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#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 enough for most uses.
*/
#ifndef FD_SETSIZE
# ifdef __CYGWIN__
# define FD_SETSIZE 1024
# elifdef __rtems__
# define FD_SETSIZE 256
# else
# define FD_SETSIZE 64
# endif
#endif
typedef unsigned long __fd_mask;
#if __BSD_VISIBLE
typedef __fd_mask fd_mask;
#endif
#define _NFDBITS ((int)sizeof(__fd_mask) * 8) /* bits per mask */
#if __BSD_VISIBLE
#define NFDBITS _NFDBITS
#endif
#ifndef _howmany
#define _howmany(x,y) (((x) + ((y) - 1)) / (y))
#endif
typedef struct fd_set {
__fd_mask __fds_bits[_howmany(FD_SETSIZE, _NFDBITS)];
} fd_set;
#if __BSD_VISIBLE
#define fds_bits __fds_bits
#endif
#define __fdset_mask(n) ((__fd_mask)1 << ((n) % _NFDBITS))
#define FD_CLR(n, p) ((p)->__fds_bits[(n)/_NFDBITS] &= ~__fdset_mask(n))
#if __BSD_VISIBLE
#define FD_COPY(f, t) (void)(*(t) = *(f))
#endif
#define FD_ISSET(n, p) (((p)->__fds_bits[(n)/_NFDBITS] & __fdset_mask(n)) != 0)
#define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n))
#define FD_ZERO(p) do { \
fd_set *_p; \
__size_t _n; \
\
_p = (p); \
_n = _howmany(FD_SETSIZE, _NFDBITS); \
while (_n > 0) \
_p->__fds_bits[--_n] = 0; \
} while (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 */
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