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a992f506 | 1 | /* __sigset_t manipulators. Linux version. |
d614a753 | 2 | Copyright (C) 1991-2020 Free Software Foundation, Inc. |
a992f506 ZW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
a992f506 ZW |
18 | |
19 | #ifndef _SIGSETOPS_H | |
20 | #define _SIGSETOPS_H 1 | |
21 | ||
22 | #include <signal.h> | |
23 | ||
24 | /* Return a mask that includes the bit for SIG only. */ | |
25 | # define __sigmask(sig) \ | |
26 | (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int)))) | |
27 | ||
28 | /* Return the word index for SIG. */ | |
29 | # define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int))) | |
30 | ||
31 | # define __sigemptyset(set) \ | |
32 | (__extension__ ({ \ | |
33 | int __cnt = _SIGSET_NWORDS; \ | |
34 | sigset_t *__set = (set); \ | |
35 | while (--__cnt >= 0) \ | |
36 | __set->__val[__cnt] = 0; \ | |
37 | (void)0; \ | |
38 | })) | |
39 | ||
40 | # define __sigfillset(set) \ | |
41 | (__extension__ ({ \ | |
42 | int __cnt = _SIGSET_NWORDS; \ | |
43 | sigset_t *__set = (set); \ | |
44 | while (--__cnt >= 0) \ | |
45 | __set->__val[__cnt] = ~0UL; \ | |
46 | (void)0; \ | |
47 | })) | |
48 | ||
49 | # define __sigisemptyset(set) \ | |
50 | (__extension__ ({ \ | |
51 | int __cnt = _SIGSET_NWORDS; \ | |
52 | const sigset_t *__set = (set); \ | |
53 | int __ret = __set->__val[--__cnt]; \ | |
54 | while (!__ret && --__cnt >= 0) \ | |
55 | __ret = __set->__val[__cnt]; \ | |
56 | __ret == 0; \ | |
57 | })) | |
58 | ||
59 | # define __sigandset(dest, left, right) \ | |
60 | (__extension__ ({ \ | |
61 | int __cnt = _SIGSET_NWORDS; \ | |
62 | sigset_t *__dest = (dest); \ | |
63 | const sigset_t *__left = (left); \ | |
64 | const sigset_t *__right = (right); \ | |
65 | while (--__cnt >= 0) \ | |
66 | __dest->__val[__cnt] = (__left->__val[__cnt] \ | |
67 | & __right->__val[__cnt]); \ | |
68 | (void)0; \ | |
69 | })) | |
70 | ||
71 | # define __sigorset(dest, left, right) \ | |
72 | (__extension__ ({ \ | |
73 | int __cnt = _SIGSET_NWORDS; \ | |
74 | sigset_t *__dest = (dest); \ | |
75 | const sigset_t *__left = (left); \ | |
76 | const sigset_t *__right = (right); \ | |
77 | while (--__cnt >= 0) \ | |
78 | __dest->__val[__cnt] = (__left->__val[__cnt] \ | |
79 | | __right->__val[__cnt]); \ | |
80 | (void)0; \ | |
81 | })) | |
82 | ||
83 | /* These macros needn't check for a bogus signal number; | |
84 | error checking is done in the non-__ versions. */ | |
85 | # define __sigismember(set, sig) \ | |
86 | (__extension__ ({ \ | |
87 | unsigned long int __mask = __sigmask (sig); \ | |
88 | unsigned long int __word = __sigword (sig); \ | |
89 | (set)->__val[__word] & __mask ? 1 : 0; \ | |
90 | })) | |
91 | ||
92 | # define __sigaddset(set, sig) \ | |
93 | (__extension__ ({ \ | |
94 | unsigned long int __mask = __sigmask (sig); \ | |
95 | unsigned long int __word = __sigword (sig); \ | |
96 | (set)->__val[__word] |= __mask; \ | |
97 | (void)0; \ | |
98 | })) | |
99 | ||
100 | # define __sigdelset(set, sig) \ | |
101 | (__extension__ ({ \ | |
102 | unsigned long int __mask = __sigmask (sig); \ | |
103 | unsigned long int __word = __sigword (sig); \ | |
104 | (set)->__val[__word] &= ~__mask; \ | |
105 | (void)0; \ | |
106 | })) | |
107 | ||
108 | #endif /* bits/sigsetops.h */ |