зеркало из https://github.com/mozilla/gecko-dev.git
122 строки
2.9 KiB
C++
122 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
#include "nsISizeOfHandler.h"
|
|
#include "plhash.h"
|
|
|
|
static NS_DEFINE_IID(kISizeOfHandlerIID, NS_ISIZEOF_HANDLER_IID);
|
|
|
|
class nsSizeOfHandler : public nsISizeOfHandler {
|
|
public:
|
|
nsSizeOfHandler();
|
|
virtual ~nsSizeOfHandler();
|
|
|
|
// nsISupports
|
|
NS_DECL_ISUPPORTS
|
|
|
|
// nsISizeOfHandler
|
|
NS_IMETHOD Add(size_t aSize);
|
|
virtual PRBool HaveSeen(void* anObject);
|
|
NS_IMETHOD GetSize(PRUint32& aResult);
|
|
|
|
protected:
|
|
PRUint32 mTotalSize;
|
|
PLHashTable* mTable;
|
|
};
|
|
|
|
static PLHashNumber
|
|
HashKey(void* key)
|
|
{
|
|
return (PLHashNumber) key;
|
|
}
|
|
|
|
static PRIntn
|
|
CompareKeys(void* key1, void* key2)
|
|
{
|
|
return key1 == key2;
|
|
}
|
|
|
|
nsSizeOfHandler::nsSizeOfHandler()
|
|
{
|
|
NS_INIT_REFCNT();
|
|
mTotalSize = 0;
|
|
mTable = PL_NewHashTable(8, (PLHashFunction) HashKey,
|
|
(PLHashComparator) CompareKeys,
|
|
(PLHashComparator) nsnull,
|
|
nsnull, nsnull);
|
|
}
|
|
|
|
nsSizeOfHandler::~nsSizeOfHandler()
|
|
{
|
|
if (nsnull != mTable) {
|
|
PL_HashTableDestroy(mTable);
|
|
}
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsSizeOfHandler, kISizeOfHandlerIID)
|
|
|
|
NS_IMETHODIMP
|
|
nsSizeOfHandler::Add(size_t aSize)
|
|
{
|
|
mTotalSize += aSize;
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsSizeOfHandler::HaveSeen(void* anObject)
|
|
{
|
|
if (nsnull == mTable) {
|
|
// When we run out of memory, HaveSeen returns PR_TRUE to stop
|
|
// wasting time.
|
|
return PR_TRUE;
|
|
}
|
|
|
|
if (nsnull != anObject) {
|
|
PRInt32 hashCode = (PRInt32) anObject;
|
|
PLHashEntry** hep = PL_HashTableRawLookup(mTable, hashCode, anObject);
|
|
PLHashEntry* he = *hep;
|
|
if (nsnull != he) {
|
|
return PR_TRUE;
|
|
}
|
|
he = PL_HashTableRawAdd(mTable, hep, hashCode, anObject, anObject);
|
|
if (nsnull == he) {
|
|
// When we run out of memory, HaveSeen returns PR_TRUE to stop
|
|
// wasting time.
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSizeOfHandler::GetSize(PRUint32& aResult)
|
|
{
|
|
aResult = mTotalSize;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_COM nsresult
|
|
NS_NewSizeOfHandler(nsISizeOfHandler** aInstancePtrResult)
|
|
{
|
|
nsISizeOfHandler *it = new nsSizeOfHandler();
|
|
if (it == nsnull) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
return it->QueryInterface(kISizeOfHandlerIID, (void **) aInstancePtrResult);
|
|
}
|