gecko/nsprpub/pr/tests/pollable.c

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2008-06-06 05:36:51 -07:00
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* A test for the pollable events.
*
* A number of threads are in a ring configuration, each waiting on
* a pollable event that is set by its upstream neighbor.
*/
#include "prinit.h"
#include "prio.h"
#include "prthread.h"
#include "prerror.h"
#include "prmem.h"
#include "prlog.h"
#include "prprf.h"
#include "plgetopt.h"
#include <stdlib.h>
#define DEFAULT_THREADS 10
#define DEFAULT_LOOPS 100
PRIntn numThreads = DEFAULT_THREADS;
PRIntn numIterations = DEFAULT_LOOPS;
PRIntervalTime dally = PR_INTERVAL_NO_WAIT;
PRFileDesc *debug_out = NULL;
PRBool debug_mode = PR_FALSE;
PRBool verbosity = PR_FALSE;
typedef struct ThreadData {
PRFileDesc *event;
int index;
struct ThreadData *next;
} ThreadData;
void ThreadRoutine(void *arg)
{
ThreadData *data = (ThreadData *) arg;
PRIntn i;
PRPollDesc pd;
PRInt32 rv;
pd.fd = data->event;
pd.in_flags = PR_POLL_READ;
for (i = 0; i < numIterations; i++) {
rv = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
if (rv == -1) {
PR_fprintf(PR_STDERR, "PR_Poll failed\n");
exit(1);
}
if (verbosity) {
PR_fprintf(debug_out, "thread %d awakened\n", data->index);
}
PR_ASSERT(rv != 0);
PR_ASSERT(pd.out_flags & PR_POLL_READ);
if (PR_WaitForPollableEvent(data->event) == PR_FAILURE) {
PR_fprintf(PR_STDERR, "consume event failed\n");
exit(1);
}
if (dally != PR_INTERVAL_NO_WAIT) {
PR_Sleep(dally);
}
if (verbosity) {
PR_fprintf(debug_out, "thread %d posting event\n", data->index);
}
if (PR_SetPollableEvent(data->next->event) == PR_FAILURE) {
PR_fprintf(PR_STDERR, "post event failed\n");
exit(1);
}
}
}
static void Help(void)
{
debug_out = PR_STDOUT;
PR_fprintf(
debug_out, "Usage: pollable [-c n] [-t n] [-d] [-v] [-G] [-C n] [-D n]\n");
PR_fprintf(
debug_out, "-c n\tloops at thread level (default: %d)\n", DEFAULT_LOOPS);
PR_fprintf(
debug_out, "-t n\tnumber of threads (default: %d)\n", DEFAULT_THREADS);
PR_fprintf(debug_out, "-d\tturn on debugging output (default: FALSE)\n");
PR_fprintf(debug_out, "-v\tturn on verbose output (default: FALSE)\n");
PR_fprintf(debug_out, "-G\tglobal threads only (default: FALSE)\n");
PR_fprintf(debug_out, "-C n\tconcurrency setting (default: 1)\n");
PR_fprintf(debug_out, "-D n\tdally setting (msecs) (default: 0)\n");
} /* Help */
int main(int argc, char **argv)
{
ThreadData selfData;
ThreadData *data;
PRThread **thread;
void *block;
PRIntn i;
PRIntervalTime timeStart, timeEnd;
PRPollDesc pd;
PRInt32 rv;
PRThreadScope thread_scope = PR_LOCAL_THREAD;
PRBool help = PR_FALSE;
PRUintn concurrency = 1;
PRUintn average;
PLOptStatus os;
PLOptState *opt;
PR_STDIO_INIT();
opt = PL_CreateOptState(argc, argv, "hdvc:t:C:GD:");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
if (PL_OPT_BAD == os) {
continue;
}
switch (opt->option) {
case 'v': /* verbose mode */
verbosity = PR_TRUE;
case 'd': /* debug mode */
debug_mode = PR_TRUE;
break;
case 'c': /* loop counter */
numIterations = atoi(opt->value);
break;
case 't': /* thread limit */
numThreads = atoi(opt->value);
break;
case 'C': /* Concurrency limit */
concurrency = atoi(opt->value);
break;
case 'G': /* global threads only */
thread_scope = PR_GLOBAL_THREAD;
break;
case 'D': /* dally */
dally = PR_MillisecondsToInterval(atoi(opt->value));
break;
case 'h': /* help message */
Help();
help = PR_TRUE;
break;
default:
break;
}
}
PL_DestroyOptState(opt);
if (help) {
return 1;
}
if (concurrency > 1) {
PR_SetConcurrency(concurrency);
}
if (PR_TRUE == debug_mode) {
debug_out = PR_STDOUT;
PR_fprintf(debug_out, "Test parameters\n");
PR_fprintf(debug_out, "\tThreads involved: %d\n", numThreads);
PR_fprintf(debug_out, "\tIteration limit: %d\n", numIterations);
PR_fprintf(debug_out, "\tConcurrency: %d\n", concurrency);
PR_fprintf(debug_out, "\tThread type: %s\n",
(PR_GLOBAL_THREAD == thread_scope) ? "GLOBAL" : "LOCAL");
}
/*
* Malloc a block of memory and divide it into data and thread.
*/
block = PR_MALLOC(numThreads * (sizeof(ThreadData) + sizeof(PRThread *)));
if (block == NULL) {
PR_fprintf(PR_STDERR, "cannot malloc, failed\n");
exit(1);
}
data = (ThreadData *) block;
thread = (PRThread **) &data[numThreads];
/* Pollable event */
selfData.event = PR_NewPollableEvent();
if (selfData.event == NULL) {
PR_fprintf(PR_STDERR, "cannot create event: (%ld, %ld)\n",
PR_GetError(), PR_GetOSError());
exit(1);
}
selfData.next = &data[0];
for (i = 0; i < numThreads; i++) {
data[i].event = PR_NewPollableEvent();
if (data[i].event == NULL) {
PR_fprintf(PR_STDERR, "cannot create event: (%ld, %ld)\n",
PR_GetError(), PR_GetOSError());
exit(1);
}
data[i].index = i;
if (i != numThreads - 1) {
data[i].next = &data[i + 1];
} else {
data[i].next = &selfData;
}
thread[i] = PR_CreateThread(PR_USER_THREAD,
ThreadRoutine, &data[i], PR_PRIORITY_NORMAL,
thread_scope, PR_JOINABLE_THREAD, 0);
if (thread[i] == NULL) {
PR_fprintf(PR_STDERR, "cannot create thread\n");
exit(1);
}
}
timeStart = PR_IntervalNow();
pd.fd = selfData.event;
pd.in_flags = PR_POLL_READ;
for (i = 0; i < numIterations; i++) {
if (dally != PR_INTERVAL_NO_WAIT) {
PR_Sleep(dally);
}
if (verbosity) {
PR_fprintf(debug_out, "main thread posting event\n");
}
if (PR_SetPollableEvent(selfData.next->event) == PR_FAILURE) {
PR_fprintf(PR_STDERR, "set event failed\n");
exit(1);
}
rv = PR_Poll(&pd, 1, PR_INTERVAL_NO_TIMEOUT);
if (rv == -1) {
PR_fprintf(PR_STDERR, "wait failed\n");
exit(1);
}
PR_ASSERT(rv != 0);
PR_ASSERT(pd.out_flags & PR_POLL_READ);
if (verbosity) {
PR_fprintf(debug_out, "main thread awakened\n");
}
if (PR_WaitForPollableEvent(selfData.event) == PR_FAILURE) {
PR_fprintf(PR_STDERR, "consume event failed\n");
exit(1);
}
}
timeEnd = PR_IntervalNow();
if (debug_mode) {
average = PR_IntervalToMicroseconds(timeEnd - timeStart)
/ (numIterations * numThreads);
PR_fprintf(debug_out, "Average switch times %d usecs for %d threads\n",
average, numThreads);
}
for (i = 0; i < numThreads; i++) {
if (PR_JoinThread(thread[i]) == PR_FAILURE) {
PR_fprintf(PR_STDERR, "join thread failed\n");
exit(1);
}
PR_DestroyPollableEvent(data[i].event);
}
PR_DELETE(block);
PR_DestroyPollableEvent(selfData.event);
PR_fprintf(PR_STDOUT, "PASSED\n");
return 0;
}