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<!DOCTYPE task

  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

<task id="GUID-50CA5439-29A1-426C-83BA-EC048FE86CDE" xml:lang="en"><title>Allowing

Large Memory Allocation</title><shortdesc>This section describes how an application can request for free

memory from OOM Monitor for large amount of RAM allocation.</shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context id="GUID-54D945B5-EFE2-4639-B040-7A6321448A07">       <p>An application

can allocate RAM without seeking the permission from the OOM Monitor if the

amount of RAM is not over <xref href="GUID-75DB7CA6-08F0-3CFB-ADDF-621FFF5B8058.dita"><apiname>KOomMaxAllocationWithoutPermission</apiname></xref> limit.

 </p><p>If an application needs to allocate more RAM than allocated by <xref href="GUID-75DB7CA6-08F0-3CFB-ADDF-621FFF5B8058.dita"><apiname>KOomMaxAllocationWithoutPermission</apiname></xref>,

it must request the OOM Monitor using the <xref href="GUID-02D1911A-D2E5-3D28-9B05-75DA0A75DE73.dita#GUID-02D1911A-D2E5-3D28-9B05-75DA0A75DE73/GUID-BE322080-5193-3D8E-9425-C6BEA920ED2E"><apiname>ROomMonitorSession::RequestFreeMemory()</apiname></xref> method. </p><p>An

application can request for free RAM either synchronously or asynchronously.</p> 

 </context>

<steps id="GUID-4DD07DEC-6017-4237-BE46-1D69E5FBD744-GENID-1-10-1-10-1-1-8-1-5-1-6-1-6-1-3-2">

<step id="GUID-83631E4F-71D0-4FD2-8FD6-46689AAFA761-GENID-1-10-1-10-1-1-8-1-5-1-6-1-6-1-3-2-1"><cmd>Create an OOM Monitor

session</cmd>

<info><codeblock xml:space="preserve">ROomMonitorSession ioomMonitorSession;

CleanUpClosePushL(ioomMonitorSession);

User::LeaveIfError(ioomMonitorSession.Connect());

</codeblock></info>

</step>

<step id="GUID-83631E4F-71D0-4FD2-8FD6-46689AAFA761-GENID-1-10-1-10-1-1-8-1-5-1-6-1-6-1-3-2-2"><cmd>Request for free

memory can be done in two ways:</cmd>

</step>

</steps>

<result id="GUID-1D804A3D-8EEC-4E62-8496-2A43CCDC0BEB"><p>The OOM Monitor

allows the client application to allocate memory, if the free RAM level is

above the <codeph>LOW_RAM_THRESHOLD</codeph> value.</p><p> If the free RAM

level is below the <codeph>LOW_RAM_THRESHOLD</codeph> value,

the OOM Monitor releases RAM using <xref href="GUID-02D1911A-D2E5-3D28-9B05-75DA0A75DE73.dita#GUID-02D1911A-D2E5-3D28-9B05-75DA0A75DE73/GUID-BE322080-5193-3D8E-9425-C6BEA920ED2E"><apiname>ROomMonitorSession::RequestFreeMemory()</apiname></xref> method.

This method returns the following values: <ul>

<li><p>Requested amount of RAM is available then <codeph>aStatus</codeph> is

set to <codeph>KErrNone</codeph>.</p></li>

<li><p>Requested amount of RAM is not available then <codeph>aStatus</codeph> is

set to <codeph>KErrNoMemory</codeph>.</p></li>

</ul> </p></result>

</taskbody><related-links>

<link href="GUID-F6A33835-D677-41D0-86BB-812E3AFA5192.dita"><linktext>OOM Monitor

Concepts</linktext></link>

<link href="GUID-39A8FBC9-5FD6-4F92-B71E-5C5438ECFD46.dita"><linktext>OOM Monitor

Overview</linktext></link>

<link href="GUID-88752800-83BD-4845-80A0-6B65D8D81924.dita"><linktext>OOM Monitor

Reference</linktext></link>