mirror of
https://github.com/mozilla/gecko-dev.git
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a8939590de
The bulk of this commit was generated by running:
run-clang-tidy.py \
-checks='-*,llvm-namespace-comment' \
-header-filter=^/.../mozilla-central/.* \
-fix
406 lines
14 KiB
C++
406 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsXPCOM_h__
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#define nsXPCOM_h__
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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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#define DECL_STRUCT(c) struct c
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#else
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#define DECL_CLASS(c) typedef struct c c
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#define DECL_STRUCT(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(nsIDebug2);
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#ifdef __cplusplus
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namespace mozilla {
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struct Module;
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} // namespace mozilla
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#endif
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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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* @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 aResult The service manager. You may pass null.
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*
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* @param aBinDirectory The directory containing the component
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* registry and runtime libraries;
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* or use <CODE>nullptr</CODE> to use the working
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* directory.
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*
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* @param aAppFileLocationProvider The object to be used by Gecko that
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* specifies to Gecko where to find profiles, the
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* component registry preferences and so on; or use
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* <CODE>nullptr</CODE> for the default behaviour.
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*
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* @see NS_NewLocalFile
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* @see nsIFile
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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** aResult,
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nsIFile* aBinDirectory,
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nsIDirectoryServiceProvider* aAppFileLocationProvider);
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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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* @param aServMgr 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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XPCOM_API(nsresult) NS_ShutdownXPCOM(nsIServiceManager* aServMgr);
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/**
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* Public Method to access to the service manager.
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*
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* @param aResult 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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XPCOM_API(nsresult) NS_GetServiceManager(nsIServiceManager** aResult);
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/**
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* Public Method to access to the component manager.
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*
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* @param aResult 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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XPCOM_API(nsresult) NS_GetComponentManager(nsIComponentManager** aResult);
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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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* @param aResult 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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XPCOM_API(nsresult) NS_GetComponentRegistrar(nsIComponentRegistrar** aResult);
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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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* @param aResult 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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XPCOM_API(nsresult) NS_GetMemoryManager(nsIMemory** aResult);
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/**
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* Public Method to create an instance of a nsIFile. This function
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* may be called prior to NS_InitXPCOM.
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*
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* @param aPath
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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 aFollowLinks
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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 aResult Interface pointer to a new instance of an nsIFile
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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) NS_NewLocalFile(const nsAString& aPath,
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bool aFollowLinks,
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nsIFile** aResult);
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XPCOM_API(nsresult) NS_NewNativeLocalFile(const nsACString& aPath,
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bool aFollowLinks,
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nsIFile** aResult);
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#endif
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/**
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* Allocator functions for the standalone glue.
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* Do not use outside the xpcom glue code.
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* Use moz_xmalloc/moz_xrealloc/free, or new/delete instead.
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*/
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#ifdef XPCOM_GLUE
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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), the process aborts.
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*
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* @param aSize 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*) NS_Alloc(size_t aSize);
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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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* @param aPtr 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 aSize 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 aPtr is null, this function behaves like NS_Alloc.
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* If s is the size of the block to which aPtr points, the first min(s, size)
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* bytes of aPtr's block are copied to the new block. If the allocation
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* succeeds, aPtr is freed and a pointer to the new block is returned. If the
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* allocation fails, the process aborts.
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*/
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XPCOM_API(void*) NS_Realloc(void* aPtr, size_t aSize);
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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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* @param aPtr 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) NS_Free(void* aPtr);
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#else
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#define NS_Alloc moz_xmalloc
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#define NS_Realloc moz_xrealloc
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#define NS_Free free
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#endif
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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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{
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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) NS_DebugBreak(uint32_t aSeverity,
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const char* aStr, const char* aExpr,
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const char* aFile, int32_t 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) NS_LogInit();
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XPCOM_API(void) 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) NS_LogCtor(void* aPtr, const char* aTypeName,
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uint32_t aInstanceSize);
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XPCOM_API(void) NS_LogDtor(void* aPtr, const char* aTypeName,
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uint32_t 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) NS_LogAddRef(void* aPtr, nsrefcnt aNewRefCnt,
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const char* aTypeName, uint32_t aInstanceSize);
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XPCOM_API(void) NS_LogRelease(void* aPtr, nsrefcnt aNewRefCnt,
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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) NS_LogCOMPtrAddRef(void* aCOMPtr, nsISupports* aObject);
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XPCOM_API(void) 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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#ifdef __cplusplus
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class nsCycleCollectionParticipant;
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class nsCycleCollectingAutoRefCnt;
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XPCOM_API(void) NS_CycleCollectorSuspect3(void* aPtr,
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nsCycleCollectionParticipant* aCp,
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nsCycleCollectingAutoRefCnt* aRefCnt,
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bool* aShouldDelete);
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#endif
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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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#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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#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,
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* component must register their contract ID in the category manager,
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*
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* @see NS_XPCOM_STARTUP_CATEGORY
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*/
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#define NS_XPCOM_STARTUP_OBSERVER_ID "xpcom-startup"
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/**
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* At XPCOM shutdown, this topic is notified just before "xpcom-shutdown".
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* Components should only use this to mark themselves as 'being destroyed'.
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* Nothing should be dispatched to any event loop.
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*/
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#define NS_XPCOM_WILL_SHUTDOWN_OBSERVER_ID "xpcom-will-shutdown"
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/**
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* At XPCOM shutdown, this topic is notified. All components must
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* release any interface references to objects in other modules when
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* this topic is notified.
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*/
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#define NS_XPCOM_SHUTDOWN_OBSERVER_ID "xpcom-shutdown"
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/**
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* This topic is notified when an entry was added to a category in the
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* category manager. The subject of the notification will be the name of
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* the added entry as an nsISupportsCString, and the data will be the
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* name of the category. The notification will occur on the main thread.
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*/
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#define NS_XPCOM_CATEGORY_ENTRY_ADDED_OBSERVER_ID \
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"xpcom-category-entry-added"
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/**
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* This topic is notified when an entry was removed from a category in the
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* category manager. The subject of the notification will be the name of
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* the removed entry as an nsISupportsCString, and the data will be the
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* name of the category. The notification will occur on the main thread.
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*/
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#define NS_XPCOM_CATEGORY_ENTRY_REMOVED_OBSERVER_ID \
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"xpcom-category-entry-removed"
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/**
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* This topic is notified when an a category was cleared in the category
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* manager. The subject of the notification will be the category manager,
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* and the data will be the name of the cleared category.
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* The notification will occur on the main thread.
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*/
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#define NS_XPCOM_CATEGORY_CLEARED_OBSERVER_ID "xpcom-category-cleared"
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XPCOM_API(nsresult) NS_GetDebug(nsIDebug2** aResult);
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#endif
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