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annotate Include/myselect.h @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 65d2d8e67da3
children f2b98cbc5030
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1 #ifndef Py_MYSELECT_H
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2 #define Py_MYSELECT_H
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3 #ifdef __cplusplus
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4 extern "C" {
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5 #endif
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6
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7 /***********************************************************
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8 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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9 The Netherlands.
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10
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11 All Rights Reserved
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13 Permission to use, copy, modify, and distribute this software and its
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14 documentation for any purpose and without fee is hereby granted,
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15 provided that the above copyright notice appear in all copies and that
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16 both that copyright notice and this permission notice appear in
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17 supporting documentation, and that the names of Stichting Mathematisch
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18 Centrum or CWI or Corporation for National Research Initiatives or
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19 CNRI not be used in advertising or publicity pertaining to
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20 distribution of the software without specific, written prior
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21 permission.
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22
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23 While CWI is the initial source for this software, a modified version
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24 is made available by the Corporation for National Research Initiatives
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25 (CNRI) at the Internet address ftp://ftp.python.org.
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26
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27 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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28 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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29 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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30 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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31 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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32 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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33 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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34 PERFORMANCE OF THIS SOFTWARE.
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35
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36 ******************************************************************/
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38 /* Include file for users of select() */
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40 /* NB caller must include <sys/types.h> */
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42 #ifdef HAVE_SYS_SELECT_H
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43
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44 #include <sys/select.h>
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45
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46 #ifdef SYS_SELECT_WITH_SYS_TIME
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47 #include "mytime.h"
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48 #else /* !SYS_SELECT_WITH_SYS_TIME */
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49 #include <time.h>
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50 #endif /* !SYS_SELECT_WITH_SYS_TIME */
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52 #else /* !HAVE_SYS_SELECT_H */
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54 #ifdef USE_GUSI
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55 /* If we don't have sys/select the definition may be in unistd.h */
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56 #include <GUSI.h>
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57 #endif
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58
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59 #include "mytime.h"
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61 #endif /* !HAVE_SYS_SELECT_H */
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63 /* If the fd manipulation macros aren't defined,
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64 here is a set that should do the job */
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66 #ifndef FD_SETSIZE
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67 #define FD_SETSIZE 256
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68 #endif
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70 #ifndef FD_SET
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72 typedef long fd_mask;
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74 #define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
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75 #ifndef howmany
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76 #define howmany(x, y) (((x)+((y)-1))/(y))
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77 #endif /* howmany */
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79 typedef struct fd_set {
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80 fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
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81 } fd_set;
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83 #define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
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84 #define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
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85 #define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
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86 #define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
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88 #endif /* FD_SET */
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90 #ifdef __cplusplus
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91 }
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92 #endif
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93 #endif /* !Py_MYSELECT_H */