Undocumented functions of NTDLL

2OOO, 24 November

NTSYSAPI 
NTSTATUS
NTAPI


NtCreateMutant(



  OUT PHANDLE             MutantHandle,
  IN ACCESS_MASK          DesiredAccess,
  IN POBJECT_ATTRIBUTES   ObjectAttributes OPTIONAL,
  IN BOOLEAN              InitialOwner );

MutantHandle

Result of function call - handle to newly created Mutant object.

DesiredAccess

In most cases there's MUTANT_ALL_ACCESS. See <WinNT.h> or <WinBase.h> for other information about Mutant objects access rights.

ObjectAttributes

May be used to creation named Mutant objects. Named Mutant can be used by more then one process.

InitialOwner

If TRUE, Mutant is created with non-signaled state. Caller should call NtReleaseMutant after program initialization.

Mutant object live in object namespace as long as at least one handle is still open. To destroy Mutant, just call NtClose with MutantHandle.

Documented by:

Tomasz Nowak

Sven B. Schreiber

Library: ntdll.lib

NtClose

NtOpenMutant