67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
#ifndef _SYS_SELECT_H
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#define _SYS_SELECT_H 1
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// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_select.h.html
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#include <bits/types/timeval.h>
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#include <signal.h>
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#include <time.h>
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#define FD_SETSIZE 1024
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typedef unsigned long __fd_mask;
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#define __FD_MASK_SIZE (8 * sizeof(__fd_mask))
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typedef struct {
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__fd_mask __bits[FD_SETSIZE / __FD_MASK_SIZE];
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} fd_set;
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#define FD_CLR(fd, setp) \
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do { \
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__fd_mask off = (fd) / __FD_MASK_SIZE; \
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__fd_mask bit = (fd) % __FD_MASK_SIZE; \
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(setp)->__bits[off] &= ~((__fd_mask)1 << bit); \
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} while (0)
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#define FD_ISSET(fd, setp) \
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({ \
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__fd_mask off = (fd) / __FD_MASK_SIZE; \
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__fd_mask bit = (fd) % __FD_MASK_SIZE; \
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(setp)->__bits[off] & ((__fd_mask)1 << bit); \
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})
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#define FD_SET(fd, setp) \
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do { \
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__fd_mask off = (fd) / __FD_MASK_SIZE; \
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__fd_mask bit = (fd) % __FD_MASK_SIZE; \
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(setp)->__bits[off] |= ((__fd_mask)1 << bit); \
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} while (0)
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#define FD_ZERO(setp) \
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do { \
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for (int i = 0; i < FD_SETSIZE / __FD_MASK_SIZE; i++) \
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(setp)->__bits[i] = (__fd_mask)0; \
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} while (0)
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struct sys_pselect_t
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{
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int nfds;
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fd_set* readfds;
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fd_set* writefds;
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fd_set* errorfds;
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const struct timespec* timeout;
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const sigset_t* sigmask;
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};
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int pselect(int nfds, fd_set* __restrict readfds, fd_set* __restrict writefds, fd_set* __restrict errorfds, const struct timespec* __restrict timeout, const sigset_t* __restrict sigmask);
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int select(int nfds, fd_set* __restrict readfds, fd_set* __restrict writefds, fd_set* __restrict errorfds, struct timeval* __restrict timeout);
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__END_DECLS
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#endif
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