michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef GrKey_DEFINED
michael@0: #define GrKey_DEFINED
michael@0: 
michael@0: class GrKey : public SkRefCnt {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(GrKey)
michael@0: 
michael@0:     typedef intptr_t Hash;
michael@0: 
michael@0:     explicit GrKey(Hash hash) : fHash(hash) {}
michael@0: 
michael@0:     intptr_t getHash() const { return fHash; }
michael@0: 
michael@0:     bool operator<(const GrKey& rh) const {
michael@0:         return fHash < rh.fHash || (fHash == rh.fHash && this->lt(rh));
michael@0:     }
michael@0:     bool operator==(const GrKey& rh) const {
michael@0:         return fHash == rh.fHash && this->eq(rh);
michael@0:     }
michael@0: 
michael@0: protected:
michael@0:     virtual bool lt(const GrKey& rh) const = 0;
michael@0:     virtual bool eq(const GrKey& rh) const = 0;
michael@0: 
michael@0: private:
michael@0:     const Hash fHash;
michael@0: 
michael@0:     typedef SkRefCnt INHERITED;
michael@0: };
michael@0: 
michael@0: #endif