feat: Implement a custom MetaAllocator for uLib::Vector to enable GPU memory management and integrate CUDA support into the build system.

src/Core/testing/VectorMetaAllocatorTest.cpp

@@ -0,0 +1,71 @@
+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+#include "testing-prototype.h"
+#include <Core/Vector.h>
+
+int main() {
+  BEGIN_TESTING(VectorMetaAllocator);
+
+  uLib::Vector<int> v;
+  std::cout << "Pushing elements...\n";
+  v << 1, 2, 3, 4, 5;
+
+  std::cout << "Initial RAM contents: ";
+  for (size_t i = 0; i < v.size(); ++i) {
+    std::cout << v[i] << " ";
+    if (v[i] != (int)(i + 1)) {
+      std::cout << "\nError: Value mismatch at index " << i << "\n";
+      exit(1);
+    }
+  }
+  std::cout << "\n";
+
+#ifdef USE_CUDA
+  std::cout << "Moving to VRAM...\n";
+  v.MoveToVRAM();
+
+  int *vram_ptr = v.GetVRAMData();
+  if (vram_ptr) {
+    std::cout << "Successfully obtained VRAM pointer: " << vram_ptr << "\n";
+  } else {
+    std::cout << "Error: Failed to obtain VRAM pointer!\n";
+    exit(1);
+  }
+
+  std::cout << "Moving back to RAM...\n";
+  v.MoveToRAM();
+
+  std::cout << "RAM contents after VRAM trip: ";
+  for (size_t i = 0; i < v.size(); ++i) {
+    std::cout << v[i] << " ";
+    if (v[i] != (int)(i + 1)) {
+      std::cout << "\nError: Data corrupted after RAM->VRAM->RAM trip at index "
+                << i << "\n";
+      exit(1);
+    }
+  }
+  std::cout << "\n";
+#else
+  std::cout << "USE_CUDA not defined, skipping VRAM tests.\n";
+#endif
+
+  std::cout << "Scaling vector...\n";
+  for (size_t i = 0; i < v.size(); ++i)
+    v[i] *= 10;
+
+  std::cout << "Final contents: ";
+  for (size_t i = 0; i < v.size(); ++i)
+    std::cout << v[i] << " ";
+  std::cout << "\n";
+
+  END_TESTING;
+}