Interface Technology Basics VST 3.6.11 SDK for developing VST Plug-in

- Main Page
- Related Pages
- Modules
- Namespaces
- Classes
- Files

- Class List
- Class Index
- Class Hierarchy
- Class Members

All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Public Member Functions | List of all members
OPtr< I > Class Template Reference
Basic Interfaces

OPtr - "owning" smart pointer used for newly created FObjects. More...

`#include <smartpointer.h>`

Inheritance diagram for OPtr< I >:

## Public Member Functions
| OPtr (I *p)
| OPtr (const IPtr< I > &p)
| OPtr (const OPtr< I > &p)
| OPtr ()
I * | operator= (I *_ptr)
Public Member Functions inherited from IPtr< I >
| IPtr (I *ptr, bool addRef=true)
| IPtr (const IPtr &)
| IPtr (const IPtr< I > &other)
| IPtr ()
| ~IPtr ()
I * | operator= (I *ptr)
IPtr & | operator= (const IPtr &other)
IPtr & | operator= (const IPtr< I > &other)
| operator I * () const
I * | operator-> () const
I * | get () const

## Additional Inherited Members
Protected Attributes inherited from IPtr< I >
I * | ptr

## Detailed Description

### template<class I>
class Steinberg::OPtr< I >

OPtr - "owning" smart pointer used for newly created FObjects.

FUnknown implementations are supposed to have a refCount of 1 right after creation. So using an IPtr on newly created objects would lead to a leak. Instead the OPtr can be used in this case.
Example:

OPtr<IPath> path = FHostCreate (IPath, hostClasses);
// no release is needed...

The assignment operator takes ownership of a new object and releases the old. So its safe to write:

OPtr<IPath> path = FHostCreate (IPath, hostClasses);
path = FHostCreate (IPath, hostClasses);
path = 0;

This is the difference to using an IPtr with addRef=false.

// DONT DO THIS:
IPtr<IPath> path (FHostCreate (IPath, hostClasses), false);
path = FHostCreate (IPath, hostClasses);
path = 0;

This will lead to a leak!

## Constructor & Destructor Documentation

OPtr | ( | I * | p | ) |
| inline

OPtr | ( | const IPtr< I > & | p | ) |
| inline

OPtr | ( | const OPtr< I > & | p | ) |
| inline

OPtr | ( |  | ) |
| inline

## Member Function Documentation

I* operator= | ( | I * | _ptr | ) |
| inline

Empty

Copyright ©2018 Steinberg Media Technologies GmbH. All Rights Reserved. This documentation is under this license.