151 lines
3 KiB
C++
151 lines
3 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997 - 2000.
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//
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// File: N M H N E T . C P P
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//
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// Contents: Home networking support routines
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//
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// Notes:
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//
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// Author: jonburs 15 August 2000
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//
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//----------------------------------------------------------------------------
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#include "pch.h"
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#pragma hdrstop
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#include "nmbase.h"
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#include "nmhnet.h"
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//
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// Exported globals
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//
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IHNetCfgMgr *g_pHNetCfgMgr;
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LONG g_lHNetModifiedEra;
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//
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// Private globals
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//
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CRITICAL_SECTION g_csHNetCfgMgr;
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BOOLEAN g_fCreatingHNetCfgMgr;
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VOID
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InitializeHNetSupport(
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VOID
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)
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{
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g_pHNetCfgMgr = NULL;
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g_lHNetModifiedEra = 0;
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g_fCreatingHNetCfgMgr = FALSE;
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__try
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{
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InitializeCriticalSection(&g_csHNetCfgMgr);
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}
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__except(EXCEPTION_EXECUTE_HANDLER)
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{
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AssertSz(FALSE, "InitializeHNetSupport: exception during InitializeCriticalSection");
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}
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}
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VOID
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CleanupHNetSupport(
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VOID
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)
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{
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ReleaseObj(g_pHNetCfgMgr);
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DeleteCriticalSection(&g_csHNetCfgMgr);
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}
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HRESULT
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HrGetHNetCfgMgr(
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IHNetCfgMgr **ppHNetCfgMgr
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)
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{
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HRESULT hr = S_OK;
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Assert(ppHNetCfgMgr);
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*ppHNetCfgMgr = NULL;
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//
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// Make sure that the service is in the correct state.
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//
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if (SERVICE_RUNNING != _Module.DwServiceStatus ())
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{
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hr = E_UNEXPECTED;
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}
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else
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{
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if (NULL == g_pHNetCfgMgr)
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{
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EnterCriticalSection(&g_csHNetCfgMgr);
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if (!g_fCreatingHNetCfgMgr && NULL == g_pHNetCfgMgr)
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{
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IHNetCfgMgr *pHNetCfgMgr;
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g_fCreatingHNetCfgMgr = TRUE;
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LeaveCriticalSection(&g_csHNetCfgMgr);
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hr = HrCreateInstance(
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CLSID_HNetCfgMgr,
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CLSCTX_INPROC_SERVER,
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&pHNetCfgMgr
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);
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EnterCriticalSection(&g_csHNetCfgMgr);
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Assert(NULL == g_pHNetCfgMgr);
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g_fCreatingHNetCfgMgr = FALSE;
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g_pHNetCfgMgr = pHNetCfgMgr;
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}
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else if (NULL == g_pHNetCfgMgr)
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{
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//
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// Another thread is already trying to create the
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// object. (Spin for a small amount of time to see
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// if that thread succeeds?)
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//
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hr = HRESULT_FROM_WIN32(ERROR_BUSY);
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}
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LeaveCriticalSection(&g_csHNetCfgMgr);
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}
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Assert(g_pHNetCfgMgr || FAILED(hr));
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if (SUCCEEDED(hr))
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{
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*ppHNetCfgMgr = g_pHNetCfgMgr;
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AddRefObj(*ppHNetCfgMgr);
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}
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}
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return hr;
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}
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//
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// CNetConnectionHNetUtil implementation -- INetConnectionHNetUtil routines
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//
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STDMETHODIMP
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CNetConnectionHNetUtil::NotifyUpdate(
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VOID
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)
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{
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InterlockedIncrement(&g_lHNetModifiedEra);
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return S_OK;
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}
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