Synchronization

[ProGTX]

Already mentioned in #6

Parts to implement per §2.5.5:

• :warning: Buffer destruction
  • :white_check_mark: Wait on events in destructor
  • :red_circle: #9, copying, smart pointers
• :white_check_mark: Accessor construction
  • :white_check_mark: Device accessors
  • Through #14
  • :white_check_mark: Host accessors
• :white_check_mark: Command group enqueue

  • 14

• :warning: Interaction with OpenCL synchronization operations
  • I'm not sure what this is supposed to entail with regard to buffer and image. Maybe mutex?
  • :warning: handler_event from queue.
• :white_check_mark: Queue destruction
• :warning: Context destruction
  • Not high priority, problems with copies and moves.
• :warning: SYCL event objects
  • :red_circle: #9

[ProGTX]

"Command group enqueue", or intra-queue synchronization, was done alongside #14.

[ProGTX]

Host accessors synchronized with synchronizer class (see #1).

[ProGTX]

Forgot to take into account that host accessors block the queue for their whole lifetime, and just synchronization on construction isn't enough. Fixed in d25b7f55dd1161bca49fef66fcb64bca0b6a952e.