sysresmonitoring/oommonitor/src/oomoutofmemorywatcher.cpp
changeset 35 13fd6fd25fe7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysresmonitoring/oommonitor/src/oomoutofmemorywatcher.cpp	Thu May 27 13:01:09 2010 +0300
@@ -0,0 +1,152 @@
+/*
+* Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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:  Main classes for Out of Memory Monitor.
+*
+*/
+
+
+
+#include "oomoutofmemorywatcher.h"
+#include "oommemorymonitor.h"
+#include "OomTraces.h"
+#include <u32hal.h>
+
+// ======================================================================
+// class COutOfMemoryWatcher
+// - notifies when free memory crosses preset thresholds
+// ======================================================================
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+COutOfMemoryWatcher* COutOfMemoryWatcher::NewL(CMemoryMonitor& aMonitor, TInt aLowRamThreshold, TInt aGoodRamThreshold, TBool aSwapUsageMonitored, TInt aLowSwapThreshold, TInt aGoodSwapThreshold)
+    {
+    FUNC_LOG;
+
+    COutOfMemoryWatcher* self = new (ELeave) COutOfMemoryWatcher(aMonitor, aSwapUsageMonitored);
+    CleanupStack::PushL(self);
+    self->ConstructL(aLowRamThreshold, aGoodRamThreshold, aLowSwapThreshold, aGoodSwapThreshold);
+    CleanupStack::Pop(self);
+    return self;
+    }
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+COutOfMemoryWatcher::~COutOfMemoryWatcher()
+    {
+    FUNC_LOG;
+
+    Cancel();
+    }
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+COutOfMemoryWatcher::COutOfMemoryWatcher(CMemoryMonitor& aMonitor, TBool aSwapUsageMonitored)
+:   CActive(CActive::EPriorityStandard),
+    iMemoryMonitor(aMonitor),
+    iSwapUsageMonitored(aSwapUsageMonitored)
+    {
+    FUNC_LOG;
+
+    CActiveScheduler::Add(this);
+    }
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+void COutOfMemoryWatcher::ConstructL(TInt aLowRamThreshold, TInt aGoodRamThreshold, TInt aLowSwapThreshold, TInt aGoodSwapThreshold)
+    {
+    FUNC_LOG;
+
+    UserSvr::SetMemoryThresholds(aLowRamThreshold,aGoodRamThreshold);
+    if (iSwapUsageMonitored)
+        {
+        SVMSwapThresholds thresholds;
+        thresholds.iLowThreshold = aLowSwapThreshold;
+        thresholds.iGoodThreshold = aGoodSwapThreshold;
+        UserSvr::HalFunction(EHalGroupVM, EVMHalSetSwapThresholds, &thresholds, 0);
+        }
+    User::LeaveIfError(iChangeNotifier.Create());
+    }
+
+void COutOfMemoryWatcher::UpdateThresholds(TInt aLowRamThreshold, TInt aGoodRamThreshold, TInt aLowSwapThreshold, TInt aGoodSwapThreshold)
+    {
+    FUNC_LOG;
+
+    UserSvr::SetMemoryThresholds(aLowRamThreshold,aGoodRamThreshold);
+    if (iSwapUsageMonitored)
+        {
+        SVMSwapThresholds thresholds;
+        thresholds.iLowThreshold = aLowSwapThreshold;
+        thresholds.iGoodThreshold = aGoodSwapThreshold;
+        UserSvr::HalFunction(EHalGroupVM, EVMHalSetSwapThresholds, &thresholds, 0);
+        }
+    }
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+void COutOfMemoryWatcher::Start()
+    {
+    FUNC_LOG;
+
+    if (!IsActive())
+        {
+        iChangeNotifier.Logon(iStatus);
+        SetActive();
+        }
+    }
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+void COutOfMemoryWatcher::DoCancel()
+    {
+    FUNC_LOG;
+
+    iChangeNotifier.LogonCancel();
+    }
+
+// ---------------------------------------------------------
+//
+// ---------------------------------------------------------
+//
+void COutOfMemoryWatcher::RunL()
+    {
+    FUNC_LOG;
+
+    TInt status = iStatus.Int();
+
+    if (status < 0)
+        {
+        User::Leave(status);
+        }
+
+    // Check for memory status change.
+    if (status & EChangesFreeMemory)
+        {
+        iMemoryMonitor.FreeMemThresholdCrossedL();
+        }
+
+    // We are not active until FreeMemThresholdCrossedL returns.
+    Start();
+    }