1 /* 2 * Copyright 2002-2024, Haiku, Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _SYS_SELECT_H 6 #define _SYS_SELECT_H 7 8 9 #include <config/types.h> 10 11 #include <sys/time.h> 12 #include <signal.h> 13 #include <string.h> 14 15 16 /* Custom FD_SETSIZEs can be defined if more bits are needed, but the default 17 * should suffice for most uses. */ 18 #ifndef FD_SETSIZE 19 # define FD_SETSIZE 1024 20 #endif 21 22 typedef __haiku_uint32 fd_mask; 23 24 #define NFDBITS (sizeof(fd_mask) * 8) /* bits per mask */ 25 26 typedef struct fd_set { 27 fd_mask bits[((FD_SETSIZE) + ((NFDBITS) - 1)) / (NFDBITS)]; 28 } fd_set; 29 30 #define _FD_BITSINDEX(fd) ((fd) / NFDBITS) 31 #define _FD_BIT(fd) (1L << ((fd) % NFDBITS)) 32 33 #define FD_ZERO(set) memset((set), 0, sizeof(fd_set)) 34 #define FD_SET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] |= _FD_BIT(fd)) 35 #define FD_CLR(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] &= ~_FD_BIT(fd)) 36 #define FD_ISSET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] & _FD_BIT(fd)) 37 #define FD_COPY(source, target) (*(target) = *(source)) 38 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 extern int pselect(int numBits, struct fd_set *readBits, struct fd_set *writeBits, 45 struct fd_set *errorBits, const struct timespec *timeout, const sigset_t *sigMask); 46 extern int select(int numBits, struct fd_set *readBits, struct fd_set *writeBits, 47 struct fd_set *errorBits, struct timeval *timeout); 48 49 #ifdef __cplusplus 50 } 51 #endif 52 53 54 #endif /* _SYS_SELECT_H */ 55