79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
//____________________________________________________________________________
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1995 - 1999
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//
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// File: dll.h
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//
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// Contents: DLL refcounting classes, wait cursor class, and error reporting
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// functions.
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//
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// Classes: CDll, CDllRef
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//
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// History: 1/24/1996 RaviR Created
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// 6/09/1997 EricB Error Reporting.
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//
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//____________________________________________________________________________
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#ifndef _DLL_H_
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#define _DLL_H_
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#define MAX_TITLE 80
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#define MAX_MSG_LEN 512
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#define MAX_ERRORMSG MAX_MSG_LEN
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void LoadErrorMessage(HRESULT hr, int nStr, PTSTR* pptsz);
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class CDll
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{
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public:
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static ULONG AddRef() { return InterlockedIncrement((LONG*)&s_cObjs); }
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static ULONG Release() { return InterlockedDecrement((LONG*)&s_cObjs); }
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static void LockServer(BOOL fLock) {
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(fLock == TRUE) ? InterlockedIncrement((LONG*)&s_cLocks)
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: InterlockedDecrement((LONG*)&s_cLocks);
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}
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static HRESULT CanUnloadNow(void) {
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return (0L == s_cObjs && 0L == s_cLocks) ? S_OK : S_FALSE;
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}
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static ULONG s_cObjs;
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static ULONG s_cLocks;
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}; // class CDll
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class CDllRef
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{
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public:
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CDllRef(void) { CDll::AddRef(); }
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~CDllRef(void) { CDll::Release(); }
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}; // class CDllRef
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class CWaitCursor
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{
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public:
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CWaitCursor() {m_cOld=SetCursor(m_cWait=LoadCursor(NULL, IDC_WAIT));}
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~CWaitCursor() {SetCursor(m_cOld);}
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void SetWait() {SetCursor(m_cWait);}
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void SetOld() {SetCursor(m_cOld);}
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private:
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HCURSOR m_cWait;
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HCURSOR m_cOld;
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} ;
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// This wrapper function required to make prefast shut up when we are
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// initializing a critical section in a constructor.
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void ExceptionPropagatingInitializeCriticalSection(LPCRITICAL_SECTION critsec);
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#endif // _DLL_H_
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