Leaked source code of windows server 2003
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/***************************************************************************
* * Copyright (C) 2001 Microsoft Corporation. All Rights Reserved. * * File: dp8simreceive.h * * Content: Header for receive object class. * * History: * Date By Reason * ======== ======== ========= * 05/05/01 VanceO Created. * ***************************************************************************/
//=============================================================================
// Receive object class
//=============================================================================
class CDP8SimReceive { public:
inline BOOL IsValidObject(void) { if ((this == NULL) || (IsBadWritePtr(this, sizeof(CDP8SimReceive)))) { return FALSE; }
if (*((DWORD*) (&this->m_Sig)) != 0x524d4953) // 0x52 0x4d 0x49 0x53 = 'RMIS' = 'SIMR' in Intel order
{ return FALSE; }
return TRUE; };
static BOOL FPMAlloc(void* pvItem, void* pvContext) { CDP8SimReceive * pDP8SimReceive = (CDP8SimReceive*) pvItem;
pDP8SimReceive->m_Sig[0] = 'S'; pDP8SimReceive->m_Sig[1] = 'I'; pDP8SimReceive->m_Sig[2] = 'M'; pDP8SimReceive->m_Sig[3] = 'r'; // start with lower case so we can tell when it's in the pool or not
pDP8SimReceive->m_lRefCount = 0; pDP8SimReceive->m_pDP8SimEndpoint = NULL; ZeroMemory(&pDP8SimReceive->m_data, sizeof(pDP8SimReceive->m_data)); pDP8SimReceive->m_dwLatencyAdded = 0;
return TRUE; }
#undef DPF_MODNAME
#define DPF_MODNAME "CDP8SimReceive::FPMInitialize"
static void FPMInitialize(void* pvItem, void* pvContext) { CDP8SimReceive * pDP8SimReceive = (CDP8SimReceive*) pvItem; SPIE_DATA * pData = (SPIE_DATA*) pvContext;
pDP8SimReceive->m_lRefCount++; // somebody is getting a pointer to this object
DNASSERT(pDP8SimReceive->m_lRefCount == 1);
//
// Get an endpoint reference.
//
pDP8SimReceive->m_pDP8SimEndpoint = (CDP8SimEndpoint*) pData->pEndpointContext; DNASSERT(pDP8SimReceive->m_pDP8SimEndpoint->IsValidObject()); pDP8SimReceive->m_pDP8SimEndpoint->AddRef();
DNASSERT(pData->pReceivedData->pNext == NULL);
//
// Copy the receive data block.
//
pDP8SimReceive->m_data.hEndpoint = (HANDLE) pDP8SimReceive->m_pDP8SimEndpoint; pDP8SimReceive->m_data.pEndpointContext = pDP8SimReceive->m_pDP8SimEndpoint->GetUserContext(); pDP8SimReceive->m_data.pReceivedData = pData->pReceivedData;
//
// Change the signature before handing it out.
//
pDP8SimReceive->m_Sig[3] = 'R'; }
#undef DPF_MODNAME
#define DPF_MODNAME "CDP8SimReceive::FPMRelease"
static void FPMRelease(void* pvItem) { CDP8SimReceive * pDP8SimReceive = (CDP8SimReceive*) pvItem;
DNASSERT(pDP8SimReceive->m_lRefCount == 0);
//
// Release the endpoint reference.
//
DNASSERT(pDP8SimReceive->m_pDP8SimEndpoint != NULL);
pDP8SimReceive->m_pDP8SimEndpoint->Release(); pDP8SimReceive->m_pDP8SimEndpoint = NULL;
//
// Change the signature before putting the object back in the pool.
//
pDP8SimReceive->m_Sig[3] = 'r'; }
#undef DPF_MODNAME
#define DPF_MODNAME "CDP8SimReceive::FPMDealloc"
static void FPMDealloc(void* pvItem) { const CDP8SimReceive * pDP8SimReceive = (CDP8SimReceive*) pvItem;
DNASSERT(pDP8SimReceive->m_lRefCount == 0); DNASSERT(pDP8SimReceive->m_pDP8SimEndpoint == NULL); }
#undef DPF_MODNAME
#define DPF_MODNAME "CDP8SimReceive::AddRef"
inline void AddRef(void) { LONG lResult;
lResult = InterlockedIncrement(&this->m_lRefCount); DNASSERT(lResult > 0); DPFX(DPFPREP, 9, "Receive 0x%p refcount = %u.", this, lResult); };
#undef DPF_MODNAME
#define DPF_MODNAME "CDP8SimReceive::Release"
inline void Release(void) { LONG lResult;
lResult = InterlockedDecrement(&this->m_lRefCount); DNASSERT(lResult >= 0); if (lResult == 0) { DPFX(DPFPREP, 9, "Receive 0x%p refcount = 0, returning to pool.", this);
//
// Time to return this object to the pool.
//
g_FPOOLReceive.Release(this); } else { DPFX(DPFPREP, 9, "Receive 0x%p refcount = %u.", this, lResult); } };
inline CDP8SimEndpoint * GetEndpoint(void) { return this->m_pDP8SimEndpoint; }; inline SPIE_DATA * GetReceiveDataBlockPtr(void) { return (&this->m_data); }; inline HANDLE GetReceiveDataBlockEndpoint(void) { return this->m_data.hEndpoint; }; inline DWORD GetLatencyAdded(void) const { return this->m_dwLatencyAdded; };
inline void SetLatencyAdded(DWORD dwLatency) { this->m_dwLatencyAdded = dwLatency; };
private: BYTE m_Sig[4]; // debugging signature ('SIMR')
LONG m_lRefCount; // number of references for this object
CDP8SimEndpoint * m_pDP8SimEndpoint; // pointer to source endpoint
SPIE_DATA m_data; // receive data block
DWORD m_dwLatencyAdded; // the latency added, saved for incrementing statistics on receive indication
};
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