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/*
* heap.h
*
* Heap module manages fixed size buffers that can be used
* in a multiprocessor system with shared memory.
*
* Copyright (C) 2008-2009 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/
#ifndef _HEAP_H_
#define _HEAP_H_
#include <linux/types.h>
/*
* Structure defining memory related statistics
*/
struct memory_stats{
u32 total_size; /* Total memory size */
u32 total_free_size; /* Total free memory size */
u32 largest_free_size; /* Largest free memory size */
};
/*!
* ======== extendedstats ========
* Stats structure for the get_extended_stats API.
*
* max_allocated_blocks: The maximum number of blocks allocated
* from this heap at any single point in time during the lifetime of this
* heap instance.
*
* num_allocated_blocks: The total number of blocks currently
* allocated in this Heap instance.
*/
struct heap_extended_stats {
u32 max_allocated_blocks;
u32 num_allocated_blocks;
};
/*
* Structure defining config parameters for the heapbuf module
*/
struct heap_config {
u32 max_name_len; /* Maximum length of name */
bool track_max_allocs; /* Track the max number of allocated blocks */
};
/*
* Structure for the handle for the heap
*/
struct heap_object {
void* (*alloc) (void *handle, u32 size, u32 align);
int (*free) (void *handle, void *block, u32 size);
void (*get_stats) (void *handle, struct memory_stats *stats);
void (*get_extended_stats) (void *handle,
struct heap_extended_stats *stats);
bool (*is_blocking) (void *handle);
void *obj;
};
/*
* Allocate a block
*/
void *sl_heap_alloc(void *handle, u32 size, u32 align);
/*
* Frees the block to this Heap
*/
int sl_heap_free(void *handle, void *block, u32 size);
/*
* Get heap statistics
*/
void sl_heap_get_stats(void *handle, struct memory_stats *stats);
/*
* Get heap extended statistics
*/
void sl_heap_get_extended_stats(void *hphandle,
struct heap_extended_stats *stats);
/*
* Indicates whether a heap will block on free or alloc
*/
bool sl_heap_is_blocking(void *hphandle);
#endif /* _HEAP_H_ */
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