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#ifndef _REQ_H_

#define _REQ_H_

#include <stdint.h>

#include "device.h"

/* Type which will be called with the devices idata->priv as argument. */

/* XXX: We can allow an extra arg parameter to struct and req_make if needed. */

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. */

        uint8_t flags;       /* Flags for request. */

        uint8_t taken;       /* Internal allocation flags. */

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

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

};

/* Request types. */

#define REQ_TYPE_READ   1

#define REQ_TYPE_WRITE  2

#define REQ_TYPE_FUNC   3

#define REQ_TYPE_FLUSH  4

/* Request flags. */

#define REQ_CALLBACK    0x01

/* Max number of requests. Regulates queue length and request pool size. */

#define MAXREQ 64

volatile struct req *req_alloc(void);

void        req_free(volatile struct req *);

void        req_init(void);

volatile struct req *req_make(struct igordev *, uint8_t, uint8_t, uint32_t, req_fn_t *);

#endif /* !_REQ_H_ */