Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...

[reactos.git] / drivers / parallel / parport / misc.c

diff --git a/drivers/parallel/parport/misc.c b/drivers/parallel/parport/misc.c
new file mode 100644 (file)
index 0000000..f9a27bc
--- /dev/null
+++ b/drivers/parallel/parport/misc.c
@@ -0,0 +1,86 @@
+/*
+ * COPYRIGHT:       See COPYING in the top level directory
+ * PROJECT:         Parallel Port Function Driver
+ * FILE:            drivers/parallel/parport/misc.c
+ * PURPOSE:         Miscellaneous functions
+ */
+
+#include "parport.h"
+
+
+static IO_COMPLETION_ROUTINE ForwardIrpAndWaitCompletion;
+
+/* FUNCTIONS ****************************************************************/
+
+static
+NTSTATUS
+NTAPI
+ForwardIrpAndWaitCompletion(IN PDEVICE_OBJECT DeviceObject,
+                            IN PIRP Irp,
+                            IN PVOID Context)
+{
+    if (Irp->PendingReturned)
+        KeSetEvent((PKEVENT)Context, IO_NO_INCREMENT, FALSE);
+    return STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+
+NTSTATUS
+ForwardIrpAndWait(IN PDEVICE_OBJECT DeviceObject,
+                  IN PIRP Irp)
+{
+    PDEVICE_OBJECT LowerDevice;
+    KEVENT Event;
+    NTSTATUS Status;
+
+    LowerDevice = ((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
+    ASSERT(LowerDevice);
+
+    KeInitializeEvent(&Event, NotificationEvent, FALSE);
+    IoCopyCurrentIrpStackLocationToNext(Irp);
+
+    DPRINT("Calling lower device %p\n", LowerDevice);
+    IoSetCompletionRoutine(Irp, ForwardIrpAndWaitCompletion, &Event, TRUE, TRUE, TRUE);
+
+    Status = IoCallDriver(LowerDevice, Irp);
+    if (Status == STATUS_PENDING)
+    {
+        Status = KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
+        if (NT_SUCCESS(Status))
+            Status = Irp->IoStatus.Status;
+    }
+
+    return Status;
+}
+
+
+NTSTATUS
+NTAPI
+ForwardIrpAndForget(IN PDEVICE_OBJECT DeviceObject,
+                    IN PIRP Irp)
+{
+    PDEVICE_OBJECT LowerDevice;
+
+    if (((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->Common.IsFDO)
+        LowerDevice = ((PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
+    else
+        LowerDevice = ((PPDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->AttachedFdo;
+    ASSERT(LowerDevice);
+
+    IoSkipCurrentIrpStackLocation(Irp);
+    return IoCallDriver(LowerDevice, Irp);
+}
+
+
+PVOID
+GetUserBuffer(IN PIRP Irp)
+{
+    ASSERT(Irp);
+
+    if (Irp->MdlAddress)
+        return Irp->MdlAddress;
+    else
+        return Irp->AssociatedIrp.SystemBuffer;
+}
+
+/* EOF */