IDebugPendingBreakpoint2::CanBind

 

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決定此暫止中斷點可以繫結到程式碼的位置。

語法

HRESULT CanBind (   
   IEnumDebugErrorBreakpoints2** ppErrorEnum  
);  

int CanBind (   
   out IEnumDebugErrorBreakpoints2 ppErrorEnum  
);  

參數

ppErrorEnum
[out]傳回IEnumDebugErrorBreakpoints2物件，其中包含一份IDebugErrorBreakpoint2物件如果可能有錯誤。

傳回值

如果成功，傳回S_OK.傳回S_FALSE中斷點無法繫結，如果在此情況下會傳回錯誤的ppErrorEnum參數。 反之則傳回錯誤碼。 傳回E_BP_DELETED若已刪除中斷點。

備註

這個方法會呼叫來決定會發生什麼事如果這暫止中斷點繫結。 呼叫繫結方法實際繫結暫止中斷點。

範例

下列範例示範如何實作這種簡單的方式CPendingBreakpoint公開物件IDebugPendingBreakpoint2介面。

HRESULT CPendingBreakpoint::CanBind(IEnumDebugErrorBreakpoints2** ppErrorEnum)    
{    
   HRESULT hr;    
   HRESULT hrT;    
  
   // Check for a valid pointer to an error breakpoint enumerator   
   // interface; otherwise, return hr = E_INVALIDARG.    
   if (ppErrorEnum)    
   {    
      // Verify that the pending breakpoint has not been deleted. If   
      // deleted, then return hr = E_BP_DELETED.    
      if (m_state.state != PBPS_DELETED)    
      {    
         // Verify that the breakpoint is a file/line breakpoint.    
         if (IsFlagSet(m_pBPRequest->m_bpRequestInfo.dwFields, BPREQI_BPLOCATION) &&  
             m_pBPRequest->m_bpRequestInfo.bpLocation.bpLocationType == BPLT_CODE_FILE_LINE)    
         {    
            hr = S_OK;    
         }    
         // If the breakpoint type is not a file/line breakpoint, then the   
         // result should be an error breakpoint.    
         else    
         {    
            // If the error breakpoint member variable does not have   
            // allocated memory.  
            if (!m_pErrorBP)    
            {    
               // Create, AddRef, and initialize a CErrorBreakpoint object.    
               if (CComObject<CErrorBreakpoint>::CreateInstance(&m_pErrorBP) == S_OK)    
               {    
                  m_pErrorBP->AddRef();    
                  m_pErrorBP->Initialize(this);    
               }    
            }    
  
            // Create a new enumerator of error breakpoints.    
             CComObject<CEnumDebugErrorBreakpoints>* pErrorEnum;    
            if (CComObject<CEnumDebugErrorBreakpoints>::CreateInstance(&pErrorEnum) == S_OK)    
            {    
               // Get the IDebugErrorBreakpoint2 information for the     
               // CErrorBreakpoint object.    
               CComPtr<IDebugErrorBreakpoint2> spErrorBP;    
               hrT = m_pErrorBP->QueryInterface(&spErrorBP);    
               assert(hrT == S_OK);    
               if (hrT == S_OK)    
               {    
                  // Initialize the new enumerator of error breakpoints   
                  // with the IDebugErrorBreakpoint2 information.      
                  IDebugErrorBreakpoint2* rgpErrorBP[] = { spErrorBP.p };    
                  hrT = pErrorEnum->Init(rgpErrorBP, &(rgpErrorBP[1]), NULL, AtlFlagCopy);    
                  if (hrT == S_OK)    
                  {    
                     // Verify that the passed IEnumDebugErrorBreakpoints2     
                     // interface can be successful queried by the  
                     // created CEnumDebugErrorBreakpoints object.    
                     hrT = pErrorEnum->QueryInterface(ppErrorEnum);    
                     assert(hrT == S_OK);    
                  }    
               }    
  
               // Otherwise, delete the CEnumDebugErrorBreakpoints object.    
               if (FAILED(hrT))    
               {    
                  delete pErrorEnum;    
               }    
            }    
  
            hr = S_FALSE;    
         }    
      }    
      else    
      {    
         hr = E_BP_DELETED;    
      }    
   }    
   else    
   {    
      hr = E_INVALIDARG;    
   }    
  
   return hr;    
}    

另請參閱

IDebugPendingBreakpoint2
IEnumDebugErrorBreakpoints2
IDebugErrorBreakpoint2
繫結