| //===-- Macros defined in sys/select.h header file ------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H |
| #define LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H |
| |
| #define FD_SETSIZE 1024 |
| #define __FD_SET_WORD_TYPE unsigned long |
| #define __FD_SET_WORD_SIZE (sizeof(__FD_SET_WORD_TYPE) * 8) |
| #define __FD_SET_ARRAYSIZE (FD_SETSIZE / __FD_SET_WORD_SIZE) |
| |
| #define FD_ZERO(set) \ |
| do { \ |
| unsigned i; \ |
| for (i = 0; i < __FD_SET_ARRAYSIZE; ++i) \ |
| (set)->__set[i] = 0; \ |
| } while (0) |
| |
| #define __FD_WORD(fd) ((fd) / __FD_SET_WORD_SIZE) |
| #define __FD_MASK(fd) \ |
| ((__FD_SET_WORD_TYPE)1) << ((__FD_SET_WORD_TYPE)((fd) % __FD_SET_WORD_SIZE)) |
| |
| #define FD_CLR(fd, set) (void)((set)->__set[__FD_WORD(fd)] &= ~__FD_MASK(fd)) |
| |
| #define FD_SET(fd, set) (void)((set)->__set[__FD_WORD(fd)] |= __FD_MASK(fd)) |
| |
| #define FD_ISSET(fd, set) \ |
| (int)(((set)->__set[__FD_WORD(fd)] & __FD_MASK(fd)) != 0) |
| |
| #endif // LLVM_LIBC_MACROS_SYS_SELECT_MACROS_H |