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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 #include <assert.h>
     20 
     21 namespace D3D8
     22 {
     23 	Unknown::Unknown()
     24 	{
     25 		referenceCount = 0;
     26 		bindCount = 0;
     27 	}
     28 
     29 	Unknown::~Unknown()
     30 	{
     31 		ASSERT(referenceCount == 0);
     32 		ASSERT(bindCount == 0);
     33 	}
     34 
     35 	long Unknown::QueryInterface(const IID &iid, void **object)
     36 	{
     37 		if(iid == IID_IUnknown)
     38 		{
     39 			AddRef();
     40 			*object = this;
     41 
     42 			return S_OK;
     43 		}
     44 
     45 		*object = 0;
     46 
     47 		return NOINTERFACE(iid);
     48 	}
     49 
     50 	unsigned long Unknown::AddRef()
     51 	{
     52 		return InterlockedIncrement(&referenceCount);
     53 	}
     54 
     55 	unsigned long Unknown::Release()
     56 	{
     57 		int current = referenceCount;
     58 
     59 		if(referenceCount > 0)
     60 		{
     61 			current = InterlockedDecrement(&referenceCount);
     62 		}
     63 
     64 		if(referenceCount == 0 && bindCount == 0)
     65 		{
     66 			delete this;
     67 		}
     68 
     69 		return current;
     70 	}
     71 
     72 	void Unknown::bind()
     73 	{
     74 		InterlockedIncrement(&bindCount);
     75 	}
     76 
     77 	void Unknown::unbind()
     78 	{
     79 		ASSERT(bindCount > 0);
     80 
     81 		InterlockedDecrement(&bindCount);
     82 
     83 		if(referenceCount == 0 && bindCount == 0)
     84 		{
     85 			delete this;
     86 		}
     87 	}
     88 }