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69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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sys/select.h
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Waiting on multiple file descriptors.
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*******************************************************************************/
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#ifndef _SYS_SELECT_H
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#define _SYS_SELECT_H 1
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#include <features.h>
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#include <string.h> /* TODO: HACK: for FD_ZERO */
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__BEGIN_DECLS
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@include(time_t.h)
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@include(suseconds_t.h)
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__BEGIN_DECLS
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#include <sortix/sigset.h>
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#include <sortix/timespec.h>
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#include <sortix/timeval.h>
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__END_DECLS
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#define FD_SETSIZE 1024
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#define __FD_ELEM_SIZE ((int) sizeof(__fd_mask))
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#define __FD_ELEM_BITS (8 * __FD_ELEM_SIZE)
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typedef long int __fd_mask;
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typedef struct
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{
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__fd_mask __fds_bits[FD_SETSIZE / (8 * (int) sizeof(__fd_mask))];
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} fd_set;
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#define __FD_INDEX(fd) ((fd) / __FD_ELEM_BITS)
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#define __FD_EXPONENT(fd) ((__fd_mask) (fd) % __FD_ELEM_BITS)
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#define __FD_MASK(fd) (1 << __FD_EXPONENT(fd))
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#define __FD_ACCESS(fd, fdsetp) ((fdsetp)->__fds_bits[__FD_INDEX(fd)])
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#define FD_CLR(fd, fdsetp) (__FD_ACCESS(fd, fdsetp) &= ~__FD_MASK(fd))
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#define FD_ISSET(fd, fdsetp) (__FD_ACCESS(fd, fdsetp) & __FD_MASK(fd))
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#define FD_SET(fd, fdsetp) (__FD_ACCESS(fd, fdsetp) |= __FD_MASK(fd))
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#define FD_ZERO(fdsetp) memset(fdsetp, 0, sizeof(fd_set))
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/* TODO: pselect */
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int select(int, fd_set* restrict, fd_set* restrict, fd_set* restrict,
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struct timeval* restrict);
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__END_DECLS
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#endif
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