Contents

getFirstElementIndex

Declaration

virtual IOReturn getFirstElementIndex(uint64_t channel_id, int *element_index);

Parameters

  • channel_id:

    • ID of the channel

  • element_index:

    • pointer to the returned element_index

Return Value

Appropriate IOReturn code

Discussion

Returns the first element index for a channel

For efficiently and thread-safely reading _elements

Locking: Caller must ensure that the reporter (data) lock is held.