/*
 * Copyright (c) 2007, Michael Feathers, James Grenning, Bas Vodde and Timo Puronen
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE EARLIER MENTIONED AUTHORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "MemoryLeakWarning.h"

#include <e32base.h>

MemoryLeakWarning* MemoryLeakWarning::_latest = NULL;

// naming convention due to CppUTest generic class name
class MemoryLeakWarningData : public CBase {
public:
    TInt iInitialAllocCells;
    TInt iExpectedLeaks;
    TInt iInitialThreadHandleCount;
    TInt iInitialProcessHandleCount;
};

MemoryLeakWarning::MemoryLeakWarning()
{
    _latest = this;
    CreateData();
}

MemoryLeakWarning::~MemoryLeakWarning()
{
    DestroyData();
}

void MemoryLeakWarning::Enable()
{
}

const char* MemoryLeakWarning::FinalReport(int toBeDeletedLeaks)
{
    TInt cellDifference(User::CountAllocCells() - _impl->iInitialAllocCells);
    if( cellDifference != toBeDeletedLeaks ) {
        return "Heap imbalance after test\n";
    }

    TInt processHandles;
    TInt threadHandles;
    RThread().HandleCount(processHandles, threadHandles);

    if(_impl->iInitialProcessHandleCount != processHandles ||
        _impl->iInitialThreadHandleCount != threadHandles) {
        return "Handle count imbalance after test\n";
    }

    return "";
}

void MemoryLeakWarning::CheckPointUsage()
{
    _impl->iInitialAllocCells = User::CountAllocCells();
    RThread().HandleCount(_impl->iInitialProcessHandleCount, _impl->iInitialThreadHandleCount);
}

bool MemoryLeakWarning::UsageIsNotBalanced()
{
    TInt allocatedCells(User::CountAllocCells());
    if(_impl->iExpectedLeaks != 0) {
        TInt difference(Abs(_impl->iInitialAllocCells - allocatedCells));
        return difference != _impl->iExpectedLeaks;
    }
    return allocatedCells != _impl->iInitialAllocCells;
}

const char* MemoryLeakWarning::Message()
{
    return "";
}

void MemoryLeakWarning::ExpectLeaks(int n)
{
    _impl->iExpectedLeaks = n;
}

// this method leaves (no naming convention followed due to CppUTest framework
void MemoryLeakWarning::CreateData()
{
    _impl = new(ELeave) MemoryLeakWarningData();
}

void MemoryLeakWarning::DestroyData()
{
    delete _impl;
    _impl = NULL;
}

MemoryLeakWarning* MemoryLeakWarning::GetLatest()
{
    return _latest;
}

void MemoryLeakWarning::SetLatest(MemoryLeakWarning* latest)
{
    _latest = latest;
}