| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364 |
- /*
- * include/bits/select.h -- fd_set operations
- *
- * Copyright (C) 2001 NEC Corporation
- * Copyright (C) 2001 Miles Bader <miles@gnu.org>
- * Copyright (C) 1997, 1998 Free Software Foundation, Inc.
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License. See the file COPYING.LIB in the main
- * directory of this archive for more details.
- */
- #ifndef _SYS_SELECT_H
- # error "Never use <bits/select.h> directly; include <sys/select.h> instead."
- #endif
- #ifdef __GNUC__
- /* We don't use `memset' because this would require a prototype and
- the array isn't too big. */
- #define __FD_ZERO(s) \
- do { \
- unsigned int __i; \
- fd_set *__arr = (s); \
- for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \
- __FDS_BITS (__arr)[__i] = 0; \
- } while (0)
- #define __FD_SET(fd, s) \
- do { \
- int __fd = (fd); \
- void *__addr = (void *)&__FDS_BITS (s); \
- __asm__ __volatile__ ("set1 %0, [%1]" \
- : /*nothing*/ \
- : "r" (__fd & 0x7), "r" (__addr + (__fd >> 3)));\
- } while (0)
- #define __FD_CLR(fd, s) \
- do { \
- int __fd = (fd); \
- void *__addr = (void *)&__FDS_BITS (s); \
- __asm__ __volatile__ ("clr1 %0, [%1]" \
- : /*nothing*/ \
- : "r" (__fd & 0x7), "r" (__addr + (__fd >> 3)));\
- } while (0)
- #define __FD_ISSET(fd, s) \
- ({ \
- int __fd = (fd); \
- void *__addr = (void *)&__FDS_BITS (s); \
- int res; \
- __asm__ ("tst1 %1, [%2]; setf nz, %0" \
- : "=r" (res) \
- : "r" (__fd & 0x7), "r" (__addr + (__fd >> 3))); \
- res; \
- })
- #else /* !__GNUC__ */
- #define __FD_SET(d, s) (__FDS_BITS (s)[__FDELT(d)] |= __FDMASK(d))
- #define __FD_CLR(d, s) (__FDS_BITS (s)[__FDELT(d)] &= ~__FDMASK(d))
- #define __FD_ISSET(d, s) ((__FDS_BITS (s)[__FDELT(d)] & __FDMASK(d)) != 0)
- #endif /* __GNUC__ */
|
