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old/9apr26_prerefactor/include/amsculib2/amscu_cudafunctions.hpp

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+#ifndef __AMSCU_CUDAFUNCTIONS_HPP__
+#define __AMSCU_CUDAFUNCTIONS_HPP__
+
+
+namespace amscuda
+{
+    // device memory operations
+    // I'm trying to avoid some of the boilerplate mental overhead involved
+    // in calling cuda functions and handling errors
+
+    //frees devbuffer if it is not already NULL, and sets devbuffer to NULL
+    //wrapper to cudaFree
+    template<typename T> int cuda_free(T **devptr);
+
+    //copies hostbuffer to devbuffer
+    //initializes devbuffer from NULL if devbuffer is NULL
+    //if overwrite is true, deletes and reallocates devbuffer on device (for resizing)
+    template<typename T> int buffer_copytodevice(T *hostbuffer, T **devbuffer, long N, bool overwrite);
+
+    //copies info from devbuffer to hostbuffer
+    //initialzies hostbuffer from NULL if NULL
+    //if overwrite is true, deletes and reallocates hostbuffer on host with new[] (for resizing)
+    template<typename T> int buffer_copyfromdevice(T *devbuffer, T **hostbuffer, long N, bool overwrite);
+
+    //wrapper for cudaMemcpy - copies an item or struct (count 1) to the device
+    //initializes devptr from NULL if not already initialized
+    template<typename T> int cuda_copytodevice(T *hostptr, T **devptr);
+
+    //wrapper for cudaMemcpy - copies an item or struct (count 1) from device
+    //initializes hostptr from NULL with new if not already initialized
+    template<typename T> int cuda_copyfromdevice(T *devptr, T **hostptr);
+    
+    int cuda_errortrap(const char *msgheader);
+
+};
+
+#include <amsculib2/amscu_cudafunctions_impl.hpp>
+
+#endif
+