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107 lines
2 KiB
C++
107 lines
2 KiB
C++
/*++
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Copyright (c) Microsoft Corporation
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Module Name:
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FxUserObject.cpp
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Abstract:
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This module implements the user object that device
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driver writers can use to take advantage of the
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driver frameworks infrastructure.
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Author:
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Environment:
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Both kernel and user mode
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Revision History:
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--*/
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#include "fxobjectpch.hpp"
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#include "fxuserobject.hpp"
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// Tracing support
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extern "C" {
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#if defined(EVENT_TRACING)
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#include "FxUserObject.tmh"
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#endif
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}
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_Must_inspect_result_
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NTSTATUS
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FxUserObject::_Create(
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__in PFX_DRIVER_GLOBALS FxDriverGlobals,
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__in_opt PWDF_OBJECT_ATTRIBUTES Attributes,
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__out FxUserObject** pUserObject
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)
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{
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FxUserObject* pObject = NULL;
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NTSTATUS status;
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USHORT wrapperSize = 0;
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WDFOBJECT handle;
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#ifdef INLINE_WRAPPER_ALLOCATION
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#if FX_CORE_MODE==FX_CORE_USER_MODE
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wrapperSize = FxUserObject::GetWrapperSize();
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#endif
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#endif
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pObject = new(FxDriverGlobals, Attributes, wrapperSize)
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FxUserObject(FxDriverGlobals);
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if (pObject == NULL) {
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DoTraceLevelMessage(FxDriverGlobals, TRACE_LEVEL_ERROR, TRACINGOBJECT,
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"Memory allocation failed");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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status = pObject->Commit(Attributes, &handle);
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if (!NT_SUCCESS(status)) {
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DoTraceLevelMessage(FxDriverGlobals, TRACE_LEVEL_ERROR,
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TRACINGOBJECT,
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"FxObject::Commit failed %!STATUS!", status);
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}
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if (NT_SUCCESS(status)) {
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*pUserObject = pObject;
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}
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else {
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pObject->DeleteFromFailedCreate();
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}
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return status;
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}
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//
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// Public constructors
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//
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FxUserObject::FxUserObject(
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__in PFX_DRIVER_GLOBALS FxDriverGlobals
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) :
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#ifdef INLINE_WRAPPER_ALLOCATION
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FxNonPagedObject(FX_TYPE_USEROBJECT, sizeof(FxUserObject) + GetWrapperSize(), FxDriverGlobals)
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#else
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FxNonPagedObject(FX_TYPE_USEROBJECT, sizeof(FxUserObject), FxDriverGlobals)
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#endif
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{
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return;
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}
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