1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _SYS_SELECT_H_ 30 #define _SYS_SELECT_H_ 31 32 #include <linux/time.h> 33 #include <signal.h> 34 #include <sys/cdefs.h> 35 #include <sys/types.h> 36 37 __BEGIN_DECLS 38 39 #define FD_SETSIZE 1024 40 #define NFDBITS (8 * sizeof(unsigned long)) 41 #define __FDSET_LONGS (FD_SETSIZE/NFDBITS) 42 43 typedef struct { 44 unsigned long fds_bits[__FDSET_LONGS]; 45 } fd_set; 46 47 #define __FDELT(fd) ((fd) / NFDBITS) 48 #define __FDMASK(fd) (1UL << ((fd) % NFDBITS)) 49 #define __FDS_BITS(set) (((fd_set*)(set))->fds_bits) 50 51 /* Inline loop so we don't have to declare memset. */ 52 #define FD_ZERO(set) \ 53 do { \ 54 size_t __i; \ 55 for (__i = 0; __i < __FDSET_LONGS; ++__i) { \ 56 (set)->fds_bits[__i] = 0; \ 57 } \ 58 } while (0) 59 60 extern void __FD_CLR_chk(int, fd_set*, size_t); 61 extern void __FD_SET_chk(int, fd_set*, size_t); 62 extern int __FD_ISSET_chk(int, fd_set*, size_t); 63 64 #if defined(__BIONIC_FORTIFY) 65 #define FD_CLR(fd, set) __FD_CLR_chk(fd, set, __bos(set)) 66 #define FD_SET(fd, set) __FD_SET_chk(fd, set, __bos(set)) 67 #define FD_ISSET(fd, set) __FD_ISSET_chk(fd, set, __bos(set)) 68 #else 69 #define FD_CLR(fd, set) (__FDS_BITS(set)[__FDELT(fd)] &= ~__FDMASK(fd)) 70 #define FD_SET(fd, set) (__FDS_BITS(set)[__FDELT(fd)] |= __FDMASK(fd)) 71 #define FD_ISSET(fd, set) ((__FDS_BITS(set)[__FDELT(fd)] & __FDMASK(fd)) != 0) 72 #endif /* defined(__BIONIC_FORTIFY) */ 73 74 extern int select(int, fd_set*, fd_set*, fd_set*, struct timeval*); 75 extern int pselect(int, fd_set*, fd_set*, fd_set*, const struct timespec*, const sigset_t*); 76 77 __END_DECLS 78 79 #endif /* _SYS_SELECT_H_ */ 80
