1/* 2 * Copyright 2002-2012 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 14 15/* If FD_SET is already defined, only the select() prototype is 16 * exported in this header. 17 */ 18#ifndef FD_SET 19 20/* You can define your own FDSETSIZE if you need more bits - but 21 * it should be enough for most uses. 22 */ 23#ifndef FD_SETSIZE 24# define FD_SETSIZE 1024 25#endif 26 27typedef __haiku_uint32 fd_mask; 28 29#ifndef _howmany 30# define _howmany(x, y) (((x) + ((y) - 1)) / (y)) 31#endif 32 33#ifndef howmany 34# define howmany(x, y) (((x) + ((y) - 1)) / (y)) 35#endif 36 37#define NFDBITS (sizeof(fd_mask) * 8) /* bits per mask */ 38 39typedef struct fd_set { 40 fd_mask bits[_howmany(FD_SETSIZE, NFDBITS)]; 41} fd_set; 42 43#define _FD_BITSINDEX(fd) ((fd) / NFDBITS) 44#define _FD_BIT(fd) (1L << ((fd) % NFDBITS)) 45 46/* FD_ZERO uses memset */ 47#include <string.h> 48 49#define FD_ZERO(set) memset((set), 0, sizeof(fd_set)) 50#define FD_SET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] |= _FD_BIT(fd)) 51#define FD_CLR(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] &= ~_FD_BIT(fd)) 52#define FD_ISSET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] & _FD_BIT(fd)) 53#define FD_COPY(source, target) (*(target) = *(source)) 54 55#endif /* FD_SET */ 56 57#ifdef __cplusplus 58extern "C" { 59#endif 60 61extern int pselect(int numBits, struct fd_set *readBits, struct fd_set *writeBits, 62 struct fd_set *errorBits, const struct timespec *timeout, const sigset_t *sigMask); 63extern int select(int numBits, struct fd_set *readBits, struct fd_set *writeBits, 64 struct fd_set *errorBits, struct timeval *timeout); 65 66#ifdef __cplusplus 67} 68#endif 69 70#endif /* _SYS_SELECT_H */ 71