mirror of
https://github.com/rn10950/RetroZilla.git
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172 lines
5.0 KiB
C++
172 lines
5.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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*
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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 NSCATEGORYMANAGER_H
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#define NSCATEGORYMANAGER_H
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#include "prio.h"
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#include "prlock.h"
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#include "plarena.h"
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#include "nsClassHashtable.h"
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#include "nsICategoryManager.h"
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#define NS_CATEGORYMANAGER_CLASSNAME "Category Manager"
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/* 16d222a6-1dd2-11b2-b693-f38b02c021b2 */
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#define NS_CATEGORYMANAGER_CID \
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{ 0x16d222a6, 0x1dd2, 0x11b2, \
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{0xb6, 0x93, 0xf3, 0x8b, 0x02, 0xc0, 0x21, 0xb2} }
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/**
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* a "leaf-node", managed by the nsCategoryNode hashtable.
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*
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* we need to keep a "persistent value" (which will be written to the registry)
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* and a non-persistent value (for the current runtime): these are usually
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* the same, except when aPersist==PR_FALSE. The strings are permanently arena-
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* allocated, and will never go away.
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*/
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class CategoryLeaf : public nsDepCharHashKey
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{
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public:
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CategoryLeaf(const char* aKey)
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: nsDepCharHashKey(aKey),
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pValue(nsnull),
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nonpValue(nsnull) { }
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const char* pValue;
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const char* nonpValue;
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};
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/**
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* CategoryNode keeps a hashtable of it's entries.
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* the CategoryNode itself is permanently allocated in
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* the arena.
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*/
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class CategoryNode
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{
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public:
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NS_METHOD GetLeaf(const char* aEntryName,
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char** _retval);
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NS_METHOD AddLeaf(const char* aEntryName,
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const char* aValue,
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PRBool aPersist,
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PRBool aReplace,
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char** _retval,
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PLArenaPool* aArena);
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NS_METHOD DeleteLeaf(const char* aEntryName,
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PRBool aDontPersist);
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void Clear() {
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PR_Lock(mLock);
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mTable.Clear();
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PR_Unlock(mLock);
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}
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PRUint32 Count() {
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PR_Lock(mLock);
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PRUint32 tCount = mTable.Count();
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PR_Unlock(mLock);
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return tCount;
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}
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NS_METHOD Enumerate(nsISimpleEnumerator** _retval);
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PRBool WritePersistentEntries(PRFileDesc* fd, const char* aCategoryName);
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// CategoryNode is arena-allocated, with the strings
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static CategoryNode* Create(PLArenaPool* aArena);
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~CategoryNode();
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void operator delete(void*) { }
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private:
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CategoryNode() { }
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void* operator new(size_t aSize, PLArenaPool* aArena);
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nsTHashtable<CategoryLeaf> mTable;
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PRLock* mLock;
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};
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/**
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* The main implementation of nsICategoryManager.
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*
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* This implementation is thread-safe.
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*/
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class nsCategoryManager
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: public nsICategoryManager
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSICATEGORYMANAGER
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/**
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* Write the categories to the XPCOM persistent registry.
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* This is to be used by nsComponentManagerImpl (and NO ONE ELSE).
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*/
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NS_METHOD WriteCategoryManagerToRegistry(PRFileDesc* fd);
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/**
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* Suppress or unsuppress notifications of category changes to the
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* observer service. This is to be used by nsComponentManagerImpl
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* on startup while reading the stored category list.
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*/
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NS_METHOD SuppressNotifications(PRBool aSuppress);
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nsCategoryManager()
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: mSuppressNotifications(PR_FALSE) { }
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private:
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friend class nsCategoryManagerFactory;
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static nsCategoryManager* Create();
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~nsCategoryManager();
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CategoryNode* get_category(const char* aName);
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void NotifyObservers(const char* aTopic,
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const char* aCategoryName,
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const char* aEntryName);
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PLArenaPool mArena;
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nsClassHashtable<nsDepCharHashKey, CategoryNode> mTable;
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PRLock* mLock;
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PRBool mSuppressNotifications;
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};
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#endif
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