Fixes for HeapSchema to get a default block if none is passed

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Framework/AzCore/AzCore/Memory/HeapSchema.cpp

@@ -115,6 +115,7 @@ namespace AZ
             m_ownMemoryBlock[i] = false;
         }
 
+        AZ_Assert(m_desc.m_numMemoryBlocks > 0, "At least one memory block is required");
         for (int i = 0; i < m_desc.m_numMemoryBlocks; ++i)
         {
             if (m_desc.m_memoryBlocks[i] == nullptr)  // Allocate memory block if requested!
@@ -131,17 +132,6 @@ namespace AZ
 
             m_capacity += m_desc.m_memoryBlocksByteSize[i];
         }
-
-        if (m_desc.m_numMemoryBlocks == 0)
-        {
-            // Create default memory space if we can to serve for default allocations
-            m_memSpaces[0] = AZDLMalloc::create_mspace(0, m_desc.m_isMultithreadAlloc);
-            if (m_memSpaces[0])
-            {
-                AZDLMalloc::mspace_az_set_expandable(m_memSpaces[0], true);
-                m_capacity = Platform::GetHeapCapacity();
-            }
-        }
     }
 
     HeapSchema::~HeapSchema()

Code/Framework/AzCore/AzCore/Memory/HeapSchema.h

@@ -32,17 +32,11 @@ namespace AZ
          */
         struct Descriptor
         {
-            Descriptor()
-                : m_numMemoryBlocks(0)
-                , m_isMultithreadAlloc(true)
-            {}
-
-            static const int        m_memoryBlockAlignment = 64 * 1024;
             static const int        m_maxNumBlocks = 5;
-            int                     m_numMemoryBlocks;                          ///< Number of memory blocks to use.
-            void*                   m_memoryBlocks[m_maxNumBlocks];             ///< Pointers to provided memory blocks or NULL if you want the system to allocate them for you with the System Allocator.
-            size_t                  m_memoryBlocksByteSize[m_maxNumBlocks];     ///< Sizes of different memory blocks, if m_memoryBlock is 0 the block will be allocated for you with the System Allocator.
-            bool                    m_isMultithreadAlloc;                       ///< Set to true to enable multi threading safe allocation.
+            int                     m_numMemoryBlocks = 1;                      ///< Number of memory blocks to use.
+            void*                   m_memoryBlocks[m_maxNumBlocks] = {};        ///< Pointers to provided memory blocks or NULL if you want the system to allocate them for you with the System Allocator.
+            size_t                  m_memoryBlocksByteSize[m_maxNumBlocks] = {4 * 1024}; ///< Sizes of different memory blocks, if m_memoryBlock is 0 the block will be allocated for you with the System Allocator.
+            bool                    m_isMultithreadAlloc = true;                ///< Set to true to enable multi threading safe allocation.
         };
 
         HeapSchema(const Descriptor& desc);