147 lines
3.4 KiB
C++
147 lines
3.4 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser 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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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* $XConsortium: memory_pool.h /main/3 1996/06/11 17:17:31 cde-hal $
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*
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* Copyright (c) 1993 HAL Computer Systems International, Ltd.
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* All rights reserved. Unpublished -- rights reserved under
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* the Copyright Laws of the United States. USE OF A COPYRIGHT
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* NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
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* OR DISCLOSURE.
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*
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* THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
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* SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD. USE,
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* DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
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* PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
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* INTERNATIONAL, LTD.
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*
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* RESTRICTED RIGHTS LEGEND
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* Use, duplication, or disclosure by the Government is subject
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* to the restrictions as set forth in subparagraph (c)(l)(ii)
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* of the Rights in Technical Data and Computer Software clause
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* at DFARS 252.227-7013.
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*
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* HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
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* 1315 Dell Avenue
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* Campbell, CA 95008
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*
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*/
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#ifndef _memory_pool
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#define _memory_pool 1
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#include "utility/funcs.h"
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#include "dstr/dlist_void_ptr_cell.h"
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#include "dstr/dlist.h"
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#include "dstr/void_ptr_array.h"
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#define MAX_CHUNK_SZ 128
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class chunk_carrier;
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class chunk_manage_record_t : public dlist_cell
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{
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public:
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chunk_carrier* chunk_carrier_ptr;
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chunk_manage_record_t( chunk_carrier* chk_carr) :
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chunk_carrier_ptr(chk_carr) {};
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virtual ~chunk_manage_record_t() {};
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};
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typedef chunk_manage_record_t* chunk_manage_recordPtr;
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class chunk_carrier
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{
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public:
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chunk_carrier(int chunk_sz, int chunks);
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virtual ~chunk_carrier();
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dlist* init_ptrs();
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protected:
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int alloc_sz;
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int chunk_sz;
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int max_chunks;
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char* carrier_ptr;
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friend class fix_chunk_pool;
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friend class memory_pool;
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};
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class fix_chunk_pool
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{
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public:
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fix_chunk_pool(int chunk_sz);
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virtual ~fix_chunk_pool();
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// return char*
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virtual char* alloc();
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// free a char*
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virtual void free(char*);
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protected:
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int chunk_sz;
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int chunks;
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dlist chunk_carrier_list;
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dlist free_chunk_list;
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void init_one_chunk_carrier();
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};
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typedef void_ptr_array vm_pool_array_t;
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class memory_pool
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{
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public:
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memory_pool(int max_alloc_size = MAX_CHUNK_SZ);
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virtual ~memory_pool();
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// return char*
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virtual char* alloc(size_t sz);
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// free a char*
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virtual void free(char*);
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protected:
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int max_alloc_size_from_pool;
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vm_pool_array_t vm_pool_vector;
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};
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#ifdef C_API
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#define g_memory_pool *g_memory_pool_ptr
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extern memory_pool* g_memory_pool_ptr;
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#endif
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#endif
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