/*****************************************************************************
			
			fifo.h
		   fifo data structure
			
******************************************************************************/ 


#define 	FIFO_SIZE	50
#define 	N_FIFOS		10	
#define 	ALLOCATED	1
#define 	ERR_FIFOEMPTY	-1
#define 	ERR_FIFOFULL	-2

typedef struct fifo *fifoptr;

typedef struct fifo{ 	int state ;
			int fifo_size;
			int read_idx;
			int write_idx;
			sema_t  fullsem;
			sema_t emptysem;
                	mutex_t fifomut;
	              	bufptr bufs[FIFO_SIZE];
			} fifo_t;

typedef struct fifotable *fifotabptr;

typedef struct fifotable{ 	int state ;
				int curridx;
				fifoptr fifos[N_FIFOS];
			} fifotab_t;