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Line 53... Line 53...
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 * @param chardev Character device.
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 * @param chardev Character device.
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 * @param ch Character being pushed.
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 * @param ch Character being pushed.
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 */
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 */
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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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{
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{
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        spinlock_lock(&chardev->lock);
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    spinlock_lock(&chardev->lock);
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    chardev->counter++;
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    chardev->counter++;
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    if (chardev->counter == CHARDEV_BUFLEN - 1) {
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    if (chardev->counter == CHARDEV_BUFLEN - 1) {
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        /* buffer full => disable device interrupt */
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        /* buffer full => disable device interrupt */
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        chardev->op->suspend(chardev);
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        chardev->op->suspend(chardev);
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    }
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    }
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        chardev->buffer[chardev->index++] = ch;
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    chardev->buffer[chardev->index++] = ch;
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        chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */
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    chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */
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        waitq_wakeup(&chardev->wq, WAKEUP_FIRST);
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    waitq_wakeup(&chardev->wq, WAKEUP_FIRST);
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        spinlock_unlock(&chardev->lock);
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    spinlock_unlock(&chardev->lock);
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}
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}