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efi_loader: implement queueing of the notification function

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For the correct implementation of the task priority level (TPL)
calling the notification function must be queued.

Add a status field 'queued' to events.

In function efi_signal_event set status queued if a notification
function exists and reset it after we have called the function.
A later patch will add a check of the TPL here.

In efi_create_event and efi_close_event unset the queued status.

In function efi_wait_for_event and efi_check_event
queue the notification function.

In efi_timer_check call the efi_notify_event
if the status queued is set.
For all timer events set status signaled.

In efi_console_timer_notify set the signaled state of the
WaitForKey event.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2017-09-15 10:06:13 +02:00 • committed by Alexander Graf
parent 38b1b79021
commit ca62a4f53e
3 changed files with 36 additions and 12 deletions
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4
lib/efi_loader/efi_console.c
View file

@ -426,8 +426,10 @@ static void EFIAPI efi_console_timer_notify(struct efi_event *event,
void *context)
{
EFI_ENTRY("%p, %p", event, context);
if (tstc())
if (tstc()) {
efi_con_in.wait_for_key->signaled = 1;
efi_signal_event(efi_con_in.wait_for_key);
}
EFI_EXIT(EFI_SUCCESS);
}