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1//===-- Macros defined in sys/select.h header file ------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H10#define LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H11 12#define FD_SETSIZE 102413#define __FD_SET_WORD_TYPE unsigned long14#define __FD_SET_WORD_SIZE (sizeof(__FD_SET_WORD_TYPE) * 8)15#define __FD_SET_ARRAYSIZE (FD_SETSIZE / __FD_SET_WORD_SIZE)16 17#define FD_ZERO(set) \18 do { \19 unsigned i; \20 for (i = 0; i < __FD_SET_ARRAYSIZE; ++i) \21 (set)->__set[i] = 0; \22 } while (0)23 24#define __FD_WORD(fd) ((fd) / __FD_SET_WORD_SIZE)25#define __FD_MASK(fd) \26 ((__FD_SET_WORD_TYPE)1) << ((__FD_SET_WORD_TYPE)((fd) % __FD_SET_WORD_SIZE))27 28#define FD_CLR(fd, set) (void)((set)->__set[__FD_WORD(fd)] &= ~__FD_MASK(fd))29 30#define FD_SET(fd, set) (void)((set)->__set[__FD_WORD(fd)] |= __FD_MASK(fd))31 32#define FD_ISSET(fd, set) \33 (int)(((set)->__set[__FD_WORD(fd)] & __FD_MASK(fd)) != 0)34 35#endif // LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H36