77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
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#if !defined(_FUSION_MI_CIPTR_H_INCLUDED_)
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#define _FUSION_MI_CIPTR_H_INCLUDED_
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#pragma once
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#include <unknwn.h>
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#include "CSxsPreserveLastError.h"
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template <typename T> class CSmartRef
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{
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public:
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inline CSmartRef() : m_pt(NULL) { }
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inline CSmartRef(const CSmartRef& r) : m_pt(r.m_pt) { if (m_pt) m_pt->AddRef(); }
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inline CSmartRef(T *pt) : m_pt(pt) { if (pt != NULL) pt->AddRef(); }
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inline ~CSmartRef() { if (m_pt != NULL) { CSxsPreserveLastError ple; m_pt->Release(); m_pt = NULL; ple.Restore(); } }
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inline T *operator ->() const { ASSERT_NTC(m_pt != NULL); return m_pt; }
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inline T **operator &() { ASSERT_NTC(m_pt == NULL); return &m_pt; }
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CSmartRef<T> &operator =(T *pt) { if (pt != NULL) pt->AddRef(); if (m_pt != NULL) m_pt->Release(); m_pt = pt; return *this; }
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CSmartRef<T> &operator =(const CSmartRef& r) { return operator=(r.m_pt); }
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inline operator T *() const { return m_pt; }
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inline T *Ptr() const { return m_pt; }
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inline void Release() { if (m_pt != NULL) { m_pt->Release(); m_pt = NULL; } }
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T *Disown() { T *pt = m_pt; m_pt = NULL; return pt; }
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inline void Take(CSmartRef<T> &r) { if (r.m_pt != NULL) { r.m_pt->AddRef(); } if (m_pt != NULL) { m_pt->Release(); } m_pt = r.m_pt; r.m_pt = NULL; }
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HRESULT Initialize(T *pt) { (*this) = pt; return NOERROR; }
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HRESULT CreateInstance(REFCLSID rclsid, IUnknown *pUnkOuter = NULL, CLSCTX clsctx = static_cast<CLSCTX>(CLSCTX_ALL))
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{
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T *pt = NULL;
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HRESULT hr = ::CoCreateInstance(rclsid, pUnkOuter, clsctx, __uuidof(T), (LPVOID *) &pt);
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if (FAILED(hr)) return hr;
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if (m_pt != NULL)
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m_pt->Release();
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m_pt = pt;
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pt = NULL;
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return NOERROR;
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}
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HRESULT QueryInterfaceFrom(IUnknown *pIUnknown)
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{
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HRESULT hr = NOERROR;
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T *pt = NULL;
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if (pIUnknown == NULL)
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this->Release();
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else
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{
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hr = pIUnknown->QueryInterface(__uuidof(T), (void **) &pt);
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if (FAILED(hr))
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goto Exit;
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if (m_pt != NULL)
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m_pt->Release();
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m_pt = pt;
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}
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hr = NOERROR;
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Exit:
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return hr;
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}
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// Not protected, because we need access to it for the table-based aggregation
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// in fusioncom.h to work, but don't touch it unless you understand the consequences!!
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T *m_pt;
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};
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#endif
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