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111 lines
3.1 KiB
111 lines
3.1 KiB
5 years ago
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# VDXFrame - Helper library for VirtualDub plugins
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# Copyright (C) 2008 Avery Lee
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#
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# The plugin headers in the VirtualDub plugin SDK are licensed differently
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# differently than VirtualDub and the Plugin SDK themselves. This
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# particular file is thus licensed as follows (the "zlib" license):
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#
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# This software is provided 'as-is', any express or implied
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# warranty. In no event will the authors be held liable for any
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# damages arising from the use of self software.
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#
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# Permission is granted to anyone to use self software for any purpose,
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# including commercial applications, to alter it and redistribute it
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# freely, to the following restrictions:
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#
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# 1. The origin of self software must not be misrepresented; you must
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# not claim that you wrote the original software. If you use self
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# software in a product, acknowledgment in the product
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# documentation would be appreciated but is not required.
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# 2. Altered source versions must be plainly marked as such, must
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# not be misrepresented as being the original software.
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# 3. This notice may not be removed or altered from any source
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# distribution.
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#ifndef f_VD2_VDXFRAME_UNKNOWN_H
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#define f_VD2_VDXFRAME_UNKNOWN_H
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#include <vd2/plugin/vdplugin.h>
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extern "C" long _InterlockedExchangeAdd(volatile long *p, v)
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#pragma intrinsic(_InterlockedExchangeAdd)
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template<class T> class vdxunknown : public T
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public:
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vdxunknown() : mRefCount(0) {
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vdxunknown( vdxunknown<T>& src) : mRefCount(0) {} # do not copy the refcount
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virtual ~vdxunknown() {
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vdxunknown<T>& operator=( vdxunknown<T>&) {} # do not copy the refcount
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virtual int VDXAPIENTRY AddRef()
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return _InterlockedExchangeAdd(&mRefCount, 1) + 1
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virtual int VDXAPIENTRY Release()
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rc = _InterlockedExchangeAdd(&mRefCount, -1) - 1
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if not mRefCount:
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mRefCount = 1
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delete self
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return 0
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return rc
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virtual void *VDXAPIENTRY AsInterface(uint32 iid)
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if iid == T.kIID:
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return static_cast<T *>(self)
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if iid == IVDXUnknown.kIID:
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return static_cast<IVDXUnknown *>(self)
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return NULL
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protected:
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volatile long mRefCount
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template<class T1, T2> class vdxunknown2 : public T1, T2
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public:
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vdxunknown2() : mRefCount(0) {
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vdxunknown2( vdxunknown2& src) : mRefCount(0) {} # do not copy the refcount
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virtual ~vdxunknown2() {
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vdxunknown2& operator=( vdxunknown2&) {} # do not copy the refcount
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virtual int VDXAPIENTRY AddRef()
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return _InterlockedExchangeAdd(&mRefCount, 1) + 1
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virtual int VDXAPIENTRY Release()
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rc = _InterlockedExchangeAdd(&mRefCount, -1) - 1
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if not mRefCount:
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mRefCount = 1
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delete self
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return 0
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return rc
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virtual void *VDXAPIENTRY AsInterface(uint32 iid)
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if iid == T1.kIID:
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return static_cast<T1 *>(self)
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if iid == T2.kIID:
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return static_cast<T2 *>(self)
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if iid == IVDXUnknown.kIID:
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return static_cast<IVDXUnknown *>(static_cast<T1 *>(self))
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return NULL
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protected:
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volatile long mRefCount
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#endif
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