Class CActiveCommsMobilityApiExt

class CActiveCommsMobilityApiExt : public CActive;

Description

Comms Mobility API extension for client running an Active Scheduler.. Whenever an Active Scheduler is present, this API is recommended over RCommsMobilityApiExt because of its simplicity.

With few important exceptions, CActiveCommsMobilityApiExt exports very similar APIs to RCommsMobilityApiExt

Derivation

• CBase - Base class for all classes to be instantiated on the heap.

• CActive - The core class of the active object abstraction.

• CActiveCommsMobilityApiExt - Comms Mobility API extension for client running an Active Scheduler.. Whenever a...

Members

Defined in CActiveCommsMobilityApiExt:

• DoCancel()Implements cancellation of an outstanding request.
• RunError(TInt)
• RunL()Handles an active object's request completion event.

Inherited from CActive:

• CActive(TInt)Constructs the active object with the specified priority.
• Cancel()Cancels the wait for completion of an outstanding request.
• Deque()Removes the active object from the active scheduler's list of active objects.
• EPriorityHighA priority higher than EPriorityUserInput.
• EPriorityIdleA low priority, useful for active objects representing background processing.
• EPriorityLowA priority higher than EPriorityIdle but lower than EPriorityStandard.
• EPriorityStandardMost active objects will have this priority.
• EPriorityUserInputA priority higher than EPriorityStandard; useful for active objects handling use...
• Extension_(TUint,TAny *&,TAny *)Extension function
• IsActive()constDetermines whether the active object has a request outstanding.
• IsAdded()constDetermines whether the active object has been added to the active scheduler's li...
• Priority()constGets the priority of the active object.
• SetActive()Indicates that the active object has issued a request and that it is now outstan...
• SetPriority(TInt)Sets the priority of the active object.
• TPriorityDefines standard priorities for active objects.
• iStatusThe request status associated with an asynchronous request.

Inherited from CBase:

• Delete(CBase *)Deletes the specified object.
• operator new(TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TAny *)Initialises the object to binary zeroes.
• operator new(TUint,TLeave)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TLeave,TUint)Allocates the object from the heap and then initialises its contents to binary z...
• operator new(TUint,TUint)Allocates the object from the heap and then initialises its contents to binary z...

private: virtual void DoCancel();

Description

Implements cancellation of an outstanding request.

This function is called as part of the active object's CActive::Cancel().

It must call the appropriate cancel function offered by the active object's asynchronous service provider. The asynchronous service provider's cancel is expected to act immediately.

CActiveCommsMobilityApiExt::DoCancel() must not wait for event completion; this is handled by CActive::Cancel().

See also:

• CActive::Cancel()Cancels the wait for completion of an outstanding request.

private: virtual void RunL();

Description

Handles an active object's request completion event.

A derived class must provide an implementation to handle the completed request. If appropriate, it may issue another request.

The function is called by the active scheduler when a request completion event occurs, i.e. after the active scheduler's WaitForAnyRequest() function completes.

Before calling this active object's CActiveCommsMobilityApiExt::RunL() function, the active scheduler has:

1. decided that this is the highest priority active object with a completed request

2. marked this active object's request as complete (i.e. the request is no longer outstanding)

CActiveCommsMobilityApiExt::RunL() runs under a trap harness in the active scheduler. If it leaves, then the active scheduler calls CActiveCommsMobilityApiExt::RunError(TInt) to handle the leave.

Note that once the active scheduler's Start() function has been called, all user code is run under one of the program's active object's CActiveCommsMobilityApiExt::RunL() or CActiveCommsMobilityApiExt::RunError(TInt) functions.

See also:

• CActiveScheduler::Start()Starts a new wait loop under the control of the current active scheduler.
• CActiveScheduler::Error(TInt)constHandles the result of a leave occurring in an active object’s RunL() function.
• CActiveScheduler::WaitForAnyRequest()Wait for an asynchronous request to complete.

private: virtual TInt RunError(TInt aError);

Description

Parameters

TInt aError

Return value

TInt