// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// e32test\prime\t_semutx.cpp

// Tests the RSemaphore, RMutex and RCriticalSection classes

// Overview:

// Tests the RSemaphore, RMutex and RCriticalSection classes

// API Information:

// RSemaphore, RMutex, RCriticalSection

// Details:

// - Test RSemaphore and RMutex with the producer/consumer scenario.

// Create two threads, use signal and wait to coordinate the

// threads. Verify results are as expected.

// - Calculate the time required to create, resume and close a thread.

// - Test RSemaphore::Wait(timeout) in a variety ways and timeout 

// values. Verify results are as expected.

// - Test RMutex via two threads which write to an array. The writing

// and updating of the index is wrapped within a mutex pair. Verify 

// results are as expected.

// - Test RCriticalSection via two threads which write to an array. The 

// writing and updating of the index is wrapped within a critical section

// pair. Verify results are as expected.

// Platforms/Drives/Compatibility:

// All.

// Assumptions/Requirement/Pre-requisites:

// Failures and causes:

// Base Port information:

// 

//

#include <e32test.h>

const TInt KMaxBufferSize=10;

const TInt KMaxArraySize=10;

const TInt KNumProducerItems=100;

enum {EThread1ID=1,EThread2ID};

RTest test(_L("T_SEMUTX"));

RMutex mutex;

RCriticalSection criticalSn;	

TInt thread1Count,thread2Count;

TInt arrayIndex;

TInt array[KMaxArraySize];  

TInt consumerArray[KNumProducerItems];

RSemaphore slotAvailable,itemAvailable;  

class CStack

	{

public:	   

	CStack() {iCount=0;};

	void Push(TInt aItem) {iStack[iCount++]=aItem;};

	TInt Pop(void) {return(iStack[--iCount]);};

private:

	TInt iStack[KMaxBufferSize];

	TInt iCount;

	};

CStack stack;

TInt Producer(TAny*)

	{

	for(TInt ii=0;ii<KNumProducerItems;ii++)

		{

		slotAvailable.Wait();

		mutex.Wait();

		stack.Push(ii);

		mutex.Signal();

		itemAvailable.Signal();

		}

	return(KErrNone);

	}

TInt Consumer(TAny*)

	{

	TInt item;

	for(TInt ii=0;ii<KNumProducerItems;ii++)

		{

		itemAvailable.Wait();

		mutex.Wait();

		item=stack.Pop();

		mutex.Signal();

		slotAvailable.Signal();

		consumerArray[item]=item;

		}

	return(KErrNone);

	}

void BusyWait(TInt aMicroseconds)

	{

	TTime begin;

	begin.HomeTime();

	FOREVER

		{

		TTime now;

		now.HomeTime();

		TTimeIntervalMicroSeconds iv=now.MicroSecondsFrom(begin);

		if (iv.Int64()>=TInt64(aMicroseconds))

			return;

		}

	}

TInt MutexThreadEntryPoint1(TAny*)

//

// Mutex test thread 1

//

	{	

	thread1Count=0;

	TBool running=ETrue;

	do

		{

		mutex.Wait();

		BusyWait(100000);

		if (arrayIndex<KMaxArraySize)

			{

			array[arrayIndex++]=EThread1ID;

			thread1Count++;

			}

		else

			running=EFalse;

		mutex.Signal();

		} while (running);

	return(KErrNone);

	}

TInt MutexThreadEntryPoint2(TAny*)

//

// Mutex test thread 2

//

	{

	thread2Count=0;

	TBool running=ETrue;

	do

		{

		mutex.Wait();

		BusyWait(200000);

		if (arrayIndex<KMaxArraySize)

			{

			array[arrayIndex++]=EThread2ID;

			thread2Count++;

			}

		else

			running=EFalse;

		mutex.Signal();

		} while (running);

	return(KErrNone);

	}

TInt CriticalSnThreadEntryPoint1(TAny*)

//

// Critical Section test thread 1

//

	{	

	thread1Count=0;

	TBool running=ETrue;

	do

		{

		criticalSn.Wait();

		User::After(100000);

		if (arrayIndex<KMaxArraySize)

			{

			array[arrayIndex++]=EThread1ID;

			thread1Count++;

			}

		else

			running=EFalse;

		criticalSn.Signal();

		} while (running);

	return(KErrNone);

	}

TInt CriticalSnThreadEntryPoint2(TAny*)

//

// Critical Section test thread 2

//

	{

	thread2Count=0;

	TBool running=ETrue;

	do

		{

		criticalSn.Wait();

		User::After(200000);

		if (arrayIndex<KMaxArraySize)

			{

			array[arrayIndex++]=EThread2ID;

			thread2Count++;

			}

		else

			running=EFalse;

		criticalSn.Signal();

		} while (running);

	return(KErrNone);

	}

struct SWaitSem

	{

	RSemaphore iSem;

	TInt iTimeout;

	};

TInt WaitSemThread(TAny* a)

	{

	SWaitSem& ws = *(SWaitSem*)a;

	return ws.iSem.Wait(ws.iTimeout);

	}

void StartWaitSemThread(RThread& aT, SWaitSem& aW, TThreadPriority aP=EPriorityLess)

	{

	TInt r = aT.Create(KNullDesC, &WaitSemThread, 0x1000, 0x1000, 0x1000, &aW);

	aT.SetPriority(aP);

	aT.Resume();

	}

void WaitForWaitSemThread(RThread& aT, TInt aResult)

	{

	TRequestStatus s;

	aT.Logon(s);

	User::WaitForRequest(s);

	CLOSE_AND_WAIT(aT);

	}

TInt DummyThread(TAny*)

	{

	return 0;

	}

void TestSemaphore2()

	{

	test.Start(_L("Test semaphore wait with timeout"));

	SWaitSem ws;

	RThread t;

	TTime initial;

	TTime final;

	TInt elapsed=0;

	TInt r = ws.iSem.CreateLocal(0);

	RThread().SetPriority(EPriorityAbsoluteVeryLow);

	TInt threadcount=0;

	initial.HomeTime();

	while (elapsed<1000000)

		{

		r = t.Create(KNullDesC, &DummyThread, 0x1000, NULL, NULL);

		t.SetPriority(EPriorityMore);

		t.Resume();

		t.Close();

		++threadcount;

		final.HomeTime();

		elapsed = I64INT(final.Int64()-initial.Int64());

		}

	RThread().SetPriority(EPriorityNormal);

	test.Printf(_L("%d threads in 1 sec\n"),threadcount);

	TInt overhead = 1000000/threadcount;

	test.Printf(_L("overhead = %dus\n"),overhead);

	ws.iTimeout=1000000;

	initial.HomeTime();

	StartWaitSemThread(t, ws);

	WaitForWaitSemThread(t, KErrTimedOut);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	test(elapsed>=900000+overhead && elapsed<1500000+overhead);

	ws.iTimeout=-1;

	initial.HomeTime();

	StartWaitSemThread(t, ws);

	WaitForWaitSemThread(t, KErrArgument);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	ws.iTimeout=2000000;

	initial.HomeTime();

	StartWaitSemThread(t, ws);

	User::After(1000000);

	ws.iSem.Signal();

	WaitForWaitSemThread(t, KErrNone);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	test(elapsed>=900000+overhead && elapsed<1500000+overhead);

	ws.iTimeout=100000;

	StartWaitSemThread(t, ws, EPriorityMore);

	t.Suspend();

	ws.iSem.Signal();

	User::After(200000);

	t.Resume();

	WaitForWaitSemThread(t, KErrTimedOut);

	ws.iTimeout=100000;

	StartWaitSemThread(t, ws, EPriorityMore);

	t.Suspend();

	ws.iSem.Signal();

	User::After(50000);

	t.Resume();

	WaitForWaitSemThread(t, KErrNone);

	RThread t2;

	ws.iTimeout=100000;

	StartWaitSemThread(t, ws, EPriorityMuchMore);

	StartWaitSemThread(t2, ws, EPriorityMore);

	t.Suspend();

	ws.iSem.Signal();

	t.Resume();

	WaitForWaitSemThread(t, KErrTimedOut);

	WaitForWaitSemThread(t2, KErrNone);

	ws.iTimeout=1000000;

	initial.HomeTime();

	StartWaitSemThread(t2, ws, EPriorityMore);

	StartWaitSemThread(t, ws, EPriorityMuchMore);

	ws.iSem.Signal();

	WaitForWaitSemThread(t, KErrNone);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	WaitForWaitSemThread(t2, KErrTimedOut);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	test(elapsed>=900000+2*overhead && elapsed<1500000+2*overhead);

	ws.iTimeout=1000000;

	initial.HomeTime();

	StartWaitSemThread(t2, ws, EPriorityMore);

	StartWaitSemThread(t, ws, EPriorityMuchMore);

	WaitForWaitSemThread(t, KErrTimedOut);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	WaitForWaitSemThread(t2, KErrTimedOut);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	test(elapsed>=900000+2*overhead && elapsed<1500000+2*overhead);

	ws.iTimeout=1000000;

	initial.HomeTime();

	StartWaitSemThread(t2, ws, EPriorityMore);

	StartWaitSemThread(t, ws, EPriorityMuchMore);

	t.Kill(299792458);

	WaitForWaitSemThread(t2, KErrTimedOut);

	WaitForWaitSemThread(t, 299792458);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	test(elapsed>=900000+2*overhead && elapsed<1500000+2*overhead);

	ws.iTimeout=1000000;

	initial.HomeTime();

	StartWaitSemThread(t, ws, EPriorityMore);

	StartWaitSemThread(t2, ws, EPriorityMuchMore);

	ws.iSem.Close();

	WaitForWaitSemThread(t2, KErrGeneral);

	WaitForWaitSemThread(t, KErrGeneral);

	final.HomeTime();

	elapsed = I64INT(final.Int64()-initial.Int64());

	test.Printf(_L("Time taken = %dus\n"), elapsed);

	test(elapsed<=50000+3*overhead);

	test.End();

	}

void TestSemaphore()

	{

/*********** TO DO ************/

// Check it panics if the count <0

	test.Start(_L("Create"));

	RSemaphore semaphore;

	RThread thread1, thread2;

	semaphore.CreateLocal(0); 	// creates a DPlatSemaphore but casts it to a pointer to a DSemaphore

								// sets semaphore count to the value of the parameter, 

								// adds object to the K::Semaphores container, sets iHandle

								// Local sets DSemaphore.iName to NULL & iOwner to Kern::CurrentProcess()

								// Global sets iName to that passed and iOwner to NULL

								// Adds a record into CObjectIx containing a pointer to the semaphore object

/*	test.Next(_L("Find"));

	fullName=semaphore.FullName();	

	find.Find(fullName);	// sets iMatch to fullName	(misleadingly named method as it doesn't find anything)

	test(find.Next(fullName)== KErrNone);	

*/

	test.Next(_L("Producer/Consumer scenario"));

	// Test Rsemaphore with the producer/consumer scenario	RThread thread1, thread2;

	TRequestStatus stat1, stat2;

	thread1.Logon(stat1);

	thread2.Logon(stat2);

	thread1.Resume(); 

	thread2.Resume();

	User::WaitForRequest(stat1);

	User::WaitForRequest(stat2);

	for(TInt jj=0;jj<KNumProducerItems;jj++)

	test.Next(_L("Close"));

	mutex.Close();

	CLOSE_AND_WAIT(thread1);

	CLOSE_AND_WAIT(thread2);

	test.End();

	}

void TestMutex2()

	{

	RMutex m;

	test.Start(_L("Create"));

	// Test RMutex::IsHeld()

	test.Next(_L("IsHeld ?"));

	test(!m.IsHeld());

	test.Next(_L("Wait"));

	m.Wait();

	test.Next(_L("IsHeld ?"));

	test(m.IsHeld());

	test.Next(_L("Signal"));

	m.Signal();

	test.Next(_L("IsHeld ?"));

	test(!m.IsHeld());

	test.End();

	}

void TestMutex()

	{

	test.Start(_L("Create"));

	test.Next(_L("Threads writing to arrays test"));

//

// Create two threads which write to two arrays. The arrays and indexs

// are global and each thread writes an identifier to the arrays. For

// one array the writing and updating of the index is wrapped in a mutex

// pair. The other array is a control and is not wrapaped within mutex.

// Each thread records the number of instances it "thinks" it wrote to

// each array. For the mutex controlled array the actual instances

// written to the array should always be the same as the threads think.

//

	arrayIndex=0;

	RThread thread1,thread2;	

	TRequestStatus stat1,stat2;

	thread1.Logon(stat1);

	thread2.Logon(stat2);

	thread1.Resume(); 

	thread2.Resume();

	User::WaitForRequest(stat1);

	User::WaitForRequest(stat2);

	TInt thread1ActualCount=0; 

	TInt thread2ActualCount=0;

	TInt ii=0;

	while(ii<KMaxArraySize)

		{

		if (array[ii]==EThread1ID)

			thread1ActualCount++;

		if (array[ii]==EThread2ID)

			thread2ActualCount++;

		ii++;

		}

	test.Printf(_L("T1 %d T1ACT %d T2 %d T2ACT %d"),thread1Count,thread1ActualCount,thread2Count,thread2ActualCount);

	test.Next(_L("Close"));

	CLOSE_AND_WAIT(thread1);

	CLOSE_AND_WAIT(thread2);

	mutex.Close();

	test.End();

	}

void TestCriticalSection()

//

//As TestMutex, but for RCriticalSection