/**************************************************************************************************
 
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**************************************************************************************************/

/**************************************************************************************************
  Filename:       OSAL_Memory.h
  Revised:         
  Revision:        
    
  Description:    This module defines the OSAL memory control functions. 
    
            
   
**************************************************************************************************/

#ifndef OSAL_MEMORY_H
#define OSAL_MEMORY_H

#ifdef __cplusplus
extern "C"
{
#endif

/*********************************************************************
 * INCLUDES
 */
#include "comdef.h"
 
/*********************************************************************
 * CONSTANTS
 */

#if !defined ( OSALMEM_METRICS )
  #define OSALMEM_METRICS  FALSE
#endif

/*********************************************************************
 * MACROS
 */
  
//#define osal_stack_used()  OnBoard_stack_used()

/*********************************************************************
 * TYPEDEFS
 */

typedef struct {
  // The 15 LSB's of 'val' indicate the total item size, including the header, in 8-bit bytes.
  unsigned short len : 15;   // unsigned short len : 15;
  // The 1 MSB of 'val' is used as a boolean to indicate in-use or freed.
  unsigned short inUse : 1;  // unsigned short inUse : 1;
} osalMemHdrHdr_t;

typedef union {
  /* Dummy variable so compiler forces structure to alignment of largest element while not wasting
   * space on targets when the halDataAlign_t is smaller than a UINT16.
   */
  halDataAlign_t alignDummy;
  uint32 val;            // uint16    // TODO: maybe due to 4 byte alignment requirement in M0, this union should be 4 byte, change from uint16 to uint32, investigate more later -  04-25
  osalMemHdrHdr_t hdr;
} osalMemHdr_t;

/*********************************************************************
 * GLOBAL VARIABLES
 */
 
/*********************************************************************
 * FUNCTIONS
 */

 /*
  * Initialize memory manager.
  */
  void osal_mem_init( void );

 /*
  * Setup efficient search for the first free block of heap.
  */
  void osal_mem_kick( void );

 /*
  * Allocate a block of memory.
  */
  void *osal_mem_alloc( uint16 size );

 /*
  * Free a block of memory.
  */
  void osal_mem_free( void *ptr );
  
  
//  ====== A2 metal change add
 /*
  * Set osal memory buffer
  */
  void osal_mem_set_heap(osalMemHdr_t *hdr, uint32 size);  

#if ( OSALMEM_METRICS )
 /*
  * Return the maximum number of blocks ever allocated at once.
  */
  uint16 osal_heap_block_max( void );

 /*
  * Return the current number of blocks now allocated.
  */
  uint16 osal_heap_block_cnt( void );

 /*
  * Return the current number of free blocks.
  */
  uint16 osal_heap_block_free( void );

 /*
  * Return the current number of bytes allocated.
  */
  uint16 osal_heap_mem_used( void );
#endif


/*********************************************************************
*********************************************************************/

#ifdef __cplusplus
}
#endif

#endif /* #ifndef OSAL_MEMORY_H */