mirror of
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557 lines
19 KiB
C
557 lines
19 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Benjamin Smedberg <benjamin@smedbergs.us>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsXPCOM_h__
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#define nsXPCOM_h__
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/* Map frozen functions to private symbol names if not using strict API. */
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#ifdef MOZILLA_INTERNAL_API
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# define NS_InitXPCOM2 NS_InitXPCOM2_P
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# define NS_InitXPCOM3 NS_InitXPCOM3_P
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# define NS_ShutdownXPCOM NS_ShutdownXPCOM_P
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# define NS_GetServiceManager NS_GetServiceManager_P
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# define NS_GetComponentManager NS_GetComponentManager_P
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# define NS_GetComponentRegistrar NS_GetComponentRegistrar_P
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# define NS_GetMemoryManager NS_GetMemoryManager_P
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# define NS_NewLocalFile NS_NewLocalFile_P
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# define NS_NewNativeLocalFile NS_NewNativeLocalFile_P
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# define NS_GetDebug NS_GetDebug_P
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# define NS_GetTraceRefcnt NS_GetTraceRefcnt_P
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# define NS_Alloc NS_Alloc_P
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# define NS_Realloc NS_Realloc_P
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# define NS_Free NS_Free_P
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# define NS_DebugBreak NS_DebugBreak_P
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# define NS_LogInit NS_LogInit_P
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# define NS_LogTerm NS_LogTerm_P
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# define NS_LogAddRef NS_LogAddRef_P
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# define NS_LogRelease NS_LogRelease_P
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# define NS_LogCtor NS_LogCtor_P
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# define NS_LogDtor NS_LogDtor_P
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# define NS_LogCOMPtrAddRef NS_LogCOMPtrAddRef_P
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# define NS_LogCOMPtrRelease NS_LogCOMPtrRelease_P
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# define NS_CycleCollectorSuspect NS_CycleCollectorSuspect_P
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# define NS_CycleCollectorForget NS_CycleCollectorForget_P
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#endif
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#include "nscore.h"
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#include "nsXPCOMCID.h"
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#ifdef __cplusplus
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#define DECL_CLASS(c) class c
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#else
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#define DECL_CLASS(c) typedef struct c c
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#endif
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DECL_CLASS(nsAString);
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DECL_CLASS(nsACString);
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DECL_CLASS(nsISupports);
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DECL_CLASS(nsIModule);
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DECL_CLASS(nsIComponentManager);
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DECL_CLASS(nsIComponentRegistrar);
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DECL_CLASS(nsIServiceManager);
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DECL_CLASS(nsIFile);
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DECL_CLASS(nsILocalFile);
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DECL_CLASS(nsIDirectoryServiceProvider);
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DECL_CLASS(nsIMemory);
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DECL_CLASS(nsIDebug);
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DECL_CLASS(nsITraceRefcnt);
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/**
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* Every XPCOM component implements this function signature, which is the
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* only entrypoint XPCOM uses to the function.
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*
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* @status FROZEN
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*/
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typedef nsresult (PR_CALLBACK *nsGetModuleProc)(nsIComponentManager *aCompMgr,
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nsIFile* location,
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nsIModule** return_cobj);
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/**
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* Initialises XPCOM. You must call one of the NS_InitXPCOM methods
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* before proceeding to use xpcom. The one exception is that you may
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* call NS_NewLocalFile to create a nsIFile.
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*
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* @status FROZEN
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*
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* @note Use <CODE>NS_NewLocalFile</CODE> or <CODE>NS_NewNativeLocalFile</CODE>
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* to create the file object you supply as the bin directory path in this
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* call. The function may be safely called before the rest of XPCOM or
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* embedding has been initialised.
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*
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* @param result The service manager. You may pass null.
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*
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* @param binDirectory The directory containing the component
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* registry and runtime libraries;
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* or use <CODE>nsnull</CODE> to use the working
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* directory.
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*
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* @param appFileLocationProvider The object to be used by Gecko that specifies
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* to Gecko where to find profiles, the component
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* registry preferences and so on; or use
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* <CODE>nsnull</CODE> for the default behaviour.
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*
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* @see NS_NewLocalFile
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* @see nsILocalFile
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* @see nsIDirectoryServiceProvider
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*
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* @return NS_OK for success;
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* NS_ERROR_NOT_INITIALIZED if static globals were not initialized,
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* which can happen if XPCOM is reloaded, but did not completly
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* shutdown. Other error codes indicate a failure during
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* initialisation.
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*/
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XPCOM_API(nsresult)
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NS_InitXPCOM2(nsIServiceManager* *result,
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nsIFile* binDirectory,
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nsIDirectoryServiceProvider* appFileLocationProvider);
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/**
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* Some clients of XPCOM have statically linked components (not dynamically
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* loaded component DLLs), which can be passed to NS_InitXPCOM3 using this
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* structure.
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*
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* @status FROZEN
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*/
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typedef struct nsStaticModuleInfo {
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const char *name;
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nsGetModuleProc getModule;
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} nsStaticModuleInfo;
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/**
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* Initialises XPCOM with static components. You must call one of the
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* NS_InitXPCOM methods before proceeding to use xpcom. The one
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* exception is that you may call NS_NewLocalFile to create a nsIFile.
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*
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* @status FROZEN
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*
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* @note Use <CODE>NS_NewLocalFile</CODE> or <CODE>NS_NewNativeLocalFile</CODE>
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* to create the file object you supply as the bin directory path in this
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* call. The function may be safely called before the rest of XPCOM or
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* embedding has been initialised.
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*
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* @param result The service manager. You may pass null.
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*
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* @param binDirectory The directory containing the component
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* registry and runtime libraries;
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* or use <CODE>nsnull</CODE> to use the working
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* directory.
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*
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* @param appFileLocationProvider The object to be used by Gecko that specifies
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* to Gecko where to find profiles, the component
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* registry preferences and so on; or use
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* <CODE>nsnull</CODE> for the default behaviour.
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*
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* @param staticComponents An array of static components. Passing null causes
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* default (builtin) components to be registered, if
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* present.
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* @param componentCount Number of elements in staticComponents
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*
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* @see NS_NewLocalFile
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* @see nsILocalFile
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* @see nsIDirectoryServiceProvider
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* @see XRE_GetStaticComponents
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*
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* @return NS_OK for success;
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* NS_ERROR_NOT_INITIALIZED if static globals were not initialized,
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* which can happen if XPCOM is reloaded, but did not completly
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* shutdown. Other error codes indicate a failure during
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* initialisation.
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*/
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XPCOM_API(nsresult)
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NS_InitXPCOM3(nsIServiceManager* *result,
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nsIFile* binDirectory,
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nsIDirectoryServiceProvider* appFileLocationProvider,
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nsStaticModuleInfo const *staticComponents,
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PRUint32 componentCount);
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/**
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* Shutdown XPCOM. You must call this method after you are finished
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* using xpcom.
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*
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* @status FROZEN
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*
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* @param servMgr The service manager which was returned by NS_InitXPCOM.
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* This will release servMgr. You may pass null.
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*
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* @return NS_OK for success;
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* other error codes indicate a failure during initialisation.
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*
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*/
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XPCOM_API(nsresult)
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NS_ShutdownXPCOM(nsIServiceManager* servMgr);
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/**
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* Public Method to access to the service manager.
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*
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* @status FROZEN
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* @param result Interface pointer to the service manager
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*
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* @return NS_OK for success;
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* other error codes indicate a failure during initialisation.
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*
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*/
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XPCOM_API(nsresult)
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NS_GetServiceManager(nsIServiceManager* *result);
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/**
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* Public Method to access to the component manager.
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*
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* @status FROZEN
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* @param result Interface pointer to the service
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*
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* @return NS_OK for success;
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* other error codes indicate a failure during initialisation.
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*
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*/
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XPCOM_API(nsresult)
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NS_GetComponentManager(nsIComponentManager* *result);
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/**
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* Public Method to access to the component registration manager.
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*
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* @status FROZEN
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* @param result Interface pointer to the service
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*
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* @return NS_OK for success;
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* other error codes indicate a failure during initialisation.
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*
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*/
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XPCOM_API(nsresult)
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NS_GetComponentRegistrar(nsIComponentRegistrar* *result);
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/**
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* Public Method to access to the memory manager. See nsIMemory
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*
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* @status FROZEN
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* @param result Interface pointer to the memory manager
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*
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* @return NS_OK for success;
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* other error codes indicate a failure during initialisation.
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*
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*/
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XPCOM_API(nsresult)
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NS_GetMemoryManager(nsIMemory* *result);
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/**
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* Public Method to create an instance of a nsILocalFile. This function
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* may be called prior to NS_InitXPCOM.
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*
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* @status FROZEN
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*
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* @param path
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* A string which specifies a full file path to a
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* location. Relative paths will be treated as an
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* error (NS_ERROR_FILE_UNRECOGNIZED_PATH).
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* |NS_NewNativeLocalFile|'s path must be in the
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* filesystem charset.
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* @param followLinks
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* This attribute will determine if the nsLocalFile will auto
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* resolve symbolic links. By default, this value will be false
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* on all non unix systems. On unix, this attribute is effectively
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* a noop.
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* @param result Interface pointer to a new instance of an nsILocalFile
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*
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* @return NS_OK for success;
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* other error codes indicate a failure.
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*/
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#ifdef __cplusplus
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XPCOM_API(nsresult)
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NS_NewLocalFile(const nsAString &path,
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PRBool followLinks,
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nsILocalFile* *result);
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XPCOM_API(nsresult)
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NS_NewNativeLocalFile(const nsACString &path,
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PRBool followLinks,
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nsILocalFile* *result);
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#endif
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/**
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* Allocates a block of memory of a particular size. If the memory cannot
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* be allocated (because of an out-of-memory condition), null is returned.
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*
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* @status FROZEN
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*
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* @param size The size of the block to allocate
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* @result The block of memory
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* @note This function is thread-safe.
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*/
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XPCOM_API(void*)
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NS_Alloc(PRSize size);
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/**
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* Reallocates a block of memory to a new size.
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*
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* @status FROZEN
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*
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* @param ptr The block of memory to reallocate. This block must originally
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have been allocated by NS_Alloc or NS_Realloc
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* @param size The new size. If 0, frees the block like NS_Free
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* @result The reallocated block of memory
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* @note This function is thread-safe.
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*
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* If ptr is null, this function behaves like NS_Alloc.
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* If s is the size of the block to which ptr points, the first min(s, size)
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* bytes of ptr's block are copied to the new block. If the allocation
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* succeeds, ptr is freed and a pointer to the new block is returned. If the
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* allocation fails, ptr is not freed and null is returned. The returned
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* value may be the same as ptr.
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*/
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XPCOM_API(void*)
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NS_Realloc(void* ptr, PRSize size);
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/**
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* Frees a block of memory. Null is a permissible value, in which case no
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* action is taken.
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*
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* @status FROZEN
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*
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* @param ptr The block of memory to free. This block must originally have
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* been allocated by NS_Alloc or NS_Realloc
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* @note This function is thread-safe.
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*/
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XPCOM_API(void)
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NS_Free(void* ptr);
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/**
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* Support for warnings, assertions, and debugging breaks.
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*/
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enum {
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NS_DEBUG_WARNING = 0,
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NS_DEBUG_ASSERTION = 1,
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NS_DEBUG_BREAK = 2,
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NS_DEBUG_ABORT = 3
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};
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/**
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* Print a runtime assertion. This function is available in both debug and
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* release builds.
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*
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* @note Based on the value of aSeverity and the XPCOM_DEBUG_BREAK
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* environment variable, this function may cause the application to
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* print the warning, print a stacktrace, break into a debugger, or abort
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* immediately.
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*
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* @param aSeverity A NS_DEBUG_* value
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* @param aStr A readable error message (ASCII, may be null)
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* @param aExpr The expression evaluated (may be null)
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* @param aFile The source file containing the assertion (may be null)
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* @param aLine The source file line number (-1 indicates no line number)
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*/
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XPCOM_API(void)
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NS_DebugBreak(PRUint32 aSeverity,
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const char *aStr, const char *aExpr,
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const char *aFile, PRInt32 aLine);
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/**
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* Perform a stack-walk to a debugging log under various
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* circumstances. Used to aid debugging of leaked object graphs.
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*
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* The NS_Log* functions are available in both debug and release
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* builds of XPCOM, but the output will be useless unless binary
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* debugging symbols for all modules in the stacktrace are available.
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*/
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/**
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* By default, refcount logging is enabled at NS_InitXPCOM and
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* refcount statistics are printed at NS_ShutdownXPCOM. NS_LogInit and
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* NS_LogTerm allow applications to enable logging earlier and delay
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* printing of logging statistics. They should always be used as a
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* matched pair.
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*/
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XPCOM_API(void)
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NS_LogInit();
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XPCOM_API(void)
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NS_LogTerm();
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/**
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* Log construction and destruction of objects. Processing tools can use the
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* stacktraces printed by these functions to identify objects that are being
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* leaked.
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*
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* @param aPtr A pointer to the concrete object.
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* @param aTypeName The class name of the type
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* @param aInstanceSize The size of the type
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*/
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XPCOM_API(void)
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NS_LogCtor(void *aPtr, const char *aTypeName, PRUint32 aInstanceSize);
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XPCOM_API(void)
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NS_LogDtor(void *aPtr, const char *aTypeName, PRUint32 aInstanceSize);
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/**
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* Log a stacktrace when an XPCOM object's refcount is incremented or
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* decremented. Processing tools can use the stacktraces printed by these
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* functions to identify objects that were leaked due to XPCOM references.
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*
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* @param aPtr A pointer to the concrete object
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* @param aNewRefCnt The new reference count.
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* @param aTypeName The class name of the type
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* @param aInstanceSize The size of the type
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*/
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XPCOM_API(void)
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NS_LogAddRef(void *aPtr, nsrefcnt aNewRefCnt,
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const char *aTypeName, PRUint32 aInstanceSize);
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XPCOM_API(void)
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NS_LogRelease(void *aPtr, nsrefcnt aNewRefCnt, const char *aTypeName);
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/**
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* Log reference counting performed by COMPtrs. Processing tools can
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* use the stacktraces printed by these functions to simplify reports
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* about leaked objects generated from the data printed by
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* NS_LogAddRef/NS_LogRelease.
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*
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* @param aCOMPtr the address of the COMPtr holding a strong reference
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* @param aObject the object being referenced by the COMPtr
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*/
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XPCOM_API(void)
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NS_LogCOMPtrAddRef(void *aCOMPtr, nsISupports *aObject);
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XPCOM_API(void)
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NS_LogCOMPtrRelease(void *aCOMPtr, nsISupports *aObject);
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/**
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* The XPCOM cycle collector analyzes and breaks reference cycles between
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* participating XPCOM objects. All objects in the cycle must implement
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* nsCycleCollectionParticipant to break cycles correctly.
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*/
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XPCOM_API(PRBool)
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NS_CycleCollectorSuspect(nsISupports *n);
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XPCOM_API(PRBool)
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NS_CycleCollectorForget(nsISupports *n);
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/**
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* Categories (in the category manager service) used by XPCOM:
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*/
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/**
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* A category which is read after component registration but before
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* the "xpcom-startup" notifications. Each category entry is treated
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* as the contract ID of a service which implements
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* nsIDirectoryServiceProvider. Each directory service provider is
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* installed in the global directory service.
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*
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* @status FROZEN
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*/
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#define XPCOM_DIRECTORY_PROVIDER_CATEGORY "xpcom-directory-providers"
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/**
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* A category which is read after component registration but before
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* NS_InitXPCOM returns. Each category entry is treated as the contractID of
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* a service: each service is instantiated, and if it implements nsIObserver
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* the nsIObserver.observe method is called with the "xpcom-startup" topic.
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*
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* @status FROZEN
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*/
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#define NS_XPCOM_STARTUP_CATEGORY "xpcom-startup"
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/**
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* Observer topics (in the observer service) used by XPCOM:
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*/
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/**
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* At XPCOM startup after component registration is complete, the
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|
* following topic is notified. In order to receive this notification,
|
|
* component must register their contract ID in the category manager,
|
|
*
|
|
* @see NS_XPCOM_STARTUP_CATEGORY
|
|
* @status FROZEN
|
|
*/
|
|
#define NS_XPCOM_STARTUP_OBSERVER_ID "xpcom-startup"
|
|
|
|
/**
|
|
* At XPCOM shutdown, this topic is notified. All components must
|
|
* release any interface references to objects in other modules when
|
|
* this topic is notified.
|
|
*
|
|
* @status FROZEN
|
|
*/
|
|
#define NS_XPCOM_SHUTDOWN_OBSERVER_ID "xpcom-shutdown"
|
|
|
|
/**
|
|
* This topic is notified when an entry was added to a category in the
|
|
* category manager. The subject of the notification will be the name of
|
|
* the added entry as an nsISupportsCString, and the data will be the
|
|
* name of the category. The notification will occur on the main thread.
|
|
*
|
|
* @status FROZEN
|
|
*/
|
|
#define NS_XPCOM_CATEGORY_ENTRY_ADDED_OBSERVER_ID \
|
|
"xpcom-category-entry-added"
|
|
|
|
/**
|
|
* This topic is notified when an entry was removed from a category in the
|
|
* category manager. The subject of the notification will be the name of
|
|
* the removed entry as an nsISupportsCString, and the data will be the
|
|
* name of the category. The notification will occur on the main thread.
|
|
*
|
|
* @status FROZEN
|
|
*/
|
|
#define NS_XPCOM_CATEGORY_ENTRY_REMOVED_OBSERVER_ID \
|
|
"xpcom-category-entry-removed"
|
|
|
|
/**
|
|
* This topic is notified when an a category was cleared in the category
|
|
* manager. The subject of the notification will be the category manager,
|
|
* and the data will be the name of the cleared category.
|
|
* The notification will occur on the main thread.
|
|
*
|
|
* @status FROZEN
|
|
*/
|
|
#define NS_XPCOM_CATEGORY_CLEARED_OBSERVER_ID "xpcom-category-cleared"
|
|
|
|
XPCOM_API(nsresult)
|
|
NS_GetDebug(nsIDebug* *result);
|
|
|
|
XPCOM_API(nsresult)
|
|
NS_GetTraceRefcnt(nsITraceRefcnt* *result);
|
|
|
|
#endif
|