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Diffstat (limited to 'include/sys/select.h')
| -rw-r--r-- | include/sys/select.h | 95 | 
1 files changed, 95 insertions, 0 deletions
diff --git a/include/sys/select.h b/include/sys/select.h new file mode 100644 index 000000000..0972560b9 --- /dev/null +++ b/include/sys/select.h @@ -0,0 +1,95 @@ +/* `fd_set' type and related macros, and `select'/`pselect' declarations. +   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. +   This file is part of the GNU C Library. + +   The GNU C Library is free software; you can redistribute it and/or +   modify it under the terms of the GNU Library General Public License as +   published by the Free Software Foundation; either version 2 of the +   License, or (at your option) any later version. + +   The GNU C Library is distributed in the hope that it will be useful, +   but WITHOUT ANY WARRANTY; without even the implied warranty of +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU +   Library General Public License for more details. + +   You should have received a copy of the GNU Library General Public +   License along with the GNU C Library; see the file COPYING.LIB.  If not, +   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +   Boston, MA 02111-1307, USA.  */ + +/*	POSIX 1003.1g: 6.2 Select from File Descriptor Sets <sys/select.h>  */ + +#ifndef _SYS_SELECT_H +#define _SYS_SELECT_H	1 + +#include <features.h> + +/* Get definition of needed basic types.  */ +#include <bits/types.h> + +/* Get __FD_* definitions.  */ +#include <bits/select.h> + +/* Get __sigset_t.  */ +#include <bits/sigset.h> + +/* Get definition of timer specification structures.  */ +#define __need_timespec +#include <time.h> + +__BEGIN_DECLS + +/* This declaration puts `struct timeval' in global scope even if +   <sys/time.h> has not been included to define it.  That way the +   `select' prototype below will not conflict with a later definition +   of `struct timeval'.  */ +struct timeval; + +typedef __fd_mask fd_mask; + +/* Representation of a set of file descriptors.  */ +typedef __fd_set fd_set; + +/* Maximum number of file descriptors in `fd_set'.  */ +#define	FD_SETSIZE		__FD_SETSIZE + +#ifdef __USE_MISC +/* Number of bits per word of `fd_set' (some code assumes this is 32).  */ +# define NFDBITS		__NFDBITS +#endif + + +/* Access macros for `fd_set'.  */ +#define	FD_SET(fd, fdsetp)	__FD_SET ((fd), (fdsetp)) +#define	FD_CLR(fd, fdsetp)	__FD_CLR ((fd), (fdsetp)) +#define	FD_ISSET(fd, fdsetp)	__FD_ISSET ((fd), (fdsetp)) +#define	FD_ZERO(fdsetp)		__FD_ZERO (fdsetp) + + +/* Check the first NFDS descriptors each in READFDS (if not NULL) for read +   readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS +   (if not NULL) for exceptional conditions.  If TIMEOUT is not NULL, time out +   after waiting the interval specified therein.  Returns the number of ready +   descriptors, or -1 for errors.  */ +extern int __select __P ((int __nfds, __fd_set *__readfds, +			  __fd_set *__writefds, __fd_set *__exceptfds, +			  struct timeval *__timeout)); +extern int select __P ((int __nfds, __fd_set *__readfds, +			__fd_set *__writefds, __fd_set *__exceptfds, +			struct timeval *__timeout)); + +#ifdef __USE_GNU +/* XXX Once/if POSIX.1g gets official this prototype will be available +   when defining __USE_POSIX.  */ +/* Same as above only that the TIMEOUT value is given with higher +   resolution and a sigmask which is been set temporarily.  This version +   should be used.  */ +extern int pselect __P ((int __nfds, __fd_set *__readfds, +			 __fd_set *__writefds, __fd_set *__exceptfds, +			 const struct timespec *__timeout, +			 const __sigset_t *__sigmask)); +#endif + +__END_DECLS + +#endif /* sys/select.h */  | 
