52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
/*
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* Copyright (c) 2009-2010 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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# include "permaheap.h"
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# include <cassert>
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permaheap::permaheap()
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{
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chunk_ptr_ = initial_chunk_.bytes;
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chunk_remaining_ = sizeof(initial_chunk_);
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heap_total_ = chunk_remaining_;
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}
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permaheap::~permaheap()
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{
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}
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void* permaheap::alloc(size_t size)
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{
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assert(size <= CHUNK_SIZE);
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if (size > chunk_remaining_) {
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chunk_ptr_ = ::new char[CHUNK_SIZE];
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chunk_remaining_ = CHUNK_SIZE;
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heap_total_ += CHUNK_SIZE;
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}
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assert( (size%sizeof(void*)) == 0 );
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void*res = chunk_ptr_;
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chunk_ptr_ += size;
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chunk_remaining_ -= size;
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return res;
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}
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