2019-05-27 19:21:11 +02:00
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//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Memory allocation functions //
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// //
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// //
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2020-02-06 14:23:26 +01:00
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// Copyright © 2018-2020 The OS/K Team //
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2019-05-27 19:21:11 +02:00
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K 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 OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#ifndef _KERNEL_H
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#include <kernel.h>
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#endif
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#ifndef _LIB_LIST_H
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#include <lib/list.h>
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#endif
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#ifndef _MM_MALLOC_H
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#define _MM_MALLOC_H
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#ifndef PAGESIZE
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#define PAGESIZE 4096
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#endif
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typedef struct Cache_t Cache_t;
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typedef struct Pool_t Pool_t;
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// Operation on objects
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typedef void (*ObjCtor_t)(Cache_t *cache,
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Pool_t *pool,
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void *obj);
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//
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// A cache containing many pools
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//
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struct Cache_t
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{
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// Synchronization
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Spinlock_t lock;
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// Cache name
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char name[64];
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// Size of each object
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size_t objsize;
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// Number of objects allocated
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size_t objused;
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// Number of available objects including unused
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size_t objtotal;
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// Number of objects per pool
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size_t objperpool;
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// Object constructor
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ObjOper_t *ctor;
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// Object destructor
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ObjOper_t *dtor;
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// Object pools without any allocated object
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ListHead_t *freepools;
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// Object pools containing some allocated objects
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ListHead_t *usedpools;
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// Objects pools containing no unallocated object
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ListHead_t *fullpools;
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};
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//
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// A pool of allocable objects
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// Takes a fixed amount of pages
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//
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struct Pool_t
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{
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};
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//
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// Allocates memory from the kernel heap
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//
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void *kmalloc(size_t req, uint flags);
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void *kmemalign(size_t req, uint align, uint flags);
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#endif
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