[Code] SpGEMM: minor fixes && create result vector without dense vector scan

Author: EgorOrachyov

cubool/CMakeLists.txt

@@ -117,7 +117,6 @@ if (CUBOOL_WITH_CUDA)
         sources/cuda/cuda_backend.cu
         sources/cuda/cuda_instance.hpp
         sources/cuda/cuda_instance.cu
-        sources/cuda/cuda_instance.cpp
         sources/cuda/cuda_matrix.hpp
         sources/cuda/cuda_matrix.cu
         sources/cuda/cuda_matrix_ewiseadd.cu

cubool/sources/cuda/cuda_instance.cpp

@@ -30,6 +30,13 @@
 
 namespace cubool {
 
+    volatile CudaInstance* CudaInstance::gInstance = nullptr;
+
+    CudaInstance::CudaInstance(bool useManagedMemory) {
+        gInstance = this;
+        mMemoryType = useManagedMemory? Managed: Default;
+    }
+
     CudaInstance::~CudaInstance() {
         assert(mHostAllocCount == 0);
         assert(mDeviceAllocCount == 0);
@@ -108,4 +115,29 @@ namespace cubool {
         }
     }
 
+    void CudaInstance::allocate(void* &ptr, size_t size) const {
+        ptr = malloc(size);
+        CHECK_RAISE_ERROR(ptr != nullptr, MemOpFailed, "Failed to allocate memory on the CPU");
+        mHostAllocCount++;
+    }
+
+    void CudaInstance::deallocate(void* ptr) const {
+        CHECK_RAISE_ERROR(ptr != nullptr, InvalidArgument, "Passed null ptr to free");
+        free(ptr);
+        mHostAllocCount--;
+    }
+
+    CudaInstance& CudaInstance::getInstanceRef() {
+        CHECK_RAISE_ERROR(gInstance != nullptr, InvalidState, "No instance in the system");
+        return (CudaInstance&) *gInstance;
+    }
+
+    CudaInstance* CudaInstance::getInstancePtr() {
+        return (CudaInstance* ) gInstance;
+    }
+
+    bool CudaInstance::isInstancePresent() {
+        return gInstance != nullptr;
+    }
+
 }

cubool/sources/cuda/cuda_instance.cu

@@ -35,6 +35,7 @@ namespace cubool {
      */
     class CudaInstance {
     public:
+
         enum MemType {
             Default,
             Managed