tree 9d24ba6a4b8f7b26bf4845f49b0cefb2f426942c
parent 99743c8f843c503461e5e6f2476a6c56752c4645
author Bill Hollings <bill.hollings@brenwill.com> 1567305453 -0400
committer Bill Hollings <bill.hollings@brenwill.com> 1567305453 -0400

Support optional use of MTLFence for Vulkan semaphores via the
MVK_ALLOW_METAL_FENCES environment variable.

Refactor MVKSemaphore class into separate MVKSemaphoreMTLFence,
MVKSemaphoreMTLEvent, and MVKSemaphoreEmulated subclasses.
Add MVK_ALLOW_METAL_FENCES environment variable to optionally
enable using MTLFence for Vulkan semaphores.
Add MVKPhysicalDeviceMetalFeatures::fences to track MTLFence availability.
Update VK_MVK_MOLTENVK_SPEC_VERSION to version 22.