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Rev 3844 Rev 4086
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#include <arch/types.h>
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#include <arch/types.h>
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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 INDEV_BUFLEN  512
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struct chardev;
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struct indev;
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/* Character device operations interface. */
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/* Input character device operations interface. */
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typedef struct {
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typedef struct {
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    /** Suspend pushing characters. */
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    void (* suspend)(struct chardev *);
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    /** Resume pushing characters. */
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    void (* resume)(struct chardev *);
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    /** Write character to stream. */
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    void (* write)(struct chardev *, char c, bool silent);
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    /** Read character directly from device, assume interrupts disabled. */
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    /** Read character directly from device, assume interrupts disabled. */
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    char (* read)(struct chardev *);
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    char (* poll)(struct indev *);
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} chardev_operations_t;
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} indev_operations_t;
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/** Character input device. */
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/** Character input device. */
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typedef struct chardev {
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typedef struct indev {
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    char *name;
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    char *name;
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    waitq_t wq;
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    waitq_t wq;
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    /** Protects everything below. */
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    /** Protects everything below. */
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    SPINLOCK_DECLARE(lock);
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    SPINLOCK_DECLARE(lock);
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    uint8_t buffer[CHARDEV_BUFLEN];
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    uint8_t buffer[INDEV_BUFLEN];
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    count_t counter;
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    count_t counter;
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    /** Implementation of chardev operations. */
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    /** Implementation of indev operations. */
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    chardev_operations_t *op;
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    indev_operations_t *op;
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    index_t index;
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    index_t index;
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    void *data;
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    void *data;
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} indev_t;
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struct outdev;
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/* Output character device operations interface. */
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typedef struct {
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    /** Write character to output. */
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    void (* write)(struct outdev *, char c, bool silent);
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} outdev_operations_t;
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/** Character input device. */
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typedef struct outdev {
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    char *name;
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    /** Protects everything below. */
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    SPINLOCK_DECLARE(lock);
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    /** Implementation of outdev operations. */
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    outdev_operations_t *op;
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    void *data;
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} chardev_t;
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} outdev_t;
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extern void indev_initialize(char *name, indev_t *indev,
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    indev_operations_t *op);
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extern void indev_push_character(indev_t *indev, uint8_t ch);
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extern void chardev_initialize(char *name, chardev_t *chardev,
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extern void outdev_initialize(char *name, outdev_t *outdev,
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    chardev_operations_t *op);
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    outdev_operations_t *op);
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extern void chardev_push_character(chardev_t *chardev, uint8_t ch);
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#endif /* KERN_CHARDEV_H_ */
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#endif /* KERN_CHARDEV_H_ */
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/** @}
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/** @}
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 */
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 */