1 /* $OpenBSD: switch.c,v 1.1.1.1 2001/08/15 14:37:16 fgsch Exp $ */ 2 /* 3 * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors, 4 * proven@mit.edu All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Chris Provenzano, 17 * the University of California, Berkeley, and contributors. 18 * 4. Neither the name of Chris Provenzano, the University, nor the names of 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR 26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* ==== test_switch.c ======================================================== 36 * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu 37 * 38 * Description : Test context switch functionality. 39 * 40 * 1.00 93/08/04 proven 41 * -Started coding this file. 42 */ 43 44 #include <pthread.h> 45 #include <stdio.h> 46 #include <errno.h> 47 #include <unistd.h> 48 #include <stdlib.h> 49 #include "test.h" 50 51 const char buf[] = "abcdefghijklmnopqrstuvwxyz"; 52 char x[sizeof(buf)]; 53 int fd = 1; 54 55 volatile int ending = 0; 56 57 /* ========================================================================== 58 * usage(); 59 */ 60 void usage(void) 61 { 62 printf("test_switch [-d?] [-c count]\n"); 63 printf("count must be between 2 and 26\n"); 64 errno = 0; 65 } 66 67 void * 68 new_thread(arg) 69 void *arg; 70 { 71 SET_NAME("writer"); 72 while (!ending) { 73 CHECKe(write (fd, (char *) arg, 1)); 74 x[(char *)arg - buf] = 1; 75 } 76 return NULL; 77 } 78 79 int 80 main(argc, argv) 81 int argc; 82 char **argv; 83 { 84 pthread_t thread; 85 int count = 4; 86 int debug = 0; 87 int eof = 0; 88 long i; 89 90 /* Getopt variables. */ 91 extern int optind, opterr; 92 extern char *optarg; 93 94 while (!eof) 95 switch (getopt (argc, argv, "c:d?")) 96 { 97 case EOF: 98 eof = 1; 99 break; 100 case 'd': 101 debug++; 102 break; 103 case 'c': 104 count = atoi(optarg); 105 if ((count > 26) || (count < 2)) { 106 count = 2; 107 } 108 break; 109 case '?': 110 usage(); 111 return(OK); 112 default: 113 usage(); 114 return(NOTOK); 115 } 116 117 /* create the threads */ 118 for (i = 0; i < count; i++) 119 CHECKr(pthread_create(&thread, NULL, new_thread, 120 (void*)(buf+i))); 121 122 /* give all threads a chance to run */ 123 sleep (4); 124 125 ending = 1; 126 for (i = 0; i < count; i++) 127 ASSERT(x[i]); /* make sure each thread ran */ 128 129 SUCCEED; 130 } 131