Ensure that CUDA is chosen over OpenCL when both are available

platforms/cuda/include/CudaPlatform.h

@@ -47,9 +47,7 @@ public:
         static const std::string name = "CUDA";
         return name;
     }
-    double getSpeed() const {
-        return 100;
-    }
+    double getSpeed() const;
     bool supportsDoublePrecision() const;
     const std::string& getPropertyValue(const Context& context, const std::string& property) const;
     void setPropertyValue(Context& context, const std::string& property, const std::string& value) const;

platforms/cuda/src/CudaPlatform.cpp

@@ -114,6 +114,10 @@ CudaPlatform::CudaPlatform() {
 #endif
 }
 
+double CudaPlatform::getSpeed() const {
+    return 100;
+}
+
 bool CudaPlatform::supportsDoublePrecision() const {
     return true;
 }

platforms/opencl/include/OpenCLPlatform.h

@@ -46,9 +46,7 @@ public:
         static const std::string name = "OpenCL";
         return name;
     }
-    double getSpeed() const {
-        return 100;
-    }
+    double getSpeed() const;
     bool supportsDoublePrecision() const;
     const std::string& getPropertyValue(const Context& context, const std::string& property) const;
     void setPropertyValue(Context& context, const std::string& property, const std::string& value) const;

platforms/opencl/src/OpenCLPlatform.cpp

@@ -85,6 +85,10 @@ OpenCLPlatform::OpenCLPlatform() {
     setPropertyDefaultValue(OpenCLPrecision(), "single");
 }
 
+double OpenCLPlatform::getSpeed() const {
+    return 50;
+}
+
 bool OpenCLPlatform::supportsDoublePrecision() const {
     return true;
 }

platforms/reference/include/ReferencePlatform.h

@@ -49,9 +49,7 @@ public:
         static const std::string name = "Reference";
         return name;
     }
-    double getSpeed() const {
-        return 1;
-    }
+    double getSpeed() const;
     bool supportsDoublePrecision() const;
     void contextCreated(ContextImpl& context, const std::map<std::string, std::string>& properties) const;
     void contextDestroyed(ContextImpl& context) const;

platforms/reference/src/ReferencePlatform.cpp

@@ -73,6 +73,10 @@ ReferencePlatform::ReferencePlatform() {
     registerKernelFactory(RemoveCMMotionKernel::Name(), factory);
 }
 
+double ReferencePlatform::getSpeed() const {
+    return 1;
+}
+
 bool ReferencePlatform::supportsDoublePrecision() const {
     return (sizeof(RealOpenMM) >= sizeof(double));
 }