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https://github.com/reactos/reactos.git
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142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/*
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* PROJECT: ReactOS Video Port Driver
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: win32ss/drivers/videoprt/event.c
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* PURPOSE: Event Support Routines
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include "videoprt.h"
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#include "../../gdi/eng/engevent.h"
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#define NDEBUG
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#include <debug.h>
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/* PUBLIC FUNCTIONS ***********************************************************/
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/*
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* @implemented
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*/
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VP_STATUS
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NTAPI
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VideoPortCreateEvent(IN PVOID HwDeviceExtension,
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IN ULONG EventFlag,
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IN PVOID Unused,
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OUT PEVENT *Event)
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{
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VP_STATUS Result = NO_ERROR;
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PVIDEO_PORT_EVENT EngEvent;
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/* Allocate memory for the event structure */
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EngEvent = ExAllocatePoolWithTag(NonPagedPool,
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sizeof(VIDEO_PORT_EVENT) + sizeof(KEVENT),
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TAG_VIDEO_PORT);
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if (EngEvent)
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{
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/* Set KEVENT pointer */
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EngEvent->pKEvent = EngEvent + 1;
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/* Initialize the kernel event */
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KeInitializeEvent(EngEvent->pKEvent,
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(EventFlag & EVENT_TYPE_MASK) ?
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NotificationEvent : SynchronizationEvent,
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EventFlag & INITIAL_EVENT_STATE_MASK);
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/* Pass pointer to our structure to the caller */
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*Event = (PEVENT)EngEvent;
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DPRINT("VideoPortCreateEvent() created %p\n", EngEvent);
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}
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else
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{
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/* Out of memory */
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DPRINT("VideoPortCreateEvent() failed\n");
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Result = ERROR_NOT_ENOUGH_MEMORY;
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}
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/* Return result */
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return Result;
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}
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/*
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* @implemented
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*/
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VP_STATUS
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NTAPI
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VideoPortDeleteEvent(IN PVOID HwDeviceExtension,
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IN PEVENT Event)
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{
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/* Handle error cases */
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if (!Event) return ERROR_INVALID_PARAMETER;
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if (Event->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
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if (!Event->pKEvent) return ERROR_INVALID_PARAMETER;
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/* Free storage */
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ExFreePool(Event);
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/* Indicate success */
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return NO_ERROR;
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}
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/*
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* @implemented
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*/
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LONG
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NTAPI
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VideoPortSetEvent(IN PVOID HwDeviceExtension,
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IN PEVENT Event)
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{
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return KeSetEvent(Event->pKEvent, IO_NO_INCREMENT, FALSE);
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}
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/*
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* @implemented
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*/
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VOID
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NTAPI
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VideoPortClearEvent(IN PVOID HwDeviceExtension,
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IN PEVENT Event)
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{
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KeClearEvent(Event->pKEvent);
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}
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/*
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* @implemented
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*/
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VP_STATUS
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NTAPI
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VideoPortWaitForSingleObject(IN PVOID HwDeviceExtension,
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IN PVOID Event,
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IN PLARGE_INTEGER Timeout OPTIONAL)
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{
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PVIDEO_PORT_EVENT EngEvent = Event;
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NTSTATUS Status;
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/* Handle error cases */
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if (!EngEvent) return ERROR_INVALID_PARAMETER;
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if (!EngEvent->pKEvent) return ERROR_INVALID_PARAMETER;
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if (EngEvent->fFlags & ENG_EVENT_USERMAPPED) return ERROR_INVALID_PARAMETER;
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/* Do the actual wait */
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Status = KeWaitForSingleObject(EngEvent->pKEvent,
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Executive,
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KernelMode,
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FALSE,
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Timeout);
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if (Status == STATUS_TIMEOUT)
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{
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/* Convert to wait timeout, otherwise NT_SUCCESS would return NO_ERROR */
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return WAIT_TIMEOUT;
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}
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else if (NT_SUCCESS(Status))
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{
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/* All other success codes are Win32 success */
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return NO_ERROR;
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}
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/* Otherwise, return default Win32 failure */
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return ERROR_INVALID_PARAMETER;
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}
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/* EOF */
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