1 // src/select.hh 2 // This file is part of libpbe; see http://decimail.org 3 // (C) 2004 Philip Endecott 4 5 // This program is free software; you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation; either version 2 of the License, or 8 // any later version. 9 // 10 // This program is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU General Public License for more details. 14 // 15 // You should have received a copy of the GNU General Public License 16 // along with this program; if not, write to the Free Software 17 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 #ifndef libpbe_select_hh 19 #define libpbe_select_hh 20 21 // User-friendly wrappers around select(). 22 // Take various numbers of file descriptors and an optional timeout. 23 // Naming scheme is "r" for "readable", "t" for "timeout". 24 // i.e. select_rr waits for either of two fds to be readable. 25 // The return value is the file descriptor that has become useable, 26 // i.e. select_rr(4,9) can return 4 or 9. If the timeout expires, 27 // -1 is returned. -2 can also be returned but I can't recall when. 28 29 int select_r (int fd1); 30 int select_rr(int fd1, int fd2); 31 int select_rt(int fd1, float timeout); 32 33 34 #endif 35