| 1 | /* select.h |
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| 2 | Copyright 1998, 1999, 2000, 2001, 2005, 2009 Red Hat, Inc. |
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| 3 | |
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| 4 | Written by Geoffrey Noer <noer@cygnus.com> |
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| 5 | |
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| 6 | This file is part of Cygwin. |
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| 7 | |
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| 8 | This software is a copyrighted work licensed under the terms of the |
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| 9 | Cygwin license. Please consult the file "CYGWIN_LICENSE" for |
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| 10 | details. */ |
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| 11 | |
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| 12 | #ifndef _SYS_SELECT_H |
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| 13 | #define _SYS_SELECT_H |
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| 14 | |
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| 15 | /* We don't define fd_set and friends if we are compiling POSIX |
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| 16 | source, or if we have included (or may include as indicated |
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| 17 | by __USE_W32_SOCKETS) the W32api winsock[2].h header which |
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| 18 | defines Windows versions of them. Note that a program which |
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| 19 | includes the W32api winsock[2].h header must know what it is doing; |
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| 20 | it must not call the Cygwin select function. |
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| 21 | */ |
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| 22 | # if !(defined (_WINSOCK_H) || defined (_WINSOCKAPI_) || defined (__USE_W32_SOCKETS)) |
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| 23 | |
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| 24 | #include <sys/cdefs.h> |
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| 25 | #include <sys/_sigset.h> |
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| 26 | #include <sys/_timeval.h> |
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| 27 | #include <sys/timespec.h> |
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| 28 | |
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| 29 | #if !defined(_SIGSET_T_DECLARED) |
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| 30 | #define _SIGSET_T_DECLARED |
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| 31 | typedef __sigset_t sigset_t; |
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| 32 | #endif |
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| 33 | |
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| 34 | # define _SYS_TYPES_FD_SET |
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| 35 | /* |
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| 36 | * Select uses bit masks of file descriptors in longs. |
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| 37 | * These macros manipulate such bit fields (the filesystem macros use chars). |
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| 38 | * FD_SETSIZE may be defined by the user, but the default here |
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| 39 | * should be >= NOFILE (param.h). |
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| 40 | */ |
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| 41 | # ifndef FD_SETSIZE |
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| 42 | # define FD_SETSIZE 64 |
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| 43 | # endif |
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| 44 | |
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| 45 | typedef unsigned long fd_mask; |
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| 46 | # define NFDBITS (sizeof (fd_mask) * 8) /* bits per mask */ |
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| 47 | # ifndef _howmany |
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| 48 | # define _howmany(x,y) (((x)+((y)-1))/(y)) |
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| 49 | # endif |
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| 50 | |
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| 51 | /* We use a macro for fd_set so that including Sockets.h afterwards |
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| 52 | can work. */ |
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| 53 | typedef struct _types_fd_set { |
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| 54 | fd_mask fds_bits[_howmany(FD_SETSIZE, NFDBITS)]; |
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| 55 | } _types_fd_set; |
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| 56 | |
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| 57 | #define fd_set _types_fd_set |
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| 58 | |
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| 59 | # define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS))) |
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| 60 | # define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS))) |
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| 61 | # define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS))) |
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| 62 | # define FD_ZERO(p) (__extension__ (void)({ \ |
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| 63 | size_t __i; \ |
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| 64 | char *__tmp = (char *)p; \ |
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| 65 | for (__i = 0; __i < sizeof (*(p)); ++__i) \ |
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| 66 | *__tmp++ = 0; \ |
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| 67 | })) |
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| 68 | |
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| 69 | #if !defined (__INSIDE_CYGWIN_NET__) |
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| 70 | |
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| 71 | __BEGIN_DECLS |
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| 72 | |
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| 73 | int select __P ((int __n, fd_set *__readfds, fd_set *__writefds, |
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| 74 | fd_set *__exceptfds, struct timeval *__timeout)); |
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| 75 | #if __POSIX_VISIBLE >= 200112 |
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| 76 | int pselect __P ((int __n, fd_set *__readfds, fd_set *__writefds, |
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| 77 | fd_set *__exceptfds, const struct timespec *__timeout, |
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| 78 | const sigset_t *__set)); |
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| 79 | #endif |
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| 80 | |
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| 81 | __END_DECLS |
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| 82 | |
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| 83 | #endif /* !__INSIDE_CYGWIN_NET__ */ |
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| 84 | |
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| 85 | #endif /* !(_WINSOCK_H || _WINSOCKAPI_ || __USE_W32_SOCKETS) */ |
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| 86 | |
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| 87 | #endif /* sys/select.h */ |
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