struct dxgsyncobject
struct dxgsyncobject is the GPU synchronization object which is used to synchronize execution between GPU contextx/hardware queues or for tracking GPU execution progress.
A dxgsyncobject is created when somebody creates a syncobject or opens a shared syncobject.
A syncobject belongs to an adapter, unless it is a cross-adapter object.
Cross adapter syncobjects are currently not implemented.
D3DDDI_MONITORED_FENCE and D3DDDI_PERIODIC_MONITORED_FENCE are called "device" syncobject, because the belong to a device (dxgdevice). Device syncobjects are inserted to a list in dxgdevice.
A syncobject can be «shared», meaning that it could be opened by many processes.
Shared syncobjects are inserted to a list in its owner (dxgsharedsyncobject).
A syncobject can be shared by using a global handle or by using NT security handle.
When global handle sharing is used, the handle is created durinig object creation.
When "NT security" is used, the handle for sharing is create be calling dxgk_share_objects. On Linux "NT handle" is represented by a file descriptor. FD points to dxgsharedsyncobject.