gecko/xpcom/tests/TestExpirationTracker.cpp
2012-05-21 12:12:37 +01:00

205 lines
5.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 <stdlib.h>
#include <stdio.h>
#include <prthread.h>
#include "nsExpirationTracker.h"
#include "nsMemory.h"
#include "nsAutoPtr.h"
#include "nsString.h"
#include "nsDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsXPCOM.h"
#include "nsILocalFile.h"
#include "prinrval.h"
#include "nsThreadUtils.h"
namespace TestExpirationTracker {
struct Object {
Object() : mExpired(false) { Touch(); }
void Touch() { mLastUsed = PR_IntervalNow(); mExpired = false; }
nsExpirationState mExpiration;
nsExpirationState* GetExpirationState() { return &mExpiration; }
PRIntervalTime mLastUsed;
bool mExpired;
};
static bool error;
static PRUint32 periodMS = 100;
static PRUint32 ops = 1000;
static PRUint32 iterations = 2;
static bool logging = 0;
static PRUint32 sleepPeriodMS = 50;
static PRUint32 slackMS = 20; // allow this much error
static void SignalError() {
printf("ERROR!\n");
error = true;
}
template <PRUint32 K> class Tracker : public nsExpirationTracker<Object,K> {
public:
Tracker() : nsExpirationTracker<Object,K>(periodMS) {
Object* obj = new Object();
mUniverse.AppendElement(obj);
LogAction(obj, "Created");
}
nsTArray<nsAutoArrayPtr<Object> > mUniverse;
void LogAction(Object* aObj, const char* aAction) {
if (logging) {
printf("%d %p(%d): %s\n", PR_IntervalNow(),
static_cast<void*>(aObj), aObj->mLastUsed, aAction);
}
}
void DoRandomOperation() {
Object* obj;
switch (rand() & 0x7) {
case 0: {
if (mUniverse.Length() < 50) {
obj = new Object();
mUniverse.AppendElement(obj);
nsExpirationTracker<Object,K>::AddObject(obj);
LogAction(obj, "Created and added");
}
break;
}
case 4: {
if (mUniverse.Length() < 50) {
obj = new Object();
mUniverse.AppendElement(obj);
LogAction(obj, "Created");
}
break;
}
case 1: {
obj = mUniverse[PRUint32(rand())%mUniverse.Length()];
if (obj->mExpiration.IsTracked()) {
nsExpirationTracker<Object,K>::RemoveObject(obj);
LogAction(obj, "Removed");
}
break;
}
case 2: {
obj = mUniverse[PRUint32(rand())%mUniverse.Length()];
if (!obj->mExpiration.IsTracked()) {
obj->Touch();
nsExpirationTracker<Object,K>::AddObject(obj);
LogAction(obj, "Added");
}
break;
}
case 3: {
obj = mUniverse[PRUint32(rand())%mUniverse.Length()];
if (obj->mExpiration.IsTracked()) {
obj->Touch();
nsExpirationTracker<Object,K>::MarkUsed(obj);
LogAction(obj, "Marked used");
}
break;
}
}
}
protected:
void NotifyExpired(Object* aObj) {
LogAction(aObj, "Expired");
PRIntervalTime now = PR_IntervalNow();
PRUint32 timeDiffMS = (now - aObj->mLastUsed)*1000/PR_TicksPerSecond();
// See the comment for NotifyExpired in nsExpirationTracker.h for these
// bounds
PRUint32 lowerBoundMS = (K-1)*periodMS - slackMS;
PRUint32 upperBoundMS = K*(periodMS + sleepPeriodMS) + slackMS;
if (logging) {
printf("Checking: %d-%d = %d [%d,%d]\n",
now, aObj->mLastUsed, timeDiffMS, lowerBoundMS, upperBoundMS);
}
if (timeDiffMS < lowerBoundMS || timeDiffMS > upperBoundMS) {
if (timeDiffMS < periodMS && aObj->mExpired) {
// This is probably OK, it probably just expired twice
} else {
SignalError();
}
}
aObj->Touch();
aObj->mExpired = true;
DoRandomOperation();
DoRandomOperation();
DoRandomOperation();
}
};
template <PRUint32 K> static bool test_random() {
srand(K);
error = false;
for (PRUint32 j = 0; j < iterations; ++j) {
Tracker<K> tracker;
PRUint32 i = 0;
for (i = 0; i < ops; ++i) {
if ((rand() & 0xF) == 0) {
// Simulate work that takes time
if (logging) {
printf("SLEEPING for %dms (%d)\n", sleepPeriodMS, PR_IntervalNow());
}
PR_Sleep(PR_MillisecondsToInterval(sleepPeriodMS));
// Process pending timer events
NS_ProcessPendingEvents(nsnull);
}
tracker.DoRandomOperation();
}
}
return !error;
}
static bool test_random3() { return test_random<3>(); }
static bool test_random4() { return test_random<4>(); }
static bool test_random8() { return test_random<8>(); }
typedef bool (*TestFunc)();
#define DECL_TEST(name) { #name, name }
static const struct Test {
const char* name;
TestFunc func;
} tests[] = {
DECL_TEST(test_random3),
DECL_TEST(test_random4),
DECL_TEST(test_random8),
{ nsnull, nsnull }
};
}
using namespace TestExpirationTracker;
int main(int argc, char **argv) {
int count = 1;
if (argc > 1)
count = atoi(argv[1]);
if (NS_FAILED(NS_InitXPCOM2(nsnull, nsnull, nsnull)))
return -1;
while (count--) {
for (const Test* t = tests; t->name != nsnull; ++t) {
printf("%25s : %s\n", t->name, t->func() ? "SUCCESS" : "FAILURE");
}
}
NS_ShutdownXPCOM(nsnull);
return 0;
}