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#include <synch/waitq.h>
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#include <synch/waitq.h>
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#include <synch/spinlock.h>
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#include <synch/spinlock.h>
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#define CHARDEV_BUFLEN 512
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#define CHARDEV_BUFLEN 512
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struct chardev;
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/* Character device operations interface. */
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/* Character device operations interface. */
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struct chardev_operations {
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struct chardev_operations {
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    void (* suspend)(void);     /**< Suspend pushing characters. */
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    void (* suspend)(struct chardev *);/**< Suspend pushing characters. */
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    void (* resume)(void);      /**< Resume pushing characters. */
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    void (* resume)(struct chardev *); /**< Resume pushing characters. */
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    /** Write character to stream */
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    void (* write)(struct chardev *, char c);
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};
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};
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typedef struct chardev_operations chardev_operations_t;
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typedef struct chardev_operations chardev_operations_t;
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/** Character input device. */
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/** Character input device. */
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struct chardev {
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struct chardev {
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    char *name;
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    waitq_t wq;
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    waitq_t wq;
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    spinlock_t lock;        /**< Protects everything below. */
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    spinlock_t lock;        /**< Protects everything below. */
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    __u8 buffer[CHARDEV_BUFLEN];
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    __u8 buffer[CHARDEV_BUFLEN];
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    count_t counter;
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    count_t counter;
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    index_t index;
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    chardev_operations_t *op;   /**< Implementation of chardev operations. */
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    chardev_operations_t *op;   /**< Implementation of chardev operations. */
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    index_t index;
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    void *data;
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};
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};
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extern void chardev_initialize(chardev_t *chardev, chardev_operations_t *op);
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extern void chardev_initialize(char *name,
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                   chardev_t *chardev,
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                   chardev_operations_t *op);
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void chardev_push_character(chardev_t *chardev, __u8 ch);
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void chardev_push_character(chardev_t *chardev, __u8 ch);
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#endif /* __CHARDEV_H__ */
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#endif /* __CHARDEV_H__ */