/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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;

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