1 /* 2 * Copyright (c) 2006-2018, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /* 8 * File : libc_errno.h 9 * 10 * Change Logs: 11 * Date Author Notes 12 * 2017-10-30 Bernard The first version 13 */ 14 15 #ifndef LIBC_FDSET_H__ 16 #define LIBC_FDSET_H__ 17 18 #include <rtconfig.h> 19 20 #if defined(RT_USING_NEWLIB) || defined(_WIN32) 21 #include <sys/types.h> 22 #if defined(HAVE_SYS_SELECT_H) 23 #include <sys/select.h> 24 #endif 25 26 #else 27 28 #ifdef SAL_USING_POSIX 29 30 #ifdef FD_SETSIZE 31 #undef FD_SETSIZE 32 #endif 33 34 #define FD_SETSIZE DFS_FD_MAX 35 #endif 36 37 # ifndef FD_SETSIZE 38 # define FD_SETSIZE 32 39 # endif 40 41 # define NBBY 8 /* number of bits in a byte */ 42 43 typedef long fd_mask; 44 # define NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */ 45 # ifndef howmany 46 # define howmany(x,y) (((x)+((y)-1))/(y)) 47 # endif 48 49 /* We use a macro for fd_set so that including Sockets.h afterwards 50 can work. */ 51 typedef struct _types_fd_set { 52 fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)]; 53 } _types_fd_set; 54 55 #define fd_set _types_fd_set 56 57 # define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS))) 58 # define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS))) 59 # define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS))) 60 # define FD_ZERO(p) memset((void*)(p), 0, sizeof(*(p))) 61 62 #endif 63 64 #endif 65