1*bb722a7dSDimitry Andric //===-- Macros defined in sys/select.h header file ------------------------===// 2*bb722a7dSDimitry Andric // 3*bb722a7dSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*bb722a7dSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*bb722a7dSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*bb722a7dSDimitry Andric // 7*bb722a7dSDimitry Andric //===----------------------------------------------------------------------===// 8*bb722a7dSDimitry Andric 9*bb722a7dSDimitry Andric #ifndef LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H 10*bb722a7dSDimitry Andric #define LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H 11*bb722a7dSDimitry Andric 12*bb722a7dSDimitry Andric #define FD_SETSIZE 1024 13*bb722a7dSDimitry Andric #define __FD_SET_WORD_TYPE unsigned long 14*bb722a7dSDimitry Andric #define __FD_SET_WORD_SIZE (sizeof(__FD_SET_WORD_TYPE) * 8) 15*bb722a7dSDimitry Andric #define __FD_SET_ARRAYSIZE (FD_SETSIZE / __FD_SET_WORD_SIZE) 16*bb722a7dSDimitry Andric 17*bb722a7dSDimitry Andric #define FD_ZERO(set) \ 18*bb722a7dSDimitry Andric do { \ 19*bb722a7dSDimitry Andric unsigned i; \ 20*bb722a7dSDimitry Andric for (i = 0; i < __FD_SET_ARRAYSIZE; ++i) \ 21*bb722a7dSDimitry Andric (set)->__set[i] = 0; \ 22*bb722a7dSDimitry Andric } while (0) 23*bb722a7dSDimitry Andric 24*bb722a7dSDimitry Andric #define __FD_WORD(fd) ((fd) / __FD_SET_WORD_SIZE) 25*bb722a7dSDimitry Andric #define __FD_MASK(fd) \ 26*bb722a7dSDimitry Andric ((__FD_SET_WORD_TYPE)1) << ((__FD_SET_WORD_TYPE)((fd) % __FD_SET_WORD_SIZE)) 27*bb722a7dSDimitry Andric 28*bb722a7dSDimitry Andric #define FD_CLR(fd, set) (void)((set)->__set[__FD_WORD(fd)] &= ~__FD_MASK(fd)) 29*bb722a7dSDimitry Andric 30*bb722a7dSDimitry Andric #define FD_SET(fd, set) (void)((set)->__set[__FD_WORD(fd)] |= __FD_MASK(fd)) 31*bb722a7dSDimitry Andric 32*bb722a7dSDimitry Andric #define FD_ISSET(fd, set) \ 33*bb722a7dSDimitry Andric (int)(((set)->__set[__FD_WORD(fd)] & __FD_MASK(fd)) != 0) 34*bb722a7dSDimitry Andric 35*bb722a7dSDimitry Andric #endif // LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H 36