Steinberg::FUnknown Class Reference

#include <funknown.h>

Inheritance diagram for Steinberg::FUnknown:

Public Member Functions
virtual tresult PLUGIN_API	queryInterface (const TUID _iid, void **obj)=0
virtual uint32 PLUGIN_API	addRef ()=0
virtual uint32 PLUGIN_API	release ()=0

Static Public Attributes
static const FUID	iid

Detailed Description

The basic interface of all interfaces.

• The FUnknown::queryInterface method is used to retrieve pointers to other interfaces of the object.
• FUnknown::addRef and FUnknown::release manage the lifetime of the object. If no more references exist, the object is destroyed in memory.

Interfaces are identified by 16 byte Globally Unique Identifiers. The SDK provides a class called FUID for this purpose.

howtoClass

Member Function Documentation

addRef()

virtual uint32 PLUGIN_API Steinberg::FUnknown::addRef ( )

pure virtual

Adds a reference and returns the new reference count.

Remarks:

The initial reference count after creating an object is 1.

Implemented in Steinberg::FObject.

queryInterface()

virtual tresult PLUGIN_API Steinberg::FUnknown::queryInterface ( const TUID _iid, void ** obj )

pure virtual

Query for a pointer to the specified interface. Returns kResultOk on success or kNoInterface if the object does not implement the interface. The object has to call addRef when returning an interface.

Parameters

_iid	: (in) 16 Byte interface identifier (-> FUID)
obj	: (out) On return, *obj points to the requested interface

Implemented in Steinberg::FObject.

release()

virtual uint32 PLUGIN_API Steinberg::FUnknown::release ( )

pure virtual

Releases a reference and returns the new reference count. If the reference count reaches zero, the object will be destroyed in memory.

Implemented in Steinberg::FObject.

Member Data Documentation

iid

const FUID Steinberg::FUnknown::iid

static

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The documentation for this class was generated from the following file:

• /home/runner/work/lmms-fork/lmms-fork/plugins/CarlaBase/carla/source/includes/vst3sdk/pluginterfaces/base/funknown.h