mimem.c File Reference

Memory Buffer handling for MiWi Protocol implementation.

Copyright (c) 2018 - 2019 Microchip Technology Inc. and its subsidiaries.

#include <string.h>
#include "compiler.h"
#include "mimem.h"

Data Structures
struct	_Block_t

Macros
#define	ALIGN(X)   ((((X-1) >> ALIGNMENT_FACTOR) << ALIGNMENT_FACTOR) + BYTE_ALIGNMENT)
#define	ALIGNMENT_FACTOR   2U
#define	BYTE_ALIGNMENT   4U
#define	HEAP_MINIMUM_BLOCK_SIZE   (( size_t )( blockMetaDataSize + 4U))
#define	HEAP_SIZE   (6144UL)

Typedefs
typedef struct _Block_t	Block_t

Functions
void *	MiMem_Alloc (uint8_t size)
void	MiMem_Free (void *ptr)
void	MiMem_Init (void)
uint8_t	MiMem_PercentageOfFreeBuffers (void)
static void	splitBlock (Block_t *blockTobeSplitted, size_t size)

Variables
static Block_t *	base = NULL
static const size_t	blockMetaDataSize = ALIGN(sizeof(Block_t))
static uint8_t	heapMem [HEAP_SIZE]
static size_t	totalFreeBytesRemaining

#define ALIGN

(

X

)

((((X-1) >> ALIGNMENT_FACTOR) << ALIGNMENT_FACTOR) + BYTE_ALIGNMENT)

Referenced by MiMem_Alloc(), and MiMem_Init().

#define ALIGNMENT_FACTOR   2U

#define BYTE_ALIGNMENT   4U

#define HEAP_MINIMUM_BLOCK_SIZE   (( size_t )( blockMetaDataSize + 4U))

Referenced by MiMem_Alloc().

#define HEAP_SIZE   (6144UL)

Referenced by MiMem_Init(), and MiMem_PercentageOfFreeBuffers().

typedef struct _Block_t Block_t

void* MiMem_Alloc

(

uint8_t

size

)

References ALIGN, base, blockMetaDataSize, _Block_t::free, HEAP_MINIMUM_BLOCK_SIZE, MiMem_Init(), _Block_t::next, NULL, _Block_t::size, splitBlock(), and totalFreeBytesRemaining.

Referenced by appAckWaitDataCallback(), frameParse(), frameTransmit(), macAckOnlyDataCallback(), MiApp_BroadcastConnectionTable(), MiApp_SendData(), otauDataInd(), PHY_DataReq(), removeConnection(), and sendConnectionRequest().

void MiMem_Free

(

void *

ptr

)

References base, blockMetaDataSize, _Block_t::free, _Block_t::next, NULL, _Block_t::prev, _Block_t::size, and totalFreeBytesRemaining.

Referenced by appAckWaitDataCallback(), CommandConfCallback(), connectionRespConfCallback(), connReqConfCallback(), dataConfcb(), dataTimerHandler(), frameParse(), frameTxCallback(), macAckOnlyDataCallback(), miQueueFlush(), otauTask(), PHY_TxHandler(), protocolTimerHandler(), and sendConnectionRequest().

void MiMem_Init

(

void

)

References ALIGN, _Block_t::free, HEAP_SIZE, heapMem, _Block_t::next, NULL, _Block_t::prev, _Block_t::size, and totalFreeBytesRemaining.

Referenced by MiMem_Alloc().

uint8_t MiMem_PercentageOfFreeBuffers

(

void

)

References HEAP_SIZE, and totalFreeBytesRemaining.

Referenced by frameParse(), and MiApp_SendData().

static void splitBlock ( Block_t *  blockTobeSplitted, size_t  size  )

static

References _Block_t::free, _Block_t::next, _Block_t::prev, and _Block_t::size.

Referenced by MiMem_Alloc().

Block_t* base = NULL

static

Referenced by MiMem_Alloc(), and MiMem_Free().

const size_t blockMetaDataSize = ALIGN(sizeof(Block_t))

static

Referenced by MiMem_Alloc(), and MiMem_Free().

uint8_t heapMem[HEAP_SIZE]

static

Referenced by MiMem_Init().

size_t totalFreeBytesRemaining

static

Referenced by MiMem_Alloc(), MiMem_Free(), MiMem_Init(), and MiMem_PercentageOfFreeBuffers().