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Diffstat (limited to 'REORG.TODO/misc/sys/select.h')
| -rw-r--r-- | REORG.TODO/misc/sys/select.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/REORG.TODO/misc/sys/select.h b/REORG.TODO/misc/sys/select.h new file mode 100644 index 0000000000..06dd31b476 --- /dev/null +++ b/REORG.TODO/misc/sys/select.h @@ -0,0 +1,128 @@ +/* `fd_set' type and related macros, and `select'/`pselect' declarations. + Copyright (C) 1996-2017 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* 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/types/sigset_t.h> + +/* Get definition of timer specification structures. */ +#include <bits/types/time_t.h> +#include <bits/types/struct_timeval.h> +#ifdef __USE_XOPEN2K +# include <bits/types/struct_timespec.h> +#endif + +#ifndef __suseconds_t_defined +typedef __suseconds_t suseconds_t; +# define __suseconds_t_defined +#endif + + +/* The fd_set member is required to be an array of longs. */ +typedef long int __fd_mask; + +/* Some versions of <linux/posix_types.h> define this macros. */ +#undef __NFDBITS +/* It's easier to assume 8-bit bytes than to get CHAR_BIT. */ +#define __NFDBITS (8 * (int) sizeof (__fd_mask)) +#define __FD_ELT(d) ((d) / __NFDBITS) +#define __FD_MASK(d) ((__fd_mask) (1UL << ((d) % __NFDBITS))) + +/* fd_set for select and pselect. */ +typedef struct + { + /* XPG4.2 requires this member name. Otherwise avoid the name + from the global namespace. */ +#ifdef __USE_XOPEN + __fd_mask fds_bits[__FD_SETSIZE / __NFDBITS]; +# define __FDS_BITS(set) ((set)->fds_bits) +#else + __fd_mask __fds_bits[__FD_SETSIZE / __NFDBITS]; +# define __FDS_BITS(set) ((set)->__fds_bits) +#endif + } fd_set; + +/* Maximum number of file descriptors in `fd_set'. */ +#define FD_SETSIZE __FD_SETSIZE + +#ifdef __USE_MISC +/* Sometimes the fd_set member is assumed to have this type. */ +typedef __fd_mask fd_mask; + +/* 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) + + +__BEGIN_DECLS + +/* 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. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern int select (int __nfds, fd_set *__restrict __readfds, + fd_set *__restrict __writefds, + fd_set *__restrict __exceptfds, + struct timeval *__restrict __timeout); + +#ifdef __USE_XOPEN2K +/* 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. + + This function is a cancellation point and therefore not marked with + __THROW. */ +extern int pselect (int __nfds, fd_set *__restrict __readfds, + fd_set *__restrict __writefds, + fd_set *__restrict __exceptfds, + const struct timespec *__restrict __timeout, + const __sigset_t *__restrict __sigmask); +#endif + + +/* Define some inlines helping to catch common problems. */ +#if __USE_FORTIFY_LEVEL > 0 && defined __GNUC__ +# include <bits/select2.h> +#endif + +__END_DECLS + +#endif /* sys/select.h */ |