About the Matrixes

The matrixes provide technical information about the Support APIs for RTX64. Matrixes are provided for:

NOTE: APIs that are not explicitly documented as supported are not guaranteed to work. You should thoroughly test any code that uses undocumented functions.

Key

The following key explains the "Notes" column in the tables.

Code for Notes	Meaning
1	The priority spectrum of RTX64 is 0 to 127, whereas the Windows range is {-15, -2, -1, 0, 1, 2, 15} on Windows.
2	The RTX64 IPC namespace is separate from the Windows namespace.
3	The call is supported as both an Rt call and as a Windows call (for example, RtAtoi and Atoi).
Deterministic	No — The call is not deterministic. Yes —The elapsed time for the call is less than 5 microseconds. Deterministic functions in RTSS work at Windows STOP screens. Yes* — The call is deterministic for small input sizes Unknown — It is not possible to know if the call is deterministic because it is not always possible to know anything about the object that the call references.