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47c17d9768
timeval::tv_usec is going to be 64-bit wide even on 32-bit architectures. As not all architectures support 64-bit multiplications instructions, calls to libgcc (__multi3()) may be emitted by the compiler which are not provided by nolibc. As tv_usec and tv_nsec are guaranteed to always fit into an uint32_t, perform a 32-bit multiplication instead. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patch.msgid.link/20251220-nolibc-uapi-types-v3-7-c662992f75d7@weissschuh.net
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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#include "../nolibc.h"
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#ifndef _NOLIBC_SYS_SELECT_H
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#define _NOLIBC_SYS_SELECT_H
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#include <linux/time.h>
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#include <linux/unistd.h>
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/* commonly an fd_set represents 256 FDs */
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#ifndef FD_SETSIZE
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#define FD_SETSIZE 256
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#endif
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#define FD_SETIDXMASK (8 * sizeof(unsigned long))
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#define FD_SETBITMASK (8 * sizeof(unsigned long)-1)
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/* for select() */
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typedef struct {
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unsigned long fds[(FD_SETSIZE + FD_SETBITMASK) / FD_SETIDXMASK];
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} fd_set;
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#define FD_CLR(fd, set) do { \
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fd_set *__set = (set); \
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int __fd = (fd); \
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if (__fd >= 0) \
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__set->fds[__fd / FD_SETIDXMASK] &= \
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~(1U << (__fd & FD_SETBITMASK)); \
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} while (0)
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#define FD_SET(fd, set) do { \
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fd_set *__set = (set); \
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int __fd = (fd); \
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if (__fd >= 0) \
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__set->fds[__fd / FD_SETIDXMASK] |= \
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1 << (__fd & FD_SETBITMASK); \
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} while (0)
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#define FD_ISSET(fd, set) ({ \
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fd_set *__set = (set); \
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int __fd = (fd); \
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int __r = 0; \
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if (__fd >= 0) \
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__r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
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1U << (__fd & FD_SETBITMASK)); \
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__r; \
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})
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#define FD_ZERO(set) do { \
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fd_set *__set = (set); \
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int __idx; \
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int __size = (FD_SETSIZE+FD_SETBITMASK) / FD_SETIDXMASK;\
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for (__idx = 0; __idx < __size; __idx++) \
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__set->fds[__idx] = 0; \
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} while (0)
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/*
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* int select(int nfds, fd_set *read_fds, fd_set *write_fds,
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* fd_set *except_fds, struct timeval *timeout);
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*/
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static __attribute__((unused))
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int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
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{
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#if defined(__NR_pselect6_time64)
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struct __kernel_timespec t;
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if (timeout) {
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t.tv_sec = timeout->tv_sec;
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t.tv_nsec = (uint32_t)timeout->tv_usec * 1000;
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}
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return my_syscall6(__NR_pselect6_time64, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
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#else
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struct __kernel_old_timespec t;
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if (timeout) {
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t.tv_sec = timeout->tv_sec;
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t.tv_nsec = (uint32_t)timeout->tv_usec * 1000;
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}
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return my_syscall6(__NR_pselect6, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
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#endif
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}
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static __attribute__((unused))
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int select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
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{
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return __sysret(sys_select(nfds, rfds, wfds, efds, timeout));
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}
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#endif /* _NOLIBC_SYS_SELECT_H */
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