cppi_heap.h File Reference

Header file for the linked list library. More...

Functions

void cppi_internal_heap_cache_begin (Cppi_HeapDesc *desc)
void * cppi_internal_heap_malloc (Cppi_HeapDesc *desc, uint32_t size)
void cppi_internal_heap_free (Cppi_HeapDesc *desc, void *ptr)
void cppi_internal_heap_release (Cppi_HeapDesc *desc)
void cppi_internal_heap_add (Cppi_HeapDesc *desc, void *heap, uint32_t heapSize)

Detailed Description

Header file for the linked list library.

NOTE: (C) Copyright 2012 Texas Instruments, Inc.

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Function Documentation

void cppi_internal_heap_add ( Cppi_HeapDesc *  desc,
void *  heap,
uint32_t  heapSize 
)

Description
This function adds a new block to the internal heap.

The new chunk of memory is aligned to desc->alignPow2, which must be large enough so no partial cache lines will be on either side of the block.

Cache assumptions: Caller manages cache for desc. This can be done by calling cppi_internal_heap_cache_begin () BEFORE any items from the heap get dirtied.

Callee writes back any changes.

Function is called inside a semaphore protecting heap from multicore

Qmss_getQosSchedStats*

Parameters:
[in] desc Heap descriptor which includes free list and size parameters
[in] heap Pre-allocated heap. If NULL, will allocate a new block of heapSize from Cppi_osalMalloc(). This is normally used with a static heap else NULL.
[in] heapSize Size of heap, or size to allocate from Cppi_osalMalloc().
Return values:
Not Applicable
void cppi_internal_heap_cache_begin ( Cppi_HeapDesc *  desc  ) 

Description
Prepares the cache before accessing heap. This must be called before anything in the heap is dirtied, thus it will usually be called at the beginning of a function that may use the heap functions.

Cache assumptions: Invalidates desc Invalidates head of blockFreeList Invalidates head of allocatedBlockList

Parameters:
[in] desc Heap descriptor which includes free list and size parameters
void cppi_internal_heap_free ( Cppi_HeapDesc *  desc,
void *  ptr 
)

Description
This function returns ptr to internal heap free list. It will never return memory through Cppi_osalFree. Memory is only returned on cppi_exit().

Cache assumptions: Caller manages cache for desc. This can be done by calling cppi_internal_heap_cache_begin () BEFORE any items from the heap get dirtied.

Callee writes back any changes.

Function is called inside a semaphore protecting heap from multicore

Parameters:
[in] desc Heap descriptor which includes free list and size parameters
[in] ptr Previously allocated pointer
Return values:
Not Applicable
void* cppi_internal_heap_malloc ( Cppi_HeapDesc *  desc,
uint32_t  size 
)

Description
This function allocates from internal heap if available. If not available, allocates using Cppi_osalMalloc. If Cppi_osalMalloc fails, or the size is > CPPI_BLOCK_CHUNK_SIZE, then this function CAN return NULL.

Cache assumptions: Caller manages cache for desc. This can be done by calling cppi_internal_heap_cache_begin () BEFORE any items from the heap get dirtied.

Callee writes back any changes.

Function is called inside a semaphore protecting heap from multicore

Parameters:
[in] desc Heap descriptor which includes free list and size parameters
[in] size Allocated size.
Return values:
New pointer or NULL on error.
void cppi_internal_heap_release ( Cppi_HeapDesc *  desc  ) 

Description
This function returns all memory allocated from Cppi_osalMalloc. It should only used as part of cppi_exit().

Cache assumptions: Caller manages cache for desc

Callee manages cache for allocatedBlockList

Nothing from internal heap is dirty (caller wrote back dirty lines)

Function is called inside a semaphore protecting heap from multicore

Parameters:
[in] desc Heap descriptor which includes free list and size parameters
Return values:
Not Applicable

Copyright 2012, Texas Instruments Incorporated