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/*

 *

 *   Fifo for saving interrupt information, header

 *

 *   Lasse Lehtonen

 *

 */

#ifndef HPD_ISR_FIFO_HH

#define HPD_ISR_FIFO_HH

// Tells what caused N2H2 to interrupt

typedef enum {RX_READY, RX_UNKNOWN, TX_IGNORED} Hpd_isr_type;

// Item stored in fifo

typedef struct Hpd_isr_info Hpd_isr_info;

typedef struct Hpd_isr_info

{

  Hpd_isr_type isr_type;

  union {

    int  rx_channel;

    int  dst_address;

  };

  Hpd_isr_info* next;

};

typedef struct

{

  Hpd_isr_info*   root;

  volatile int    size;

} Hpd_isr_fifo;

//                             used fifo           item to store

void          hpd_isr_fifo_push(Hpd_isr_fifo* fifo, Hpd_isr_info* item);

Hpd_isr_info* hpd_isr_fifo_pop(Hpd_isr_fifo* fifo);

int           hpd_isr_fifo_size(Hpd_isr_fifo* fifo);

// Creates new fifo

Hpd_isr_fifo* hpd_isr_fifo_create();

#endif