1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1995-1998, 2000 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* LINTLIBRARY */ 28 29 /* 30 * wtimeout.c 31 * 32 * XCurses Library 33 * 34 * Copyright 1990, 1994 by Mortice Kern Systems Inc. All rights reserved. 35 * 36 */ 37 38 #ifdef M_RCSID 39 #ifndef lint 40 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/wtimeout.c 1.1 " 41 "1995/06/19 16:12:14 ant Exp $"; 42 #endif 43 #endif 44 45 #include <private.h> 46 47 /* 48 * Set blocking or non-blocking read for a specified window. 49 * The delay is in milliseconds. 50 */ 51 void 52 wtimeout(WINDOW *w, int delay) 53 { 54 if (delay < 0) { 55 /* Blocking mode */ 56 w->_vmin = 1; 57 w->_vtime = 0; 58 } else { 59 /* Non-Block (0 == delay) and delayed (0 < delay) */ 60 w->_vmin = 0; 61 62 /* 63 * VTIME is in 1/10 of second 64 * w->_vtime value will be set to termios.c_cc[VMIN]. 65 * Since c_cc[VMIN] is an unsigned char type, the value 66 * to be set needs to be smaller than or equal to 255. 67 * Also 'delay' is in milliseconds, so it is rounted up 68 * to the nearest 10th of a second. Only when 'delay' is 69 * equal to 0, w->_vtime should become 0; otherwise, 70 * it should become a positive value. The previous version 71 * of this code was using the expression "(delay + 50) /100", 72 * which was incorrect. 73 */ 74 w->_vtime = (delay > 25500) ? 255 : (delay + 99) / 100; 75 } 76 } 77