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many_cv.c
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Netscape Portable Runtime (NSPR).
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998-2000
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #include "prinit.h"
00039 #include "prprf.h"
00040 #include "prthread.h"
00041 #include "prcvar.h"
00042 #include "prlock.h"
00043 #include "prlog.h"
00044 #include "prmem.h"
00045 
00046 #include "primpl.h"
00047 
00048 #include "plgetopt.h"
00049 
00050 #include <stdlib.h>
00051 
00052 static PRInt32 Random(void)
00053 {
00054     PRInt32 ran = rand() >> 16;
00055     return ran;
00056 }  /* Random */
00057 
00058 static void Help(void)
00059 {
00060     PRFileDesc *err = PR_GetSpecialFD(PR_StandardError);
00061     PR_fprintf(err, "many_cv usage: [-c n] [-l n] [-h]\n");
00062     PR_fprintf(err, "\t-c n Number of conditions per lock       (default: 10)\n");
00063     PR_fprintf(err, "\t-l n Number of times to loop the test    (default:  1)\n");
00064     PR_fprintf(err, "\t-h   This message and nothing else\n");
00065 }  /* Help */
00066 
00067 static PRIntn PR_CALLBACK RealMain( PRIntn argc, char **argv )
00068 {
00069     PLOptStatus os;
00070     PRIntn index, nl;
00071     PRLock *ml = NULL;
00072     PRCondVar **cv = NULL;
00073     PRBool stats = PR_FALSE;
00074     PRIntn nc, loops = 1, cvs = 10;
00075     PRFileDesc *err = PR_GetSpecialFD(PR_StandardError);
00076     PLOptState *opt = PL_CreateOptState(argc, argv, "hsc:l:");
00077 
00078     while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
00079     {
00080         if (PL_OPT_BAD == os) continue;
00081         switch (opt->option)
00082         {
00083         case 's':  /* number of CVs to association with lock */
00084             stats = PR_TRUE;
00085             break;
00086         case 'c':  /* number of CVs to association with lock */
00087             cvs = atoi(opt->value);
00088             break;
00089         case 'l':  /* number of times to run the tests */
00090             loops = atoi(opt->value);
00091             break;
00092         case 'h':  /* user wants some guidance */
00093          default:
00094             Help();  /* so give him an earful */
00095             return 2;  /* but not a lot else */
00096         }
00097     }
00098     PL_DestroyOptState(opt);
00099 
00100     PR_fprintf(err, "Settings\n");
00101     PR_fprintf(err, "\tConditions / lock: %d\n", cvs);
00102     PR_fprintf(err, "\tLoops to run test: %d\n", loops);
00103 
00104     ml = PR_NewLock();
00105     PR_ASSERT(NULL != ml);
00106 
00107     cv = (PRCondVar**)PR_CALLOC(sizeof(PRCondVar*) * cvs);
00108     PR_ASSERT(NULL != cv);
00109 
00110     for (index = 0; index < cvs; ++index)
00111     {
00112         cv[index] = PR_NewCondVar(ml);
00113         PR_ASSERT(NULL != cv[index]);
00114     }
00115 
00116     for (index = 0; index < loops; ++index)
00117     {
00118         PR_Lock(ml);
00119         for (nl = 0; nl < cvs; ++nl)
00120         {
00121             PRInt32 ran = Random() % 8;
00122             if (0 == ran) PR_NotifyAllCondVar(cv[nl]);
00123             else for (nc = 0; nc < ran; ++nc)
00124                 PR_NotifyCondVar(cv[nl]);
00125         }
00126         PR_Unlock(ml);
00127     }
00128 
00129     for (index = 0; index < cvs; ++index)
00130         PR_DestroyCondVar(cv[index]);
00131 
00132     PR_DELETE(cv);
00133 
00134     PR_DestroyLock(ml);
00135     
00136     printf("PASS\n");
00137 
00138     PT_FPrintStats(err, "\nPThread Statistics\n");
00139     return 0;
00140 }
00141 
00142 
00143 PRIntn main(PRIntn argc, char **argv)
00144 {
00145     PRIntn rv;
00146     
00147     PR_STDIO_INIT();
00148     rv = PR_Initialize(RealMain, argc, argv, 0);
00149     return rv;
00150 }  /* main */