New Utilities

Release 0.6.0-Preview.3

STPSmartStream

• Add a smart CUDA stream manager that utilises RAII techniques -- create a stream at construction, destroy the stream at destruction.
• Implement smart stream from unique_ptr such that the object can only be moved.
• Implement custom cast operator to cast STPSmartStream to cudaStream_t implicitly so no codebase needs to be changed.

STPPinnedMemoryPool

• Implement a new memory pool system dedicated for pinned memory.
• Memory is managed by smart pointer.
• Implement memory header which contains information about the allocated memory while external user is completely unaware of that, which makes returning memory back to the pool easier.
• Make pinned memory pool thread safe.

General fixes and improvement

• Deprecate STPMemoryPool in SuperTerrain+ Utility.
• STPFreeSlipTextureBuffer now uses STPPinnedMemoryPool for pinned memory allocation.
• Change the argument in filter execution call in STPSingleHistogramFilter to STPFreeSlipManager for data safety.