OUT PHANDLE IoCompletionHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes OPTIONAL,
IN ULONG NumberOfConcurrentThreads );
Function NtCreateIoCompletion creates IO Completion Object. IO Completion Object is used for waiting on pending IO operation (reading or writing) in multi-process file access. It contains more informations about IO operation than synchronization event or APC Routine.
IoCompletionHandle
Result of call - HANDLE to newly created IO Completion Object.
DesiredAccess
Access mask for created HANDLE. Can be combination of:
IO_COMPLETION_QUERY_STATE
IO_COMPLETION_MODIFY_STATE
IO_COMPLETION_ALL_ACCESS
ObjectAttributes
Optionally contains object name, in Objects Namespace.
NumberOfConcurrentThreads
Number of threads accessing File Object associated with IO Completion. If Zero, system reserves memory for number of threads equal to current nymber of processes.
