// ********HEAP.H**********************

// Fixed Block Size Memory Manager 

// Last modified 1/16/03 by Jonathan W. Valvano

 

// Copyright 2003 by Jonathan W. Valvano, valvano@uts.cc.utexas.edu 

//    You may use, edit, run or distribute this file 

//    as long as the above copyright notice remains 



#define BLOCKSIZE 2      

// Number of 16-bit words in each block 



#define NUMBLOCKS 3      

// Number of memory blocks 



#define null 0           

// empty pointer value 



// initialize the Heap

// Call this once at the beginning

void Heap_Init(void);



// Returns a pointer to a memory block of "BlockSize" integers 

// The returned pointer will be null (0) if the Heap is empty 

unsigned short *Heap_Allocate(void);



// Releases the memory block of "BlockSize" integers pointed to by "pt"

// No protection, we assume "pt" points to a previously allocated block 

void Heap_Release(unsigned short *pt);