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Diffstat (limited to 'misc/sys/select.h')
| -rw-r--r-- | misc/sys/select.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/misc/sys/select.h b/misc/sys/select.h new file mode 100644 index 0000000000..ece1916c0d --- /dev/null +++ b/misc/sys/select.h @@ -0,0 +1,81 @@ +/* `fd_set' type and related macros, and `select'/`pselect' declarations. +Copyright (C) 1996 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 <gnu/types.h> + +/* Get definition of timer specification structures. */ +/* XXX this is wrong. 1003.1gD6.1 says `struct timespec' + is defined by <sys/select.h>, and that is all. + However, since a program is required to include <sys/time.h> + before using select/pselect anyway, perhaps it doesn't matter. */ +#include <sys/time.h> + +__BEGIN_DECLS + +/* Representation of a set of file descriptors. */ +#define 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)); + +/* Same as above only that the TIMEOUT value is given with higher + resolution. This version should be used. */ +extern int __pselect __P ((int __nfds, __fd_set *__readfds, + __fd_set *__writefds, __fd_set *__exceptfds, + struct timespec *__timeout)); +extern int pselect __P ((int __nfds, __fd_set *__readfds, + __fd_set *__writefds, __fd_set *__exceptfds, + struct timespec *__timeout)); + +__END_DECLS + +#endif /* sys/select.h */ |