91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
#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;
|
|
#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 */
|