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