gecko/xpcom/components/Module.h
2012-04-24 12:54:16 -04:00

148 lines
4.6 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 Firefox.
*
* The Initial Developer of the Original Code is
* the Mozilla Foundation <http://www.mozilla.org>.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef mozilla_Module_h
#define mozilla_Module_h
#include "nscore.h"
#include "nsID.h"
#include "nsIFactory.h"
#include "nsCOMPtr.h" // for already_AddRefed
namespace mozilla {
/**
* A module implements one or more XPCOM components. This structure is used
* for both binary and script modules, but the registration members
* (cids/contractids/categoryentries) are unused for modules which are loaded
* via a module loader.
*/
struct Module
{
static const unsigned int kVersion = 15;
struct CIDEntry;
typedef already_AddRefed<nsIFactory> (*GetFactoryProcPtr)
(const Module& module, const CIDEntry& entry);
typedef nsresult (*ConstructorProcPtr)(nsISupports* aOuter,
const nsIID& aIID,
void** aResult);
typedef nsresult (*LoadFuncPtr)();
typedef void (*UnloadFuncPtr)();
/**
* The constructor callback is an implementation detail of the default binary
* loader and may be null.
*/
struct CIDEntry
{
const nsCID* cid;
bool service;
GetFactoryProcPtr getFactoryProc;
ConstructorProcPtr constructorProc;
};
struct ContractIDEntry
{
const char* contractid;
nsID const * cid;
};
struct CategoryEntry
{
const char* category;
const char* entry;
const char* value;
};
/**
* Binary compatibility check, should be kModuleVersion.
*/
unsigned int mVersion;
/**
* An array of CIDs (class IDs) implemented by this module. The final entry
* should be { NULL }.
*/
const CIDEntry* mCIDs;
/**
* An array of mappings from contractid to CID. The final entry should
* be { NULL }.
*/
const ContractIDEntry* mContractIDs;
/**
* An array of category manager entries. The final entry should be
* { NULL }.
*/
const CategoryEntry* mCategoryEntries;
/**
* When the component manager tries to get the factory for a CID, it first
* checks for this module-level getfactory callback. If this function is
* not implemented, it checks the CIDEntry getfactory callback. If that is
* also NULL, a generic factory is generated using the CIDEntry constructor
* callback which must be non-NULL.
*/
GetFactoryProcPtr getFactoryProc;
/**
* Optional Function which are called when this module is loaded and
* at shutdown. These are not C++ constructor/destructors to avoid
* calling them too early in startup or too late in shutdown.
*/
LoadFuncPtr loadProc;
UnloadFuncPtr unloadProc;
};
} // namespace
#if defined(XPCOM_TRANSLATE_NSGM_ENTRY_POINT)
# define NSMODULE_NAME(_name) _name##_NSModule
# define NSMODULE_DECL(_name) extern mozilla::Module const *const NSMODULE_NAME(_name)
# define NSMODULE_DEFN(_name) NSMODULE_DECL(_name)
#else
# define NSMODULE_NAME(_name) NSModule
# define NSMODULE_DEFN(_name) extern "C" NS_EXPORT mozilla::Module const *const NSModule
#endif
#endif // mozilla_Module_h