NtPulseEvent - 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
NtPulseEvent(
    _In_ HANDLE EventHandle,
    _Out_opt_ PLONG PreviousState
    );

#endif
#endif

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#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwPulseEvent(
    _In_ HANDLE EventHandle,
    _Out_opt_ PLONG PreviousState
    );

#endif

View code on GitHub

EventHandle

HANDLE to Event Object opened with EVENT_MODIFY_STATE access.

PreviousState

State of event before call.

Function sets event to signaled state, releases all (or one - depending on EVENT_TYPE) waiting threads, and resets event to non-signaled state. If they're no waiting threads, NtPulseEvent just clear event state.

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See also

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