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/*
*
* (C) COPYRIGHT 2014, 2017 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
* SPDX-License-Identifier: GPL-2.0
*
*/
#ifndef _KERNEL_UTF_MEM_H_
#define _KERNEL_UTF_MEM_H_
/* kutf_mem.h
* Functions for management of memory pools in the kernel.
*
* This module implements a memory pool allocator, allowing a test
* implementation to allocate linked allocations which can then be freed by a
* single free which releases all of the resources held by the entire pool.
*
* Note that it is not possible to free single resources within the pool once
* allocated.
*/
#include <linux/list.h>
#include <linux/mutex.h>
/**
* struct kutf_mempool - the memory pool context management structure
* @head: list head on which the allocations in this context are added to
* @lock: mutex for concurrent allocation from multiple threads
*
*/
struct kutf_mempool {
struct list_head head;
struct mutex lock;
};
/**
* kutf_mempool_init() - Initialize a memory pool.
* @pool: Memory pool structure to initialize, provided by the user
*
* Return: zero on success
*/
int kutf_mempool_init(struct kutf_mempool *pool);
/**
* kutf_mempool_alloc() - Allocate memory from a pool
* @pool: Memory pool to allocate from
* @size: Size of memory wanted in number of bytes
*
* Return: Pointer to memory on success, NULL on failure.
*/
void *kutf_mempool_alloc(struct kutf_mempool *pool, size_t size);
/**
* kutf_mempool_destroy() - Destroy a memory pool, freeing all memory within it.
* @pool: The memory pool to free
*/
void kutf_mempool_destroy(struct kutf_mempool *pool);
#endif /* _KERNEL_UTF_MEM_H_ */
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