88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
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/* select.h
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Copyright 1998, 1999, 2000, 2001, 2005, 2009 Red Hat, Inc.
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Written by Geoffrey Noer <noer@cygnus.com>
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _SYS_SELECT_H
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#define _SYS_SELECT_H
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/* We don't define fd_set and friends if we are compiling POSIX
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source, or if we have included (or may include as indicated
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by __USE_W32_SOCKETS) the W32api winsock[2].h header which
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defines Windows versions of them. Note that a program which
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includes the W32api winsock[2].h header must know what it is doing;
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it must not call the Cygwin select function.
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*/
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# if !(defined (_WINSOCK_H) || defined (_WINSOCKAPI_) || defined (__USE_W32_SOCKETS))
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#include <sys/cdefs.h>
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#include <sys/_sigset.h>
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#include <sys/_timeval.h>
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#include <sys/timespec.h>
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#if !defined(_SIGSET_T_DECLARED)
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#define _SIGSET_T_DECLARED
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typedef __sigset_t sigset_t;
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#endif
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# define _SYS_TYPES_FD_SET
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/*
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* Select uses bit masks of file descriptors in longs.
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* These macros manipulate such bit fields (the filesystem macros use chars).
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* FD_SETSIZE may be defined by the user, but the default here
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* should be >= NOFILE (param.h).
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*/
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# ifndef FD_SETSIZE
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# define FD_SETSIZE 64
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# endif
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typedef unsigned long fd_mask;
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# define NFDBITS (sizeof (fd_mask) * 8) /* bits per mask */
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# ifndef _howmany
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# define _howmany(x,y) (((x)+((y)-1))/(y))
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# endif
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/* We use a macro for fd_set so that including Sockets.h afterwards
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can work. */
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typedef struct _types_fd_set {
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fd_mask fds_bits[_howmany(FD_SETSIZE, NFDBITS)];
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} _types_fd_set;
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#define fd_set _types_fd_set
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# define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS)))
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# define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS)))
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# define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS)))
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# define FD_ZERO(p) (__extension__ (void)({ \
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size_t __i; \
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char *__tmp = (char *)p; \
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for (__i = 0; __i < sizeof (*(p)); ++__i) \
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*__tmp++ = 0; \
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}))
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#if !defined (__INSIDE_CYGWIN_NET__)
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__BEGIN_DECLS
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int select __P ((int __n, fd_set *__readfds, fd_set *__writefds,
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fd_set *__exceptfds, struct timeval *__timeout));
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#if __POSIX_VISIBLE >= 200112
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int pselect __P ((int __n, fd_set *__readfds, fd_set *__writefds,
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fd_set *__exceptfds, const struct timespec *__timeout,
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const sigset_t *__set));
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#endif
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__END_DECLS
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#endif /* !__INSIDE_CYGWIN_NET__ */
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#endif /* !(_WINSOCK_H || _WINSOCKAPI_ || __USE_W32_SOCKETS) */
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#endif /* sys/select.h */
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