The changes are as follows:
* Moved the code around to fit with the ordering system
* Added a function to get available cpu cores
* Renamed variables with _ in front of them
* Added mutexes and lock guards for the getters and setters of the max concurrency and result variables
* Made max concurrency dynamic by returning 0 when the operation is finished
MVKConfigLogLevel, MVKConfigTraceVulkanCalls, and MVKConfigAutoGPUCaptureScope
do not need to be VkFlags, since they aren't bitwise flags.
MVK_SET_FROM_ENV_OR_BUILD_INT32 supports setting enumerated values.
Add MVKConfiguration::apiVersionToAdvertise and MVK_CONFIG_API_VERSION_TO_ADVERTISE
env var to configure MoltenVK to advertise a particular Vulkan version.
Advertise MVKConfiguration::apiVersionToAdvertise in:
vkEnumerateInstanceVersion()
vkGetPhysicalDeviceProperties()
vkEnumerateInstanceLayerProperties()
vkEnumerateDeviceLayerProperties()
Add MVKConfiguration::advertiseExtensions and MVK_CONFIG_ADVERTISE_EXTENSIONS
env var to configure MoltenVK to not advertise support for any Vulkan extensions.
Refactor population of MVKConfiguration from environment variables to better
support validating and baking config values set by app.
Update MoltenVK version to 1.1.3.
Update VK_MVK_MOLTENVK_SPEC_VERSION to 31.
Generally replace use of @available() with respondsToSelector:.
Add mvkMakeOSVersion() and mvkOSVersionIsAtLeast(macos,ios) to help testing OS versions.
Set maxDrawIndexedIndexValue to kMVKUndefinedLargeUInt32 instead of uint32_t max.
Use MVK_CONFIG_AUTO_GPU_CAPTURE_OUTPUT_FILE to set the destination file.
This is useful for capturing traces where the program in question cannot
be run under Xcode's control; the captured trace can then be inspected
later with Xcode.
This new feature requires Metal 3.0 (macOS 10.15, iOS 13).
This is the heap representing system memory. The memory type
corresponding to `MTLStorageModeShared` is reported as belonging to this
heap.
I've tried to correct the reported size of the heaps as well while I'm
at it. UMA GPUs and the system heap for NUMA GPUs use the system memory
size as the heap size, and the amount of available memory as the budget.
iOS 13 uses the new `os_proc_available_memory()` API for this purpose.
NUMA GPUs additionally use the memory used by the process as a crude
measure of system heap usage.
