RetroZilla/ipc/ipcd/extensions/lock/test/TestIPCLocks.cpp

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/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* ***** 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 Mozilla IPC.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* 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 ***** */
// This test program spawns N copies of itself, and each copy spawns M threads.
// Each thread acquires and releases a named, interprocess lock.
// Randomized delays are injected at various points to exercise the system, and
// help expose any race conditions that may exist.
//
// Usage: TestIPCLocks [-N]
#include <stdlib.h>
#include <stdio.h>
#include "ipcILockService.h"
#include "ipcLockCID.h"
#include "nsServiceManagerUtils.h"
#include "nsIEventQueueService.h"
#include "nsCOMPtr.h"
#include "nsXPCOM.h"
#include "prproces.h"
#include "prprf.h"
#if defined(XP_UNIX) || defined(XP_OS2) || defined(XP_BEOS)
#include <unistd.h>
static unsigned GetPID()
{
return (unsigned) getpid();
}
#elif defined(XP_WIN)
#include <windows.h>
static unsigned GetPID()
{
return (unsigned) GetCurrentProcessId();
}
#else
static unsigned int GetPID()
{
return 0; // implement me!
}
#endif
static void LOG(const char *fmt, ... )
{
va_list ap;
va_start(ap, fmt);
PRUint32 nb = 0;
char buf[512];
nb = PR_snprintf(buf, sizeof(buf), "[%u:%p] ", GetPID(), PR_GetCurrentThread());
PR_vsnprintf(buf + nb, sizeof(buf) - nb, fmt, ap);
buf[sizeof(buf) - 1] = '\0';
fwrite(buf, strlen(buf), 1, stdout);
fflush(stdout);
va_end(ap);
}
static void RandomSleep(PRUint32 fromMS, PRUint32 toMS)
{
PRUint32 ms = fromMS + (PRUint32) ((toMS - fromMS) * ((double) rand() / RAND_MAX));
//LOG("putting thread to sleep for %u ms\n", ms);
PR_Sleep(PR_MillisecondsToInterval(ms));
}
static ipcILockService *gLockService;
PR_STATIC_CALLBACK(void) TestThread(void *arg)
{
const char *lockName = (const char *) arg;
LOG("entering TestThread [lock=%s]\n", lockName);
nsresult rv;
RandomSleep(1000, 1100);
//LOG("done sleeping\n");
rv = gLockService->AcquireLock(lockName, PR_TRUE);
if (NS_SUCCEEDED(rv))
{
//LOG("acquired lock \"%s\"\n", lockName);
RandomSleep(500, 1000);
//LOG("releasing lock \"%s\"\n", lockName);
rv = gLockService->ReleaseLock(lockName);
if (NS_FAILED(rv))
{
LOG("failed to release lock [rv=%x]\n", rv);
NS_ERROR("failed to release lock");
}
}
else
{
LOG("failed to acquire lock [rv=%x]\n", rv);
NS_NOTREACHED("failed to acquire lock");
}
LOG("exiting TestThread [lock=%s rv=%x]\n", lockName, rv);
}
static const char *kLockNames[] = {
"foopy",
"test",
"1",
"xyz",
"moz4ever",
nsnull
};
static nsresult DoTest()
{
nsresult rv;
nsCOMPtr<nsIEventQueueService> eqs =
do_GetService(NS_EVENTQUEUESERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
rv = eqs->CreateMonitoredThreadEventQueue();
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIEventQueue> eq;
rv = eqs->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(eq));
if (NS_FAILED(rv))
return rv;
nsCOMPtr<ipcILockService> lockService =
do_GetService(IPC_LOCKSERVICE_CONTRACTID);
gLockService = lockService;
PRThread *threads[10] = {0};
int i = 0;
for (const char **lockName = kLockNames; *lockName; ++lockName, ++i)
{
threads[i] = PR_CreateThread(PR_USER_THREAD,
TestThread,
(void *) *lockName,
PR_PRIORITY_NORMAL,
PR_GLOBAL_THREAD,
PR_JOINABLE_THREAD,
0);
}
for (i=0; threads[i]; ++i)
{
PR_JoinThread(threads[i]);
threads[i] = nsnull;
}
gLockService = nsnull;
LOG("joined with all threads; exiting DoTest\n");
return NS_OK;
}
int main(int argc, char **argv)
{
LOG("entering main\n");
int numProcs = 10;
// if this is a child process, then just run the test
if (argc > 1)
{
if (strcmp(argv[1], "-child") == 0)
{
RandomSleep(1000, 1000);
LOG("running child test\n");
NS_InitXPCOM2(nsnull, nsnull, nsnull);
DoTest();
NS_ShutdownXPCOM(nsnull);
return 0;
}
else if (argv[1][0] == '-')
{
// argument is a number
numProcs = atoi(argv[1] + 1);
if (numProcs == 0)
{
printf("### usage: TestIPCLocks [-N]\n"
"where, N is the number of test processes to spawn.\n");
return -1;
}
}
}
LOG("sleeping for 1 second\n");
PR_Sleep(PR_SecondsToInterval(1));
PRProcess **procs = (PRProcess **) malloc(sizeof(PRProcess*) * numProcs);
int i;
// else, spawn the child processes
for (i=0; i<numProcs; ++i)
{
char *const argv[] = {"./TestIPCLocks", "-child", nsnull};
LOG("spawning child test\n");
procs[i] = PR_CreateProcess("./TestIPCLocks", argv, nsnull, nsnull);
}
PRInt32 exitCode;
for (i=0; i<numProcs; ++i)
PR_WaitProcess(procs[i], &exitCode);
return 0;
}