dmmlib/LeaHeader.h

#ifndef RA_LEAHEADER_H
#define RA_LEAHEADER_H

struct LeaHeader {
	unsigned int size;
	unsigned int prevSize;
};

typedef struct LeaHeader  leaHdr;
typedef struct LeaHeader* leaHdr_ptr;

//const unsigned int HDR_SIZE = sizeof(leaHdr);
#define HDR_SIZE sizeof(leaHdr)


//returns a pointer to the header of the block	
leaHdr * getHeader(const char * ptr);


unsigned int getSize (const char * ptr);


unsigned int getPrevSize (const char * ptr);


void setSize (char * ptr, const unsigned int sz);


void setPrevSize (char * ptr, const unsigned int sz);


//returns a pointer (that points) to the next block
char * getNext (const char * ptr);


char * getPrev(const char * ptr);

void markPrevFree (char * ptr);

void markPrevInUse (char * ptr);

unsigned int isPrevFree (char * ptr);


void markInUse (char * ptr);


void markFree (char * ptr);
	

unsigned int isFree (char * ptr);

#endif /*RA_LEAHEADER_H*/