Subversion Repositories HelenOS-historic

Rev

Rev 552 | Rev 588 | Go to most recent revision | Show entire file | Regard 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 */