Function alloc

kernels/subdiv/tessellation_cache.h:275–284

			      const unsigned int users);
    
   __forceinline size_t alloc(const size_t blocks)
   {
     if (unlikely(blocks >= switch_block_threshold))
       throw_RTCError(RTC_ERROR_INVALID_OPERATION,"allocation exceeds size of tessellation cache segment");

     assert(blocks < switch_block_threshold);
     size_t index = next_block.fetch_add(blocks);
     if (unlikely(index + blocks >= switch_block_threshold)) return (size_t)-1;
     return index;
   }

   static __forceinline void* malloc(const size_t bytes)
   {