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      1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //    http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 
     15 #include "Unknown.hpp"
     16 
     17 #include "Debug.hpp"
     18 
     19 namespace D3D9
     20 {
     21 	Unknown::Unknown()
     22 	{
     23 		referenceCount = 0;
     24 		bindCount = 0;
     25 	}
     26 
     27 	Unknown::~Unknown()
     28 	{
     29 		ASSERT(referenceCount == 0);
     30 		ASSERT(bindCount == 0);
     31 	}
     32 
     33 	long Unknown::QueryInterface(const IID &iid, void **object)
     34 	{
     35 		if(iid == IID_IUnknown)
     36 		{
     37 			AddRef();
     38 			*object = this;
     39 
     40 			return S_OK;
     41 		}
     42 
     43 		*object = 0;
     44 
     45 		return NOINTERFACE(iid);
     46 	}
     47 
     48 	unsigned long Unknown::AddRef()
     49 	{
     50 		return InterlockedIncrement(&referenceCount);
     51 	}
     52 
     53 	unsigned long Unknown::Release()
     54 	{
     55 		int current = referenceCount;
     56 
     57 		if(referenceCount > 0)
     58 		{
     59 			current = InterlockedDecrement(&referenceCount);
     60 		}
     61 
     62 		if(referenceCount == 0 && bindCount == 0)
     63 		{
     64 			delete this;
     65 		}
     66 
     67 		return current;
     68 	}
     69 
     70 	void Unknown::bind()
     71 	{
     72 		InterlockedIncrement(&bindCount);
     73 	}
     74 
     75 	void Unknown::unbind()
     76 	{
     77 		ASSERT(bindCount > 0);
     78 
     79 		InterlockedDecrement(&bindCount);
     80 
     81 		if(referenceCount == 0 && bindCount == 0)
     82 		{
     83 			delete this;
     84 		}
     85 	}
     86 }