/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "prinit.h"
#include "prprf.h"
#include "prthread.h"
#include "prcvar.h"
#include "prlock.h"
#include "prlog.h"
#include "prmem.h"

#include "primpl.h"

#include "plgetopt.h"

#include <stdlib.h>

static PRInt32
RandomNum(void)
{
    PRInt32 ran = rand() >> 16;
    return ran;
} /* RandomNum */

static void
Help(void)
{
    PRFileDesc* err = PR_GetSpecialFD(PR_StandardError);
    PR_fprintf(err, "many_cv usage: [-c n] [-l n] [-h]\n");
    PR_fprintf(err, "\t-c n Number of conditions per lock       (default: 10)\n");
    PR_fprintf(err, "\t-l n Number of times to loop the test    (default:  1)\n");
    PR_fprintf(err, "\t-h   This message and nothing else\n");
} /* Help */

static PRIntn PR_CALLBACK
RealMain(PRIntn argc, char** argv)
{
    PLOptStatus os;
    PRIntn index, nl;
    PRLock* ml = NULL;
    PRCondVar** cv = NULL;
    PRBool stats = PR_FALSE;
    PRIntn nc, loops = 1, cvs = 10;
    PRFileDesc* err = PR_GetSpecialFD(PR_StandardError);
    PLOptState* opt = PL_CreateOptState(argc, argv, "hsc:l:");

    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
        if (PL_OPT_BAD == os) {
            continue;
        }
        switch (opt->option) {
            case 's': /* number of CVs to association with lock */
                stats = PR_TRUE;
                break;
            case 'c': /* number of CVs to association with lock */
                cvs = atoi(opt->value);
                break;
            case 'l': /* number of times to run the tests */
                loops = atoi(opt->value);
                break;
            case 'h': /* user wants some guidance */
            default:
                Help();   /* so give him an earful */
                return 2; /* but not a lot else */
        }
    }
    PL_DestroyOptState(opt);

    PR_fprintf(err, "Settings\n");
    PR_fprintf(err, "\tConditions / lock: %d\n", cvs);
    PR_fprintf(err, "\tLoops to run test: %d\n", loops);

    ml = PR_NewLock();
    PR_ASSERT(NULL != ml);

    cv = (PRCondVar**)PR_CALLOC(sizeof(PRCondVar*) * cvs);
    PR_ASSERT(NULL != cv);

    for (index = 0; index < cvs; ++index) {
        cv[index] = PR_NewCondVar(ml);
        PR_ASSERT(NULL != cv[index]);
    }

    for (index = 0; index < loops; ++index) {
        PR_Lock(ml);
        for (nl = 0; nl < cvs; ++nl) {
            PRInt32 ran = RandomNum() % 8;
            if (0 == ran) {
                PR_NotifyAllCondVar(cv[nl]);
            } else
                for (nc = 0; nc < ran; ++nc) {
                    PR_NotifyCondVar(cv[nl]);
                }
        }
        PR_Unlock(ml);
    }

    for (index = 0; index < cvs; ++index) {
        PR_DestroyCondVar(cv[index]);
    }

    PR_DELETE(cv);

    PR_DestroyLock(ml);

    printf("PASS\n");

    PT_FPrintStats(err, "\nPThread Statistics\n");
    return 0;
}

int
main(int argc, char** argv)
{
    PRIntn rv;

    rv = PR_Initialize(RealMain, argc, argv, 0);
    return rv;
} /* main */