Subversion Repositories igor

#ifndef _REQ_H_

#define _REQ_H_

#include <stdint.h>

#include "device.h"

/* Will make callback on this function with idev->priv as arg. */

typedef void req_fn_t(void *);

struct req {

        struct igordev *dev; /* What device we wish to communicate with. */

        uint8_t type;        /* What operation do we wish to perform. */

/* Request types. */

#define REQ_TYPE_READ   1

#define REQ_TYPE_WRITE  2

#define REQ_TYPE_FUNC   3

#define REQ_TYPE_FLUSH  4

        uint8_t flags;       /* Flags for request. */

/* Request flags. */

#define REQ_CALLBACK    0x01

        uint32_t devnum;     /* What device we are performing the request on. */

        req_fn_t *func;      /* Perform the running of this function. */

};

#define MAXREQ 64

struct rqueue {

        struct req queue[MAXREQ];

        uint8_t off_read;

        uint8_t off_write;

        uint8_t rcount;

        uint8_t wcount;

        int8_t status;

/* Status codes. **/

#define RQUEUE_STATUS_FULL      0x1

#define RQUEUE_STATUS_EMPTY     0x2

};

#define RQUEUE_FULL(rq) ((rq)->status & RQUEUE_STATUS_FULL)

#define RQUEUE_EMPTY(rq) ((rq)->status & RQUEUE_STATUS_EMPTY)

void             rqueue_init(struct rqueue *);

uint8_t          rqueue_used(struct rqueue *);

uint8_t          rqueue_unused(struct rqueue *);

struct req      *req_peak(struct rqueue *);

int8_t           req_alloc(struct rqueue *, struct igordev *, uint8_t, uint8_t,

                    uint32_t, req_fn_t *);

int8_t           req_free(struct rqueue *);

#endif /* !_REQ_H_ */