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97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
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/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
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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 [Open Source Virtual Machine].
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*
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* The Initial Developer of the Original Code is
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* Adobe System Incorporated.
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* Portions created by the Initial Developer are Copyright (C) 2004-2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Adobe AS3 Team
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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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#include "nanojit.h"
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#ifdef FEATURE_NANOJIT
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namespace nanojit
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{
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Allocator::Allocator()
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: current_chunk(NULL)
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, current_top(NULL)
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, current_limit(NULL)
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{ }
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Allocator::~Allocator()
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{
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reset();
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}
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void Allocator::reset()
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{
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Chunk *c = current_chunk;
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while (c) {
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Chunk *prev = c->prev;
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freeChunk(c);
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c = prev;
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}
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current_chunk = NULL;
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current_top = NULL;
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current_limit = NULL;
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postReset();
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}
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void* Allocator::allocSlow(size_t nbytes)
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{
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NanoAssert((nbytes & 7) == 0);
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fill(nbytes);
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NanoAssert(current_top + nbytes <= current_limit);
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void* p = current_top;
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current_top += nbytes;
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return p;
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}
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void Allocator::fill(size_t nbytes)
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{
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const size_t minChunk = 2000;
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if (nbytes < minChunk)
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nbytes = minChunk;
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size_t chunkbytes = sizeof(Chunk) + nbytes - sizeof(int64_t);
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void* mem = allocChunk(chunkbytes);
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Chunk* chunk = (Chunk*) mem;
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chunk->prev = current_chunk;
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current_chunk = chunk;
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current_top = (char*)chunk->data;
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current_limit = (char*)mem + chunkbytes;
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}
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}
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#endif // FEATURE_NANOJIT
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