Fix #162 (missing getNBytes() functions in GPU2 backend.)

src/faust_linear_operator/GPU2/faust_MatDense_gpu.cpp.in

@@ -688,4 +688,10 @@ namespace Faust
 			}
 		}
 
+	template<>
+		size_t MatDense<FSFG,GPU2>::getNBytes() const
+		{
+			return this->getNbCol()*this->getNbRow()*sizeof(FSFG);
+		}
+
 };

src/faust_linear_operator/GPU2/faust_MatDense_gpu.h

@@ -118,6 +118,7 @@ namespace Faust
 				void Display() const;
 				std::string to_string(const bool transpose=false, const bool displaying_small_mat_elts=false) const;
 				MatType getType() const;
+				size_t getNBytes() const;
 				int32_t getNbRow() const;
 				int32_t getNbCol() const;
 				faust_unsigned_int getNonZeros() const;

src/faust_linear_operator/GPU2/faust_MatGeneric_gpu.h

@@ -22,6 +22,7 @@ namespace Faust
 				bool is_identity;
 				bool is_zeros;
 			public:
+				virtual size_t getNBytes() const=0;
 				virtual MatType getType() const=0;
 				virtual int32_t getNbRow() const=0;
 				virtual int32_t getNbCol() const=0;

src/faust_linear_operator/GPU2/faust_MatSparse_gpu.cpp.in

@@ -449,4 +449,9 @@ namespace Faust
 			vec.gpu_mat = gpu_dmat;
 		}
 
+	template<>
+		size_t Faust::MatSparse<FSFG,GPU2>::getNBytes() const
+		{
+			return this->getNonZeros()*(sizeof(FSFG)+sizeof(int))+(this->getNbRow()+1)*sizeof(int);
+		}
 };

src/faust_linear_operator/GPU2/faust_MatSparse_gpu.h

@@ -83,6 +83,7 @@ namespace Faust
 				void move(const int32_t dev_id=-1, const void* stream=nullptr);
 				int32_t getNbRow() const;
 				int32_t getNbCol() const;
+				size_t getNBytes() const;
 				faust_unsigned_int getNonZeros() const;
 				int32_t getDevice() const;
 				void Display() const;