Add support for buffer sharing from Vulkan to CUDA (#2008)

* Added getSharedHandle() and additional code to handle shareable buffer creation to Buffer::init() and initVulkanInstanceAndDevice() for Vulkan; Modified createBufferFromSharedHandle() in CUDA to assign externalMemoryHandleDesc.type based on the type of handle being provided; Added an additional test case to get-shared-handle.cpp testing Vulkan to CUDA

* Added createBufferFromNativeHandle() to Vulkan and enabled corresponding test

* disable cuda

* Fixed getSharedHandle() for D3D12 buffers assigning Win32 as the handle's source

* Removed a dangling comment inside Buffer::init()

* Added a missing override; Added code to check that a physical device supports the necessary external memory extensions before adding them to the deviceExtensions list; Added #if SLANG_WINDOWS_FAMILY guards around all Windows-specific code and sharedHandleVulkanToCUDA test (which uses said platform-specific code)

* Added Windows check around vkGetMemoryWin32HandleKHR in vk-api.h

* Added missing Windows check around BufferResourceImpl destructor

* Added a temporary hack to ensure synchronization between devices, which solves an issue with buffer sharing resulting in incorrect values being read back; Added #if SLANG_WIN64 around all CUDA tests as the backend currently only supports running CUDA on 64-bit (despite devices being created successfully in a 32-bit config)

1 files changed, 1 insertions, 2 deletions

diff --git a/tools/gfx-unit-test/existing-device-handle-test.cpp b/tools/gfx-unit-test/existing-device-handle-test.cpp
index d87090aa0..652a530af 100644
--- a/tools/gfx-unit-test/existing-device-handle-test.cpp
+++ b/tools/gfx-unit-test/existing-device-handle-test.cpp
@@ -141,8 +141,7 @@ namespace gfx_test
     {
         return existingDeviceHandleTestAPI(unitTestContext, Slang::RenderApiFlag::Vulkan);
     }
-#if 0
-    // Temporarily disabled due to inconsistent test results on TC
+#if SLANG_WIN64
     SLANG_UNIT_TEST(existingDeviceHandleCUDA)
     {
         return existingDeviceHandleTestAPI(unitTestContext, Slang::RenderApiFlag::CUDA);