gecko-dev/xpcom/glue/nsIGenericFactory.h

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4.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIGenericFactory_h___
#define nsIGenericFactory_h___
#include "nsIFactory.h"
// {3bc97f01-ccdf-11d2-bab8-b548654461fc}
#define NS_GENERICFACTORY_CID \
{ 0x3bc97f01, 0xccdf, 0x11d2, { 0xba, 0xb8, 0xb5, 0x48, 0x65, 0x44, 0x61, 0xfc } }
// {3bc97f00-ccdf-11d2-bab8-b548654461fc}
#define NS_IGENERICFACTORY_IID \
{ 0x3bc97f00, 0xccdf, 0x11d2, { 0xba, 0xb8, 0xb5, 0x48, 0x65, 0x44, 0x61, 0xfc } }
#define NS_GENERICFACTORY_PROGID "component:/netscape/generic-factory"
#define NS_GENERICFACTORY_CLASSNAME "Generic Factory"
/**
* Provides a Generic nsIFactory implementation that can be used by
* DLLs with very simple factory needs.
*/
class nsIGenericFactory : public nsIFactory {
public:
static const nsIID& GetIID() { static nsIID iid = NS_IGENERICFACTORY_IID; return iid; }
typedef NS_CALLBACK(ConstructorProcPtr) (nsISupports *aOuter, REFNSIID aIID, void **aResult);
typedef NS_CALLBACK(DestructorProcPtr) (void);
/**
* Establishes the generic factory's constructor function, which will be called
* by CreateInstance.
*/
NS_IMETHOD SetConstructor(ConstructorProcPtr constructor) = 0;
/**
* Establishes the generic factory's destructor function, which will be called
* whe the generic factory is deleted. This is used to notify the DLL that
* an instance of one of its generic factories is going away.
*/
NS_IMETHOD SetDestructor(DestructorProcPtr destructor) = 0;
};
extern NS_COM nsresult
NS_NewGenericFactory(nsIGenericFactory* *result,
nsIGenericFactory::ConstructorProcPtr constructor,
nsIGenericFactory::DestructorProcPtr destructor = NULL);
#define NS_GENERIC_FACTORY_CONSTRUCTOR(_InstanceClass) \
static NS_IMETHODIMP \
_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID, void **aResult) \
{ \
nsresult rv; \
\
_InstanceClass * inst; \
\
if (NULL == aResult) { \
rv = NS_ERROR_NULL_POINTER; \
goto done; \
} \
*aResult = NULL; \
if (NULL != aOuter) { \
rv = NS_ERROR_NO_AGGREGATION; \
goto done; \
} \
\
NS_NEWXPCOM(inst, _InstanceClass); \
if (NULL == inst) { \
rv = NS_ERROR_OUT_OF_MEMORY; \
goto done; \
} \
NS_ADDREF(inst); \
rv = inst->QueryInterface(aIID, aResult); \
NS_RELEASE(inst); \
\
done: \
return rv; \
}
#endif /* nsIGenericFactory_h___ */