Sync/gnu-efi/lib/event.c
Curle d588e232c4 Major overhaul of this branch.
This branch has been dedicated to purely the UEFI bootloader.
As such, all other code has been removed.

This code can be compiled with Visual Studio, gcc or llvm.
2019-07-17 21:10:29 +01:00

155 lines
3.2 KiB
C

/*++
Copyright (c) 1998 Intel Corporation
Module Name:
event.c
Abstract:
Revision History
--*/
#include "lib.h"
EFI_EVENT
LibCreateProtocolNotifyEvent (
IN EFI_GUID *ProtocolGuid,
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction,
IN VOID *NotifyContext,
OUT VOID *Registration
)
{
EFI_STATUS Status;
EFI_EVENT Event;
//
// Create the event
//
Status = uefi_call_wrapper(
BS->CreateEvent,
5,
EVT_NOTIFY_SIGNAL,
NotifyTpl,
NotifyFunction,
NotifyContext,
&Event
);
if ( EFI_ERROR( Status ) ) return NULL ;
ASSERT (!EFI_ERROR(Status));
//
// Register for protocol notifactions on this event
//
Status = uefi_call_wrapper(
BS->RegisterProtocolNotify,
3,
ProtocolGuid,
Event,
Registration
);
if ( EFI_ERROR( Status ) ) return NULL ;
ASSERT (!EFI_ERROR(Status));
//
// Kick the event so we will perform an initial pass of
// current installed drivers
//
uefi_call_wrapper(BS->SignalEvent, 1, Event);
return Event;
}
EFI_STATUS
WaitForSingleEvent (
IN EFI_EVENT Event,
IN UINT64 Timeout OPTIONAL
)
{
EFI_STATUS Status;
UINTN Index;
EFI_EVENT TimerEvent;
EFI_EVENT WaitList[2];
if (Timeout) {
//
// Create a timer event
//
Status = uefi_call_wrapper(BS->CreateEvent, 5, EVT_TIMER, 0, NULL, NULL, &TimerEvent);
if (!EFI_ERROR(Status)) {
//
// Set the timer event
//
uefi_call_wrapper(BS->SetTimer, 3, TimerEvent, TimerRelative, Timeout);
//
// Wait for the original event or the timer
//
WaitList[0] = Event;
WaitList[1] = TimerEvent;
Status = uefi_call_wrapper(BS->WaitForEvent, 3, 2, WaitList, &Index);
uefi_call_wrapper(BS->CloseEvent, 1, TimerEvent);
//
// If the timer expired, change the return to timed out
//
if (!EFI_ERROR(Status) && Index == 1) {
Status = EFI_TIMEOUT;
}
}
} else {
//
// No timeout... just wait on the event
//
Status = uefi_call_wrapper(BS->WaitForEvent, 3, 1, &Event, &Index);
ASSERT (!EFI_ERROR(Status));
ASSERT (Index == 0);
}
return Status;
}
VOID
WaitForEventWithTimeout (
IN EFI_EVENT Event,
IN UINTN Timeout,
IN UINTN Row,
IN UINTN Column,
IN CHAR16 *String,
IN EFI_INPUT_KEY TimeoutKey,
OUT EFI_INPUT_KEY *Key
)
{
EFI_STATUS Status;
do {
PrintAt (Column, Row, String, Timeout);
Status = WaitForSingleEvent (Event, 10000000);
if (Status == EFI_SUCCESS) {
if (!EFI_ERROR(uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, Key))) {
return;
}
}
} while (Timeout > 0);
CopyMem(Key, &TimeoutKey, sizeof(EFI_INPUT_KEY));
}