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/* -*- Mode: C++; tab-width: 2; 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 NSCATEGORYMANAGER_H
#define NSCATEGORYMANAGER_H
#include "prio.h"
#include "prlock.h"
#include "plarena.h"
#include "nsClassHashtable.h"
#include "nsICategoryManager.h"
#define NS_CATEGORYMANAGER_CLASSNAME "Category Manager"
/* 16d222a6-1dd2-11b2-b693-f38b02c021b2 */
#define NS_CATEGORYMANAGER_CID \
{ 0x16d222a6, 0x1dd2, 0x11b2, \
{0xb6, 0x93, 0xf3, 0x8b, 0x02, 0xc0, 0x21, 0xb2} }
/**
* a "leaf-node", managed by the nsCategoryNode hashtable.
*
* we need to keep a "persistent value" (which will be written to the registry)
* and a non-persistent value (for the current runtime): these are usually
* the same, except when aPersist==PR_FALSE. The strings are permanently arena-
* allocated, and will never go away.
*/
class CategoryLeaf : public nsDepCharHashKey
{
public:
CategoryLeaf(const char* aKey)
: nsDepCharHashKey(aKey),
pValue(nsnull),
nonpValue(nsnull) { }
const char* pValue;
const char* nonpValue;
};
/**
* CategoryNode keeps a hashtable of it's entries.
* the CategoryNode itself is permanently allocated in
* the arena.
*/
class CategoryNode
{
public:
NS_METHOD GetLeaf(const char* aEntryName,
char** _retval);
NS_METHOD AddLeaf(const char* aEntryName,
const char* aValue,
PRBool aPersist,
PRBool aReplace,
char** _retval,
PLArenaPool* aArena);
NS_METHOD DeleteLeaf(const char* aEntryName,
PRBool aDontPersist);
void Clear() {
PR_Lock(mLock);
mTable.Clear();
PR_Unlock(mLock);
}
PRUint32 Count() {
PR_Lock(mLock);
PRUint32 tCount = mTable.Count();
PR_Unlock(mLock);
return tCount;
}
NS_METHOD Enumerate(nsISimpleEnumerator** _retval);
PRBool WritePersistentEntries(PRFileDesc* fd, const char* aCategoryName);
// CategoryNode is arena-allocated, with the strings
static CategoryNode* Create(PLArenaPool* aArena);
~CategoryNode();
void operator delete(void*) { }
private:
CategoryNode() : mLock(nsnull) { }
void* operator new(size_t aSize, PLArenaPool* aArena);
nsTHashtable<CategoryLeaf> mTable;
PRLock* mLock;
};
/**
* The main implementation of nsICategoryManager.
*
* This implementation is thread-safe.
*/
class nsCategoryManager
: public nsICategoryManager
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSICATEGORYMANAGER
/**
* Write the categories to the XPCOM persistent registry.
* This is to be used by nsComponentManagerImpl (and NO ONE ELSE).
*/
NS_METHOD WriteCategoryManagerToRegistry(PRFileDesc* fd);
nsCategoryManager() : mLock(nsnull) { }
private:
friend class nsCategoryManagerFactory;
static nsCategoryManager* Create();
~nsCategoryManager();
CategoryNode* get_category(const char* aName);
PLArenaPool mArena;
nsClassHashtable<nsDepCharHashKey, CategoryNode> mTable;
PRLock* mLock;
};
#endif
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