| 27,15 → 27,41 |
|---|
| */ |
| |
| #include <console/chardev.h> |
| #include <putchar.h> |
| #include <synch/waitq.h> |
| #include <synch/spinlock.h> |
| |
| /** Initialize character device. */ |
| void chardev_initialize(chardev_t *chardev, ready_func_t r) |
| /** Initialize character device. |
| * |
| * @param chardev Character device. |
| * @param op Implementation of character device operations. |
| */ |
| void chardev_initialize(chardev_t *chardev, chardev_operations_t *op) |
| { |
| waitq_initialize(&chardev->wq); |
| spinlock_initialize(&chardev->lock); |
| chardev->counter = 0; |
| chardev->index = 0; |
| chardev->ready_func = r; |
| chardev->op = op; |
| } |
| |
| /** Push character read from input character device. |
| * |
| * @param chardev Character device. |
| * @param ch Character being pushed. |
| */ |
| void chardev_push_character(chardev_t *chardev, __u8 ch) |
| { |
| spinlock_lock(&chardev->lock); |
| chardev->counter++; |
| if (chardev->counter == CHARDEV_BUFLEN - 1) { |
| /* buffer full => disable device interrupt */ |
| chardev->op->suspend(); |
| } |
| |
| putchar(ch); |
| chardev->buffer[chardev->index++] = ch; |
| chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */ |
| waitq_wakeup(&chardev->wq, WAKEUP_FIRST); |
| spinlock_unlock(&chardev->lock); |
| } |