NtCreateMutant - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtCreateMutant(
    _Out_ PHANDLE MutantHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_opt_ PCOBJECT_ATTRIBUTES ObjectAttributes,
    _In_ BOOLEAN InitialOwner
    );

#endif
#endif

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#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwCreateMutant(
    _Out_ PHANDLE MutantHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_opt_ PCOBJECT_ATTRIBUTES ObjectAttributes,
    _In_ BOOLEAN InitialOwner
    );

#endif

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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.

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See also

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