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<concept id="GUID-7D4F429E-FC65-55FC-BD4D-8F351E78AF33" xml:lang="en"><title>Architecture</title><shortdesc>This topic describes the architecture of the domain manager.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>A domain provides a way to group programs by their power requirements and

dependencies. The domain manager is a system server that handles the registration

of applications with domains, manages domain-specific power state transitions

and system-wide power state transitions. </p>

<fig id="GUID-303BF4E4-B4D6-599A-A6EE-5C2B8EFF5D3C">

<image href="GUID-F1E8B6F9-AAEA-5A55-B838-36C74FC8B4BA_d0e363332_href.png" placement="inline"/>

</fig>

<ul>

<li id="GUID-8679AD4F-9576-5D20-BA1E-2C051795D3AB"><p>Applications interface

with the domain manager through the <xref href="GUID-26767FE7-3AF2-3E21-9965-915855B7AB55.dita"><apiname>RDmDomain</apiname></xref> class. </p> </li>

<li id="GUID-2B5F11C7-303E-5918-A81D-4EA4E91F998C"><p>Domain management policy

has control over the domain manager and takes decisions about system-wide

and domain-wide power-state transitions. Typically, the code that implements

domain management policy will form part of, or at least be accessible to,

the UI framework. The interface with the domain manager is <xref href="GUID-C1C17273-1C4A-35D5-A564-F7FC81EDFB7B.dita"><apiname>RDmDomainManager</apiname></xref>. </p> </li>

<li id="GUID-183A5AC1-447F-595C-96D2-944A7C45ABA2"><p>The domains and their

characteristics for a phone are defined in a domain management policy DLL

that implements the <xref href="GUID-15CAA28D-943B-3B92-B4E1-8AA466DFA407.dita"><apiname>DmPolicy</apiname></xref> interface. This DLL is device-specific. </p> </li>

<li id="GUID-13B5DEE3-221A-5A67-8EAD-131CB36A85C0"><p>The domain manager interfaces

with the kernel-side power manager through the <xref href="GUID-15D25C07-CFD2-32CE-AD22-E17D512D8E87.dita"><apiname>Power</apiname></xref> class. </p> </li>

</ul>

</conbody></concept>