External Memory & Synchronization Abstraction Library

This project uses vcpkg for all dependencies. Ensure VCPKG_ROOT points to your vcpkg installation and that the required packages from vcpkg.json are installed. Configure and build using one of the presets defined in CMakePresets.json:

cmake --preset x64-osx-ninja-debug
cmake --build --preset x64-osx-ninja-debug

The header june.h exposes a minimal C interface for working with external GPU resources. Highlights include:

• Unified handling of external memory and synchronization primitives.
• Support for Vulkan, D3D11, D3D12, OpenGL, GLES and Metal backends.
• Opaque handles for instances, API contexts, shared memory and fences.
• Descriptor structures use a JuneChainedStruct header so additional platform specific information can be chained when required.
• Resources such as Vulkan buffers or EGL images can be created from imported memory.
• Shared memory is always imported from platform handles and cannot be created directly by the library.
• Fence objects are created and reset using imported synchronization handles (e.g. EGLSync or SyncFD) and can be exported to synchronize work between different APIs.
• Platform-specific extensions cover handles like AHardwareBuffer, DMABuf, IOSurface and fences such as MTLSharedFence.