Docs » Autodocs » card.resource » ReleaseCard
ReleaseCard -- Release ownership of credit card
ReleaseCard( handle, flags )
void ReleaseCard( struct CardHandle *, ULONG );
This function releases ownership of the credit card in the
The access light (if any) is automatically turned off
(if it was turned on) when you release ownership of
a card you owned, and all credit-card control registers
are reset to their default state.
You must call this function if -
You own the credit-card, and want to release it so that
other devices on the notification list will have a chance
to examine the credit-card in the card slot.
You took a Card Removed interrupt while you owned the
credit-card. If so, you MUST call this function, else
no other task will be notified of newly inserted cards. On
some machines the credit-card interface hardware may also
be left disabled until you respond to the card removed interrupt
by calling this function.
You want to remove yourself from the notification list (see
optional flags below).
handle - Same handle as that used when OwnCard() was called.
flags - Optional flags.
- CARDB_REMOVEHANDLE means you want remove your
CardHandle structure from the notification list
whether or not you currently own the credit-card
in the card slot. The node structure in your
CardHandle will be removed from the notification
list, and ownership will be released if you were
the owner of the card.
This function should only be called from a task.OwnCard(), "resources/card.i", <resources/card.h>