--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/kerneltest/e32test/nkernsa/tiedevents.cpp Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,235 @@
+// Copyright (c) 2007-2009 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\nkernsa\tiedevents.cpp
+//
+//
+
+#include <nktest/nkutils.h>
+
+//---------------------------------------------------------------------------------------------------------------------
+//! @SYMTestCaseID KBASE-tiedevents-2448
+//! @SYMTestType UT
+//! @SYMTestCaseDesc Verifying tied events
+//! @SYMPREQ PREQ2094
+//! @SYMTestPriority High
+//! @SYMTestActions
+//! 1. TiedEventTest: run a reader thread (or several in a group) accessing a
+//! common data block. A timer, IDFC, or interrupt handler writes to the
+//! data block concurrently - first incrementing all data from 0 to 1 then
+//! decrementing it again.
+//!
+//! @SYMTestExpectedResults
+//! 1. When the timer/IDFC/interrupt is tied to the thread/group, then the
+//! execution of the event should prevent the thread/group from running on
+//! any processor, and thus readers should never be able to observe the
+//! data being 1. When the event is not tied, the reader should observe
+//! the data as being 1 at least some of the time.
+//---------------------------------------------------------------------------------------------------------------------
+
+#ifdef __SMP__
+
+extern "C" void HijackSystemTimer(NSchedulable* aTieTo);
+
+const TInt FlagCount = 2048;
+const TInt LoopCount = 100;
+
+volatile TUint32 Flags[FlagCount];
+volatile TBool Done;
+volatile TUint32 FlagsSet;
+NTimer* Timer;
+TDfc* IDfc;
+NThreadGroup TG;
+NFastSemaphore* DoneSem;
+
+enum TTiedMode
+ {
+ ETimer,
+ EInterrupt,
+ EIDFC
+ };
+
+// Used directly as the IDFC, also called by the timer function
+void FiddleFlags(TAny*)
+ {
+ TInt i;
+ for (i=0; i<FlagCount; ++i)
+ __e32_atomic_add_ord32(&Flags[i], 1);
+ for (i=0; i<FlagCount; ++i)
+ __e32_atomic_add_ord32(&Flags[i], (TUint32)-1);
+ }
+
+// Used for timer/interrupt cases as the timer function
+void TimerFn(TAny*)
+ {
+ FiddleFlags(NULL);
+ if (!__e32_atomic_load_acq32(&Done))
+ Timer->OneShot(10);
+ }
+
+// Used for IDFC case as the timer function
+void IDfcQFn(TAny*)
+ {
+ IDfc->Add();
+ if (!__e32_atomic_load_acq32(&Done))
+ Timer->OneShot(10);
+ }
+
+// Test thread, just looks for flags being set
+void TiedEventThread(TAny*)
+ {
+ TInt cpu, i, j;
+ TUint32 set=0;
+
+ for_each_cpu(cpu)
+ {
+ NKern::ThreadSetCpuAffinity(NKern::CurrentThread(), cpu);
+
+ for (i=0; i<LoopCount; ++i)
+ {
+ for (j=0; j<FlagCount; ++j)
+ if (__e32_atomic_load_acq32(&Flags[j]))
+ ++set;
+ }
+ }
+
+ __e32_atomic_add_ord32(&FlagsSet, set);
+
+ NKern::FSSignal(DoneSem);
+ NKern::WaitForAnyRequest();
+ }
+
+void TiedEventTest(TBool aTied, TInt aThreads, TTiedMode aMode)
+ {
+ TEST_PRINT3("TiedEventTest aTied=%d aThreads=%d aMode=%d", aTied, aThreads, aMode);
+
+ // Set up shared parameters
+ memclr((void*)&Flags,sizeof(Flags));
+ Done = EFalse;
+ FlagsSet = 0;
+
+ // Create test threads to check data
+ NFastSemaphore exitSem(0);
+ NFastSemaphore doneSem(0);
+ DoneSem = &doneSem;
+ char name[5]={0x54, 0x45, 0x54, 0x31, 0};
+ TInt i;
+ NSchedulable* tieTo = NULL;
+ NThread* t[16];
+ NThreadGroup* group = NULL;
+ if (aThreads == 1)
+ {
+ t[0] = CreateUnresumedThreadSignalOnExit(name, TiedEventThread, 10, NULL, 0, KSmallTimeslice, &exitSem, KCpuAffinityAny);
+ if (aTied)
+ tieTo = t[0];
+ }
+ else
+ {
+ group = &TG;
+ if (aTied)
+ tieTo = group;
+ SNThreadGroupCreateInfo ginfo;
+ ginfo.iCpuAffinity = KCpuAffinityAny;
+ TInt r = NKern::GroupCreate(group, ginfo);
+ TEST_RESULT(r==KErrNone, "Failed creating group");
+ for (i=0; i<aThreads; ++i)
+ {
+ t[i] = CreateUnresumedThreadSignalOnExit(name, TiedEventThread, 10, NULL, 0, KSmallTimeslice, &exitSem, KCpuAffinityAny, group);
+ ++name[3];
+ }
+ }
+
+#ifndef __X86__
+ // Tie the system timer interrupt to the thread if we're testing interrupts
+ // This means the timer function should always be exclusive with the theads
+ // even though it's not tied itself.
+ if (aMode == EInterrupt && tieTo)
+ HijackSystemTimer(tieTo);
+#endif
+
+ // Create the IDFC
+ NSchedulable* tieDFC = aMode == EIDFC ? tieTo : NULL;
+ TDfc idfc(tieDFC, FiddleFlags, NULL);
+ IDfc = &idfc;
+
+ // Create and start NTimer
+ // If we're testing timers it will be tied itself
+ // If we're testing interrupts it will not be tied itself but will still run
+ // exclusively because the interrupt is tied
+ // If we're testing IDFCs it's just used to repeatedly queue the IDFC and
+ // where the timer itself runs is irrelevant.
+ NSchedulable* tieTimer = aMode == ETimer ? tieTo : NULL;
+ NTimerFn timerfn = aMode == EIDFC ? IDfcQFn : TimerFn;
+ NTimer timer(tieTimer, timerfn, NULL);
+ Timer = &timer;
+ timer.OneShot(10);
+
+ // Resume threads
+ for (i=0; i<aThreads; ++i)
+ NKern::ThreadResume(t[i]);
+
+ // Wait for threads to be done
+ for (i=0; i<aThreads; ++i)
+ NKern::FSWait(&doneSem);
+
+ // Tell timer to stop requeueing itself
+ __e32_atomic_store_rel32(&Done, ETrue);
+ NKern::Sleep(100);
+
+#ifndef __X86__
+ // Restart the normal system timer if we're testing interrupts
+ // as otherwise it will get unbound when the thing it's tied to
+ // dies.
+ if (aMode == EInterrupt && tieTo)
+ HijackSystemTimer(NULL);
+#endif
+
+ // Clean up threads/group
+ for (i=0; i<aThreads; ++i)
+ {
+ NKern::ThreadRequestSignal(t[i]);
+ NKern::FSWait(&exitSem);
+ }
+ if (group)
+ NKern::GroupDestroy(group);
+
+ // Check that the flag was ok
+ TEST_PRINT1("Flag was set %d times", FlagsSet);
+ if (aTied)
+ TEST_RESULT(FlagsSet == 0, "Flag was set, shouldn't be");
+ else
+ TEST_RESULT(FlagsSet > 0, "Flag wasn't set, test broken?");
+ }
+#endif
+
+void TestTiedEvents()
+ {
+#ifdef __SMP__
+ TiedEventTest(EFalse, 1, ETimer);
+ TiedEventTest(ETrue, 1, ETimer);
+ TiedEventTest(EFalse, 2, ETimer);
+ TiedEventTest(ETrue, 2, ETimer);
+
+#ifndef __X86__
+ TiedEventTest(EFalse, 1, EInterrupt);
+ TiedEventTest(ETrue, 1, EInterrupt);
+ TiedEventTest(EFalse, 2, EInterrupt);
+ TiedEventTest(ETrue, 2, EInterrupt);
+#endif
+
+ TiedEventTest(EFalse, 1, EIDFC);
+ TiedEventTest(ETrue, 1, EIDFC);
+ TiedEventTest(EFalse, 2, EIDFC);
+ TiedEventTest(ETrue, 2, EIDFC);
+#endif
+ }