Synchronization and atomics chapter desing

[PetroBondar]

Currently, the "Atomic Operations" chapter looks like this:

We propose to rename this chapter to "Synchronization and atomics" and implement the following structure:

• Synchronization and atomics
  • Barriers and fences (4.15.1. Barriers and fences)
  • sycl::device_event (4.15.2. device_event class)
  • Atomic references (4.15.3. Atomic references)
  • Interaction with host code (4.15.5. Interaction with host code)

Also, should we include deprecated Atomic types in the reference guide?

We will create the PR with updates soon. Feel free to comment if you have any suggestions on the structure.

[PetroBondar]

Created PR: #126

[mkinsner]

Also, should we include deprecated Atomic types in the reference guide?

Yes, because the deprecated features are still in the specification and need to be supported, they should be in the reference guide.