resourcemanager: Power Resource Manager Framework example

Purpose

The example shows how to use the Power Resource Manager user side APIs provided by the RBusDevResManUs class.

The use cases demonstrated are:

• How to get information about power resources.

• How to get information about other clients registered with the Power Resource Manager.

• How to change the state of a resource.

• How to get notification when a resource changes state.

Class summary

1. RBusDevResManUs

2. TResourceInfo

3. TClientInfo

Download

Click on the following link to download the example: resourcemanager.zip.

Click: browse to view the example code.

Design and implementation

This example builds a console application called resourcemanager.exe. It requests user input, and prints information to the console.

The following menu options are presented to the user:

• Get Power Resource information.

• Change the state of a resource.

• Notify a change of resource state.

Get Power Resource information

This option gets and displays information about the clients of the Power Resource Manager framework and about the available resources.

The following sub-menu options are presented:

• 1. Get the number of available resources.

• 2. Get information about a particular resource.

• 3. Get information about all the available resources.

• 4. Get the state of a particular resource.

• 5. Get the number of clients using a particular resource.

• 6. Get the number of resources used by a particular client.

• 7. Get information about all the resources in use by a particular client.

• 8. Get information on all clients using a particular resource.

• 9. Get the names of all clients.

Change the state of a resource

This option allows the user to change the state of a resource.

Notify any change of resource state

This option changes the state of a resource and notifies the user about the change.

Building and configuring

To build the example:

• You can build the example from your IDE or the command line.

  If you use an IDE, import the bld.inf file of the example into your IDE, and use the build command of the IDE.

  If you use the command line, open a command prompt, and set the current directory to the source code directory of the example. You can then build the example with the SBSv1 build tools with the following commands:

  bldmake bldfiles

  abld build

• For the emulator, the example builds an executable called resourcemanager.exe in the epoc32\release\winscw\<udeb or urel>\ folder.

Running the example

To run the example, launch the executable resourcemanager.exe, then choose from the menu options. Press Esc to quit.

Note: this example requires an LDD, a PDD and a PSL (platform specific layer). If these are not provided on the platform you are using, the example will not run.