зеркало из https://github.com/mozilla/gecko-dev.git
98 строки
2.3 KiB
C++
98 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsArena.h"
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#include "nsCRT.h"
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ArenaImpl::ArenaImpl(void)
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: mInitialized(PR_FALSE)
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{
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NS_INIT_REFCNT();
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nsCRT::memset(&mPool, 0, sizeof(PLArenaPool));
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}
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NS_IMETHODIMP
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ArenaImpl::Init(PRUint32 aBlockSize)
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{
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if (aBlockSize < NS_MIN_ARENA_BLOCK_SIZE) {
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aBlockSize = NS_DEFAULT_ARENA_BLOCK_SIZE;
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}
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PL_INIT_ARENA_POOL(&mPool, "nsIArena", aBlockSize);
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mBlockSize = aBlockSize;
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mInitialized = PR_TRUE;
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS1(ArenaImpl, nsIArena)
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ArenaImpl::~ArenaImpl()
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{
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if (mInitialized)
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PL_FinishArenaPool(&mPool);
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mInitialized = PR_FALSE;
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}
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NS_IMETHODIMP_(void*)
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ArenaImpl::Alloc(PRUint32 size)
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{
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// Adjust size so that it's a multiple of sizeof(double)
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PRUint32 align = size & (sizeof(double) - 1);
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if (0 != align) {
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size += sizeof(double) - align;
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}
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void* p;
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PL_ARENA_ALLOCATE(p, &mPool, size);
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return p;
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}
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NS_METHOD
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ArenaImpl::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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ArenaImpl* it = new ArenaImpl();
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if (nsnull == it)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(it);
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nsresult rv = it->QueryInterface(aIID, aResult);
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NS_RELEASE(it);
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return rv;
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}
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NS_COM nsresult NS_NewHeapArena(nsIArena** aInstancePtrResult,
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PRUint32 aArenaBlockSize)
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{
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nsresult rv;
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nsIArena* arena;
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rv = ArenaImpl::Create(NULL, nsIArena::GetIID(), (void**)&arena);
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if (NS_FAILED(rv)) return rv;
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rv = arena->Init(aArenaBlockSize);
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if (NS_FAILED(rv)) {
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NS_RELEASE(arena);
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return rv;
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}
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*aInstancePtrResult = arena;
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return rv;
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}
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