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https://git.rwth-aachen.de/acs/public/villas/node/
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94 lines
No EOL
2.5 KiB
C
94 lines
No EOL
2.5 KiB
C
/** Memory allocators.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program 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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* 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, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <stddef.h>
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#include <stdint.h>
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#pragma once
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#define HUGEPAGESIZE (1 << 21)
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struct memtype;
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typedef void *(*memzone_allocator_t)(struct memtype *mem, size_t len, size_t alignment);
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typedef int (*memzone_deallocator_t)(struct memtype *mem, void *ptr, size_t len);
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enum memtype_flags {
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MEMORY_MMAP = (1 << 0),
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MEMORY_DMA = (1 << 1),
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MEMORY_HUGEPAGE = (1 << 2),
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MEMORY_HEAP = (1 << 3)
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};
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struct memtype {
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const char *name;
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int flags;
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size_t alignment;
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memzone_allocator_t alloc;
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memzone_deallocator_t free;
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void *_vd; /**<Virtual data for possible state */
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};
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enum memblock_flags {
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MEMBLOCK_USED = 1,
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};
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/** Descriptor of a memory block. Associated block always starts at
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* &m + sizeof(struct memblock). */
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struct memblock {
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struct memblock* prev;
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struct memblock* next;
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size_t len; /**<Length of the block; doesn't include the descriptor itself */
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int flags;
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};
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/** @todo Unused for now */
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struct memzone {
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struct memtype * const type;
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void *addr;
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uintptr_t physaddr;
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size_t len;
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};
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/** Initilialize memory subsystem */
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int memory_init(int hugepages);
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/** Allocate \p len bytes memory of type \p m.
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*
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* @retval NULL If allocation failed.
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* @retval <>0 If allocation was successful.
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*/
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void * memory_alloc(struct memtype *m, size_t len);
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void * memory_alloc_aligned(struct memtype *m, size_t len, size_t alignment);
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int memory_free(struct memtype *m, void *ptr, size_t len);
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struct memtype * memtype_managed_init(void *ptr, size_t len);
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extern struct memtype memtype_heap;
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extern struct memtype memtype_hugepage; |