (C) 2003-2004 Mathieu Desnoyers | |
3 | * | |
adc007f3 YB |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License Version 2 as | |
6 | * published by the Free Software Foundation; | |
7a4bdb54 | 7 | * |
adc007f3 | 8 | * This program is distributed in the hope that it will be useful, |
7a4bdb54 | 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
adc007f3 YB |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details. | |
7a4bdb54 | 12 | * |
adc007f3 YB |
13 | * You should have received a copy of the GNU General Public License |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
16 | * MA 02110-1301, USA | |
7a4bdb54 YB |
17 | */ |
18 | ||
19 | #ifndef COMPILER_H | |
20 | #define COMPILER_H | |
21 | ||
22 | /* Fast prediction if likely branches */ | |
23 | #define likely(x) __builtin_expect(!!(x), 1) | |
24 | #define unlikely(x) __builtin_expect(!!(x), 0) | |
25 | ||
26 | ||
27 | /* | |
28 | * Check at compile time that something is of a particular type. | |
29 | * Always evaluates to 1 so you may use it easily in comparisons. | |
30 | */ | |
31 | #define typecheck(type,x) \ | |
32 | ({ type __dummy; \ | |
33 | typeof(x) __dummy2; \ | |
34 | (void)(&__dummy == &__dummy2); \ | |
35 | 1; \ | |
36 | }) | |
37 | ||
38 | /* Deal with 32 wrap correctly */ | |
39 | #define guint32_after(a,b) \ | |
40 | (typecheck(guint32, a) && \ | |
41 | typecheck(guint32, b) && \ | |
42 | ((gint32)(b) - (gint32)(a) < 0)) | |
43 | #define guint32_before(a,b) guint32_after(b,a) | |
44 | ||
45 | #define guint32_after_eq(a,b) \ | |
46 | (typecheck(guint32, a) && \ | |
47 | typecheck(guint32, b) && \ | |
48 | ((gint32)(b) - (gint32)(a) <= 0)) | |
49 | #define guint32_before_eq(a,b) guint32_after_eq(b,a) | |
50 | ||
51 | #define __EXPORT __attribute__ ((visibility ("default"))) | |
52 | ||
53 | #ifndef max | |
54 | #define max(a,b) ((a)>(b)?(a):(b)) | |
55 | #endif | |
56 | ||
57 | #ifndef min | |
58 | #define min(a,b) ((a)<(b)?(a):(b)) | |
59 | #endif | |
60 | ||
61 | #endif //COMPILER_H |