e32base.h File Reference

Constructs and pushes a TCleanupItem object onto the cleanup stack.

The TCleanupItem encapsulates:

The cleanup operation is the private static function Delete() of the templated class CleanupDelete, and is called as a result of a subsequent call to CleanupStack::PopAndDestroy().

CleanupDelete::Delete() is passed a pointer to the class T object to be cleaned up, and the function implements cleanup by deleting the passed object.

An example of its use:

...
CTestOne* one = new (ELeave) CTestOne;
CleanupDeletePushL(one);
...
CleanupStack::PopAndDestroy(); // <--- results in "one" being deleted.
...

See also: TCleanupItem CleanupDelete CleanupStack::PopAndDestroy()

Constructs and pushes a TCleanupItem object onto the cleanup stack.

The TCleanupItem encapsulates:

The cleanup operation is the private static function ArrayDelete() of the templated class CleanupArrayDelete, and is called as a result of a subsequent call to CleanupStack::PopAndDestroy().

CleanupArrayDelete::ArrayDelete() is passed a pointer to the array of class T objects to be cleaned up, and the function implements cleanup by deleting the passed array using the delete [] operator.

An example of its use:

...
RTestOne* one = new (ELeave) RTestOne [KSomeArraySize];
CleanupArrayDeletePushL(one);
... // Do something with the object.........
CleanupStack::PopAndDestroy(); // <--- results in the array "one" being deleted.
...

See also: TCleanupItem CleanupArrayDelete CleanupStack::PopAndDestroy()

Constructs and pushes a TCleanupItem object onto the cleanup stack.

The TCleanupItem encapsulates:

1. a reference aRef to the object of type class T which is to be cleaned up

2. an associated cleanup operation.

The cleanup operation is the private static function Close() of the templated class CleanupClose and is invoked as a result of a subsequent call to CleanupStack::PopAndDestroy().

CleanupClose::Close() is passed a pointer to the class T object to be cleaned up, and the function implements cleanup by calling Close() on the passed object. The class T object must, therefore, define and implement (or inherit) a Close() member function.

An example of its use:

class RTestTwo;
	{
public :
    ...
	IMPORT_C void Close();
	...
	}
...
RTestTwo two;
CleanupClosePushL(two);
...
CleanupStack::PopAndDestroy(); // <--- results in Close() being called on "two".
......

In practice, this type of cleanup operation is commonly applied to handles to resources; if such handles are constructed on the program stack, then it is important that such handles are closed.

See also: TCleanupItem CleanupClose CleanupStack::PopAndDestroy()

Constructs and pushes a TCleanupItem object onto the cleanup stack.

The TCleanupItem encapsulates:

1. a reference aRef to the object of type class T which is to be cleaned up

2. an associated cleanup operation.

The cleanup operation is the private static function Release() of the templated class CleanupRelease and is invoked as a result of a subsequent call to CleanupStack::PopAndDestroy().

CleanupRelease::Release() is passed a pointer to the class T object to be cleaned up, and the function implements cleanup by calling Release() on the passed object. The class T object must, therefore, define and implement (or inherit) a Release() member function.

An example of its use:

class RTestThree;
	{
public :
    ...
	IMPORT_C void Release();
	...
	}
...
RTestThree three;
CleanupReleasePushL(three);
...
CleanupStack::PopAndDestroy(); // <--- results in Release() being called on "three".
......

See also: TCleanupItem CleanupRelease CleanupStack::PopAndDestroy()