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 #include <sys/select.h> 29 #include <signal.h> 30 #include <pthread.h> 31 32 int 33 pselect(int n, fd_set* readfds, fd_set* writefds, fd_set* errfds, 34 const struct timespec* timeout, const sigset_t* sigmask) 35 { 36 sigset_t oldmask; 37 int result; 38 struct timeval tv, *tv_timeout = NULL; 39 40 if (sigmask != NULL) 41 pthread_sigmask( SIG_SETMASK, sigmask, &oldmask ); 42 43 if (timeout != NULL) { 44 tv_timeout = &tv; 45 tv.tv_sec = timeout->tv_sec; 46 tv.tv_usec = (timeout->tv_nsec + 999)/1000; // round up 47 if (tv.tv_usec >= 1000000) { 48 tv.tv_sec += 1; 49 tv.tv_usec -= 1000000; 50 } 51 } 52 53 result = select( n, readfds, writefds, errfds, tv_timeout ); 54 55 if (sigmask != NULL) 56 pthread_sigmask( SIG_SETMASK, &oldmask, NULL ); 57 58 return result; 59 } 60
