Undocumented functions of NTDLL

2OO1, 18 February


Gridstore - NonStop Storage

NtQueryIoCompletion
NtQueryIoCompletion

NTSYSAPI 
NTSTATUS
NTAPI

NtQueryIoCompletion(


  IN HANDLE               IoCompletionHandle,
  IN IO_COMPLETION_INFORMATION_CLASS InformationClass,
  OUT PVOID               IoCompletionInformation,
  IN ULONG                InformationBufferLength,
  OUT PULONG              RequiredLength OPTIONAL );



Function NtQueryIoCompletion receives number of file operations pending on specified IO Completion Object.


  • IoCompletionHandle
    •     HANDLE to IO Completion Object opened with IO_COMPLETION_QUERY_STATE access.
  • InformationClass
    •     See IO_COMPLETION_INFORMATION_CLASS for possible values.
  • IoCompletionInformation
    •     User's allocated buffer for result data.
  • InformationBufferLength
    •     Length of IoCompletionInformation buffer, in bytes.
  • RequiredLength
    •     Optionally receives required length of buffer.


    Documented by:
    Tomasz Nowak



    Requirements:
    Library: ntdll.lib


    See also:
    IO_COMPLETION_INFORMATION_CLASS
    NtCreateIoCompletion
    NtOpenIoCompletion
    NtRemoveIoCompletion
    NtSetIoCompletion