| 39,41 → 39,60 |
|---|
| #include <synch/waitq.h> |
| #include <synch/spinlock.h> |
| |
| #define CHARDEV_BUFLEN 512 |
| #define INDEV_BUFLEN 512 |
| |
| struct chardev; |
| struct indev; |
| |
| /* Character device operations interface. */ |
| /* Input character device operations interface. */ |
| typedef struct { |
| /** Suspend pushing characters. */ |
| void (* suspend)(struct chardev *); |
| /** Resume pushing characters. */ |
| void (* resume)(struct chardev *); |
| /** Write character to stream. */ |
| void (* write)(struct chardev *, char c, bool silent); |
| /** Read character directly from device, assume interrupts disabled. */ |
| char (* read)(struct chardev *); |
| } chardev_operations_t; |
| char (* poll)(struct indev *); |
| } indev_operations_t; |
| |
| /** Character input device. */ |
| typedef struct chardev { |
| typedef struct indev { |
| char *name; |
| waitq_t wq; |
| |
| waitq_t wq; |
| /** Protects everything below. */ |
| SPINLOCK_DECLARE(lock); |
| uint8_t buffer[CHARDEV_BUFLEN]; |
| SPINLOCK_DECLARE(lock); |
| uint8_t buffer[INDEV_BUFLEN]; |
| count_t counter; |
| /** Implementation of chardev operations. */ |
| chardev_operations_t *op; |
| |
| /** Implementation of indev operations. */ |
| indev_operations_t *op; |
| index_t index; |
| void *data; |
| } chardev_t; |
| } indev_t; |
| |
| extern void chardev_initialize(char *name, chardev_t *chardev, |
| chardev_operations_t *op); |
| extern void chardev_push_character(chardev_t *chardev, uint8_t ch); |
| |
| struct outdev; |
| |
| /* Output character device operations interface. */ |
| typedef struct { |
| /** Write character to output. */ |
| void (* write)(struct outdev *, char c, bool silent); |
| } outdev_operations_t; |
| |
| /** Character input device. */ |
| typedef struct outdev { |
| char *name; |
| |
| /** Protects everything below. */ |
| SPINLOCK_DECLARE(lock); |
| |
| /** Implementation of outdev operations. */ |
| outdev_operations_t *op; |
| void *data; |
| } outdev_t; |
| |
| extern void indev_initialize(char *name, indev_t *indev, |
| indev_operations_t *op); |
| extern void indev_push_character(indev_t *indev, uint8_t ch); |
| |
| extern void outdev_initialize(char *name, outdev_t *outdev, |
| outdev_operations_t *op); |
| |
| #endif /* KERN_CHARDEV_H_ */ |
| |
| /** @} |