#include <e32base.h>
| class CAsyncCallBack : public CAsyncOneShot |
| Protected Attributes | |
|---|---|
| TCallBack | iCallBack |
| Public Member Functions | |
|---|---|
| CAsyncCallBack(TInt) | |
| CAsyncCallBack(const TCallBack &, TInt) | |
| virtual | ~CAsyncCallBack() |
| IMPORT_C void | CallBack() |
| IMPORT_C void | Set(const TCallBack &) |
| Protected Member Functions | |
|---|---|
| virtual void | RunL() |
| Inherited Attributes | |
|---|---|
| CActive::iStatus | |
| Inherited Enumerations | |
|---|---|
| CActive:TPriority | |
An active object that performs its processing through an associated call back function, and which is only performed once.
| TCallBack | iCallBack | [protected] |
The callback object that encapsulates the callback function.
| IMPORT_C | CAsyncCallBack | ( | TInt | aPriority | ) |
Constructor taking a priority value.
Specifically, the constructor sets this active object's priority value through a call to the base class constructor in its ctor list.
No call back is set, which means that it must be set subsequently through a call to the Set() function.
See also: CAsyncCallBack::Set
| Parameter | Description |
|---|---|
| aPriority | The active object priority value. CActive::TPriority defines a standard set of priorities. |
Constructor taking a priority value and a callback.
Specifically, the constructor:
1. sets this active object's priority value through a call to the base class constructor in its ctor list
2. sets the callback; the function encapsulated by the callback is called when this active object is scheduled to run.
| Parameter | Description |
|---|---|
| aCallBack | A reference to a callback object encapsulating a function which is called when this active object is ready to run. The constructor takes a copy of this callback object, which means that it can be safely discarded after construction. |
| aPriority | The active object priority value. |
| IMPORT_C void | CallBack | ( | ) |
Queues this active object to be run, if it is not already queued.
| void | RunL | ( | ) | [protected, virtual] |
Reimplemented from CActive::RunL()
Calls the callback function.
See also: TCallBack::CallBack
| IMPORT_C void | Set | ( | const TCallBack & | aCallBack | ) |
Sets the call back.
| Parameter | Description |
|---|---|
| aCallBack | A reference to a callback object encapsulating a function which is called when this active object is ready to run. |