1be4e4257SSiva Chandra Reddy //===-- Macros defined in sys/select.h header file ------------------------===// 2be4e4257SSiva Chandra Reddy // 3be4e4257SSiva Chandra Reddy // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4be4e4257SSiva Chandra Reddy // See https://llvm.org/LICENSE.txt for license information. 5be4e4257SSiva Chandra Reddy // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6be4e4257SSiva Chandra Reddy // 7be4e4257SSiva Chandra Reddy //===----------------------------------------------------------------------===// 8be4e4257SSiva Chandra Reddy 9*330793c9SNick Desaulniers #ifndef LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H 10*330793c9SNick Desaulniers #define LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H 11be4e4257SSiva Chandra Reddy 12be4e4257SSiva Chandra Reddy #define FD_SETSIZE 1024 13be4e4257SSiva Chandra Reddy #define __FD_SET_WORD_TYPE unsigned long 14be4e4257SSiva Chandra Reddy #define __FD_SET_WORD_SIZE (sizeof(__FD_SET_WORD_TYPE) * 8) 15be4e4257SSiva Chandra Reddy #define __FD_SET_ARRAYSIZE (FD_SETSIZE / __FD_SET_WORD_SIZE) 16be4e4257SSiva Chandra Reddy 17be4e4257SSiva Chandra Reddy #define FD_ZERO(set) \ 18be4e4257SSiva Chandra Reddy do { \ 19be4e4257SSiva Chandra Reddy unsigned i; \ 20be4e4257SSiva Chandra Reddy for (i = 0; i < __FD_SET_ARRAYSIZE; ++i) \ 21be4e4257SSiva Chandra Reddy (set)->__set[i] = 0; \ 22be4e4257SSiva Chandra Reddy } while (0) 23be4e4257SSiva Chandra Reddy 24be4e4257SSiva Chandra Reddy #define __FD_WORD(fd) ((fd) / __FD_SET_WORD_SIZE) 25be4e4257SSiva Chandra Reddy #define __FD_MASK(fd) \ 26be4e4257SSiva Chandra Reddy ((__FD_SET_WORD_TYPE)1) << ((__FD_SET_WORD_TYPE)((fd) % __FD_SET_WORD_SIZE)) 27be4e4257SSiva Chandra Reddy 28be4e4257SSiva Chandra Reddy #define FD_CLR(fd, set) (void)((set)->__set[__FD_WORD(fd)] &= ~__FD_MASK(fd)) 29be4e4257SSiva Chandra Reddy 30be4e4257SSiva Chandra Reddy #define FD_SET(fd, set) (void)((set)->__set[__FD_WORD(fd)] |= __FD_MASK(fd)) 31be4e4257SSiva Chandra Reddy 32be4e4257SSiva Chandra Reddy #define FD_ISSET(fd, set) \ 33be4e4257SSiva Chandra Reddy (int)(((set)->__set[__FD_WORD(fd)] & __FD_MASK(fd)) != 0) 34be4e4257SSiva Chandra Reddy 35*330793c9SNick Desaulniers #endif // LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H 36