Subversion Repositories HelenOS-historic

Rev

Rev 552 | Rev 588 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 552 Rev 575
Line 34... Line 34...
34 
/** Initialize character device.
 34 
/** Initialize character device.
35 
 *
 35 
 *
36 
 * @param chardev Character device.
 36 
 * @param chardev Character device.
37 
 * @param op Implementation of character device operations.
 37 
 * @param op Implementation of character device operations.
38 
 */
 38 
 */
39 
void chardev_initialize(chardev_t *chardev, chardev_operations_t *op)
 39 
void chardev_initialize(char *name,chardev_t *chardev,
- 
 
 40 
            chardev_operations_t *op)
40 
{
 41 
{
- 
 
 42 
    chardev->name = name;
- 
 
 43 
 
41 
    waitq_initialize(&chardev->wq);
 44 
    waitq_initialize(&chardev->wq);
42 
    spinlock_initialize(&chardev->lock, "chardev");
 45 
    spinlock_initialize(&chardev->lock, "chardev");
43 
    chardev->counter = 0;
 46 
    chardev->counter = 0;
44 
    chardev->index = 0;
 47 
    chardev->index = 0;
45 
    chardev->op = op;
 48 
    chardev->op = op;
Line 54... Line 57...
54 
{
 57 
{
55 
        spinlock_lock(&chardev->lock);
 58 
        spinlock_lock(&chardev->lock);
56 
    chardev->counter++;
 59 
    chardev->counter++;
57 
    if (chardev->counter == CHARDEV_BUFLEN - 1) {
 60 
    if (chardev->counter == CHARDEV_BUFLEN - 1) {
58 
        /* buffer full => disable device interrupt */
 61 
        /* buffer full => disable device interrupt */
59 
        chardev->op->suspend();
 62 
        chardev->op->suspend(chardev);
60 
    }
 63 
    }
61 
 
 64 
 
62 
    putchar(ch);
 65 
    putchar(ch);
63 
        chardev->buffer[chardev->index++] = ch;
 66 
        chardev->buffer[chardev->index++] = ch;
64 
        chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */
 67 
        chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */