Loki/tools/RegressionTest2/SmallObjectTest.h

///////////////////////////////////////////////////////////////////////////////
// Unit Test for Loki
//
// Copyright Terje Sletteb<65> and Pavel Vozenilek 2002.
//
// Permission to use, copy, modify, and distribute this software for any
// purpose is hereby granted without fee, provided that this copyright and
// permissions notice appear in all copies and derivatives.
//
// This software is provided "as is" without express or implied warranty.
//
// Last update: September 16, 2002
///////////////////////////////////////////////////////////////////////////////

#ifndef SMALLOBJECTTEST_H
#define SMALLOBJECTTEST_H

#include <cstdlib>
#include <loki/SmallObj.h>
#include "UnitTest.h"

///////////////////////////////////////////////////////////////////////////////
// SmallObjectTest
///////////////////////////////////////////////////////////////////////////////

class SmallObjectTest : public Test
{
public:
	SmallObjectTest() : Test("SmallObject.h") {}

	virtual void execute(TestResult &result)
		{
		printName(result);

		using namespace Loki;

		bool r;

		SmallClass* a = new SmallClass;
		delete a;

		bool smallTest1=a!=NULL;

		a = new SmallClass2;
		delete a;

		bool smallTest2=a!=NULL;

		BigClass* b = new BigClass;
		delete b;

		bool bigTest1=b!=NULL;

		b = new BigClass2;
		delete b;

		bool bigTest2=b!=NULL;

		char* buff = static_cast<char*>(Loki::SmallObject<>::operator new(10));
		Loki::SmallObject<>::operator delete(buff, 10);

		bool test=buff!=NULL;

//		stress_test();

		r=smallTest1 && smallTest2 && bigTest1 && bigTest2 && test;

		testAssert("SmallObject",r,result);

		std::cout << '\n';
		}

private:
	class SmallClass : public Loki::SmallObject<>
	{
		int a;
	};

	class SmallClass2 : public SmallClass
	{
		int b;
	};

	class BigClass : public Loki::SmallObject<>
	{
		char a[200];
	};

	class BigClass2 : public BigClass
	{
		int b;
	};

	class Base
	{
	public:
		virtual ~Base() {}
	};

	class A : public Base, public Loki::SmallObject<>
	{
		int a[1];
	};

	class B : public Base, public Loki::SmallObject<>
	{
		int a[2];
	};

	class C : public Base, public Loki::SmallObject<>
	{
		int a[3];
	};

	class D : public Base, public Loki::SmallObject<>
	{
		int a[4];
	};

	static void stress_test()
	{
		std::vector<Base*> vec;

		vec.reserve(20 * 1024);

		std::srand(1231);

		for (int i = 0; i < 10; ++i)
		{
			for (int j = 0; j < 2 * 1024; ++j)
			{
				Base* p;

				switch (std::rand() % 4)
				{
					case 0: p = new A; break;
					case 1: p = new B; break;
					case 2: p = new C; break;
					case 3: p = new D; break;
				}

				vec.push_back(p);
			}

			for (int j = 0; j < 1024; ++j)
			{
				int pos = std::rand() % vec.size();

				delete vec[pos];

				vec[pos] = 0;
			}
		}

		while (!vec.empty())
		{
			delete vec.back();

			vec.pop_back();
		}
	}
};

#endif