]>
Commit | Line | Data |
---|---|---|
2aa62f2b | 1 | /* $NetBSD: fd_set.h,v 1.2 2005/12/11 12:25:20 christos Exp $ */\r |
2 | \r | |
3 | /*-\r | |
4 | * Copyright (c) 1992, 1993\r | |
5 | * The Regents of the University of California. All rights reserved.\r | |
6 | *\r | |
7 | * Redistribution and use in source and binary forms, with or without\r | |
8 | * modification, are permitted provided that the following conditions\r | |
9 | * are met:\r | |
10 | * 1. Redistributions of source code must retain the above copyright\r | |
11 | * notice, this list of conditions and the following disclaimer.\r | |
12 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
13 | * notice, this list of conditions and the following disclaimer in the\r | |
14 | * documentation and/or other materials provided with the distribution.\r | |
15 | * 3. Neither the name of the University nor the names of its contributors\r | |
16 | * may be used to endorse or promote products derived from this software\r | |
17 | * without specific prior written permission.\r | |
18 | *\r | |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
29 | * SUCH DAMAGE.\r | |
30 | *\r | |
31 | * from: @(#)types.h 8.4 (Berkeley) 1/21/94\r | |
32 | */\r | |
33 | \r | |
34 | #ifndef _SYS_FD_SET_H_\r | |
35 | #define _SYS_FD_SET_H_\r | |
36 | \r | |
37 | #include <sys/EfiCdefs.h>\r | |
38 | #include <machine/int_types.h>\r | |
39 | \r | |
40 | /*\r | |
41 | * Implementation dependent defines, hidden from user space. X/Open does not\r | |
42 | * specify them.\r | |
43 | */\r | |
44 | #define __NBBY 8 /* number of bits in a byte */\r | |
45 | typedef __int32_t __fd_mask;\r | |
46 | \r | |
47 | /* bits per mask */\r | |
48 | #define __NFDBITS ((unsigned int)sizeof(__fd_mask) * __NBBY)\r | |
49 | \r | |
50 | #define __howmany(x, y) (((x) + ((y) - 1)) / (y))\r | |
51 | \r | |
52 | /*\r | |
53 | * Select uses bit masks of file descriptors in longs. These macros\r | |
54 | * manipulate such bit fields (the filesystem macros use chars).\r | |
55 | * FD_SETSIZE may be defined by the user, but the default here should\r | |
56 | * be enough for most uses.\r | |
57 | */\r | |
58 | #ifndef FD_SETSIZE\r | |
59 | #define FD_SETSIZE 256\r | |
60 | #endif\r | |
61 | \r | |
62 | typedef struct fd_set {\r | |
63 | __fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)];\r | |
64 | } fd_set;\r | |
65 | \r | |
66 | #define FD_SET(n, p) \\r | |
67 | ((p)->fds_bits[(n)/__NFDBITS] |= (1 << ((n) % __NFDBITS)))\r | |
68 | #define FD_CLR(n, p) \\r | |
69 | ((p)->fds_bits[(n)/__NFDBITS] &= ~(1 << ((n) % __NFDBITS)))\r | |
70 | #define FD_ISSET(n, p) \\r | |
71 | ((p)->fds_bits[(n)/__NFDBITS] & (1 << ((n) % __NFDBITS)))\r | |
72 | #if __GNUC_PREREQ__(2, 95)\r | |
73 | #define FD_ZERO(p) (void)__builtin_memset((p), 0, sizeof(*(p)))\r | |
74 | #else\r | |
75 | #define FD_ZERO(p) do { \\r | |
76 | fd_set *__fds = (p); \\r | |
77 | unsigned int __i; \\r | |
78 | for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \\r | |
79 | __fds->fds_bits[__i] = 0; \\r | |
80 | } while (/* CONSTCOND */ 0)\r | |
81 | #endif /* GCC 2.95 */\r | |
82 | \r | |
83 | /*\r | |
84 | * Expose our internals if we are not required to hide them.\r | |
85 | */\r | |
86 | #if defined(_NETBSD_SOURCE)\r | |
87 | \r | |
88 | #define fd_mask __fd_mask\r | |
89 | #define NFDBITS __NFDBITS\r | |
90 | #ifndef howmany\r | |
91 | #define howmany(a, b) __howmany(a, b)\r | |
92 | #endif\r | |
93 | \r | |
94 | #if __GNUC_PREREQ__(2, 95)\r | |
95 | #define FD_COPY(f, t) (void)__builtin_memcpy((t), (f), sizeof(*(f)))\r | |
96 | #else\r | |
97 | #define FD_COPY(f, t) do { \\r | |
98 | fd_set *__f = (f), *__t = (t); \\r | |
99 | unsigned int __i; \\r | |
100 | for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \\r | |
101 | __t->fds_bits[__i] = __f->fds_bits[__i]; \\r | |
102 | } while (/* CONSTCOND */ 0)\r | |
103 | #endif /* GCC 2.95 */\r | |
104 | \r | |
105 | #endif /* _NETBSD_SOURCE */\r | |
106 | \r | |
107 | #endif /* _SYS_FD_SET_H_ */\r |