gecko-dev/xpcom/components/nsIGenericFactory.h

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/* -*- 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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#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_CONTRACTID "@mozilla.org/generic-factory;1"
#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 = nsnull);
////////////////////////////////////////////////////////////////////////////////
// Generic Modules
//
// (See xpcom/sample/nsSampleModule.cpp to see how to use this.)
#include "nsIModule.h"
typedef NS_CALLBACK(NSRegisterSelfProcPtr) (nsIComponentManager *aCompMgr,
nsIFile *aPath,
const char *registryLocation,
const char *componentType);
typedef NS_CALLBACK(NSUnregisterSelfProcPtr) (nsIComponentManager *aCompMgr,
nsIFile *aPath,
const char *registryLocation);
/**
* Use this type to define a list of module component info to pass to
* NS_NewGenericModule. E.g.:
* static nsModuleComponentInfo components[] = { ... };
* See xpcom/sample/nsSampleModule.cpp for more info.
*/
struct nsModuleComponentInfo {
const char* mDescription;
nsCID mCID;
const char* mContractID;
nsIGenericFactory::ConstructorProcPtr mConstructor;
NSRegisterSelfProcPtr mRegisterSelfProc;
NSUnregisterSelfProcPtr mUnregisterSelfProc;
};
typedef void (PR_CALLBACK *nsModuleDestructorProc) (nsIModule *self);
extern NS_COM nsresult
NS_NewGenericModule(const char* moduleName,
PRUint32 componentCount,
nsModuleComponentInfo* components,
nsModuleDestructorProc dtor,
nsIModule* *result);
#define NS_IMPL_NSGETMODULE(_name, _components) \
NS_IMPL_NSGETMODULE_WITH_DTOR(_name, _components, nsnull)
#define NS_IMPL_NSGETMODULE_WITH_DTOR(_name, _components, _dtor) \
\
PRUint32 NSGetModule_components_count = \
sizeof(_components) / sizeof(_components[0]); \
\
nsModuleComponentInfo* NSGetModule_components = (_components); \
\
extern "C" NS_EXPORT nsresult NSGetModule(nsIComponentManager *servMgr, \
nsIFile* location, \
nsIModule** result) \
{ \
return NS_NewGenericModule((_name), \
NSGetModule_components_count, \
NSGetModule_components, \
_dtor, result); \
}
////////////////////////////////////////////////////////////////////////////////
#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; \
return rv; \
} \
*aResult = NULL; \
if (NULL != aOuter) { \
rv = NS_ERROR_NO_AGGREGATION; \
return rv; \
} \
\
NS_NEWXPCOM(inst, _InstanceClass); \
if (NULL == inst) { \
rv = NS_ERROR_OUT_OF_MEMORY; \
return rv; \
} \
NS_ADDREF(inst); \
rv = inst->QueryInterface(aIID, aResult); \
NS_RELEASE(inst); \
\
return rv; \
} \
#define NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(_InstanceClass, _InitMethod) \
static NS_IMETHODIMP \
_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID, void **aResult) \
{ \
nsresult rv; \
\
_InstanceClass * inst; \
\
if (NULL == aResult) { \
rv = NS_ERROR_NULL_POINTER; \
return rv; \
} \
*aResult = NULL; \
if (NULL != aOuter) { \
rv = NS_ERROR_NO_AGGREGATION; \
return rv; \
} \
\
NS_NEWXPCOM(inst, _InstanceClass); \
if (NULL == inst) { \
rv = NS_ERROR_OUT_OF_MEMORY; \
return rv; \
} \
NS_ADDREF(inst); \
rv = inst->_InitMethod(); \
if(NS_SUCCEEDED(rv)) { \
rv = inst->QueryInterface(aIID, aResult); \
} \
NS_RELEASE(inst); \
\
return rv; \
} \
// 'Constructor' that uses an existing getter function that gets a singleton.
// NOTE: assumes that getter does an AddRef - so additional AddRef is not done.
#define NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR(_InstanceClass, _GetterProc) \
static NS_IMETHODIMP \
_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID, void **aResult) \
{ \
nsresult rv; \
\
_InstanceClass * inst; \
\
if (NULL == aResult) { \
rv = NS_ERROR_NULL_POINTER; \
return rv; \
} \
*aResult = NULL; \
if (NULL != aOuter) { \
rv = NS_ERROR_NO_AGGREGATION; \
return rv; \
} \
\
inst = _GetterProc(); \
if (NULL == inst) { \
rv = NS_ERROR_OUT_OF_MEMORY; \
return rv; \
} \
/* NS_ADDREF(inst); */ \
rv = inst->QueryInterface(aIID, aResult); \
NS_RELEASE(inst); \
\
return rv; \
} \
#endif /* nsIGenericFactory_h___ */