RTL_PROCESS_LOCKS

The RTL_PROCESS_LOCKS structure is what a successful call to ZwQuerySystemInformation or NtQuerySystemInformation produces in its output buffer when given the information class SystemLocksInformation (0x0C).

Documentation Status

The RTL_PROCESS_LOCKS structure is not documented.

Microsoft does publish the practical equivalent of a C-language definition as type information in public symbol files, though not for the kernel, where the structure is prepared, nor even for low-level user-mode DLLs that interpret the structure, but for various higher-level user-mode DLLs such as URLMON.DLL and only then starting with version 6.2.

Two earlier disclosures of type information are known, though not in symbol files but in statically linked libraries: GDISRVL.LIB from the Device Driver Kit (DDK) for Windows NT 3.51; and SHELL32.LIB from the DDK for Windows NT 4.0.

Layout

The RTL_PROCESS_LOCKS is 0x28 or 0x38 bytes in 32-bit and 64-bit Windows, respectively.

ULONG NumberOfLocks;

RTL_PROCESS_LOCK_INFORMATION Locks [ANYSIZE_ARRAY];