1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

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

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // e32test\thread\smpsafe.cpp

    15 // 

    16 //

    17 

    18 #include <e32std.h>

    19 #include <e32std_private.h>

    20 #include <e32atomics.h>

    21 

    22 IMPORT_C void DoNothingA();

    23 IMPORT_C void DoNothingB();

    24 IMPORT_C void DoNothingC();

    25 IMPORT_C void DoNothingD();

    26 IMPORT_C void DoNothingE();

    27 

    28 #ifdef MAKE_DLL

    29 

    30 #ifdef PROVIDE_A

    31 EXPORT_C void DoNothingA() {}

    32 #endif

    33 

    34 #ifdef PROVIDE_B

    35 EXPORT_C void DoNothingB() { DoNothingA(); }

    36 #endif

    37 

    38 #ifdef PROVIDE_C

    39 EXPORT_C void DoNothingC() { DoNothingD(); DoNothingE(); }

    40 #endif

    41 

    42 #ifdef PROVIDE_D

    43 EXPORT_C void DoNothingD() { DoNothingC(); }

    44 #endif

    45 

    46 #ifdef PROVIDE_E

    47 EXPORT_C void DoNothingE() { DoNothingC(); }

    48 #endif

    49 

    50 #else // !MAKE_DLL

    51 

    52 TInt Affinity;

    53 

    54 TInt AffinitySlave(TAny*)

    55 	{

    56 	for (;;)

    57 		{

    58 		__e32_atomic_store_rel32(&Affinity, 0); // we can't be locked if this runs

    59 		User::AfterHighRes(1);

    60 		}

    61 	}

    62 

    63 TInt CheckAffinity()

    64 	{

    65 	__e32_atomic_store_rel32(&Affinity, 1); // assume we are locked to a single cpu

    66 

    67 	RThread t;

    68 	TInt r = t.Create(_L("AffinitySlave"), AffinitySlave, KDefaultStackSize, NULL, NULL);

    69 	if (r != KErrNone)

    70 		return r;

    71 

    72 	TRequestStatus s;

    73 	t.Logon(s);

    74 	t.SetPriority(EPriorityLess);

    75 	t.Resume();

    76 

    77 	TUint32 target = User::NTickCount() + 10;

    78 	while (User::NTickCount() < target) {}

    79 

    80 	r = __e32_atomic_load_acq32(&Affinity);

    81 

    82 	t.Kill(0);

    83 	User::WaitForRequest(s);

    84 	t.Close();

    85 

    86 	return r;

    87 	}

    88 

    89 #ifndef OMIT_MAIN

    90 GLDEF_C TInt E32Main()

    91 	{

    92 #ifdef USE_A

    93 	DoNothingA();

    94 #endif

    95 #ifdef USE_B

    96 	DoNothingB();

    97 #endif

    98 	return CheckAffinity();

    99 	}

   100 #endif // OMIT_MAIN

   101 

   102 #endif