118 lines
2.6 KiB
C++
118 lines
2.6 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/ke/event.cc
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* DESCRIPTION: Kernel events support
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.hh>
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/**
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* Clears the signal state of the event.
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*
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* @param Event
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* Supplies a pointer to the event object.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KE::Event::ClearEvent(IN PKEVENT Event)
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{
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/* Clear event's signal state */
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Event->Header.SignalState = FALSE;
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}
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/**
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* Initializes a kernel event.
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*
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* @param Event
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* Supplies a pointer to the event object.
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*
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* @param EventType
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* Specifies an event type.
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*
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* @param InitialState
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* Specifies the initial signal state of the event.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KE::Event::InitializeEvent(OUT PKEVENT Event,
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IN KEVENT_TYPE EventType,
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IN BOOLEAN InitialState)
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{
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/* Initialize event dispatcher header */
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Event->Header.Type = EventType;
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Event->Header.SignalState = InitialState;
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/* Initialize event wait list */
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RtlInitializeListHead(&Event->Header.WaitListHead);
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}
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/**
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* Sets new signal state and satisfy waits if possible.
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*
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* @param Event
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* Supplies a pointer to the event object.
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*
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* @param Increment
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* Specifies an event priority boost value.
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*
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* @param Wait
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* Specifies whether to call kernel wait routines or not.
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*
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* @return This routine returns the previous signal state of the event.
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*
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* @since XT 1.0
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*/
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XTAPI
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LONG
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KE::Event::SetEvent(IN PKEVENT Event,
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IN KPRIORITY Increment,
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IN BOOLEAN Wait)
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{
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UNIMPLEMENTED;
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return 0;
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}
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/**
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* Sets an event to the signaled state and attempts to boost the priority of the waiting thread.
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*
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* @param Event
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* Supplies a pointer to the dispatcher object (Event) to be signaled.
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*
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* @param WaitingThread
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* supplies an optional pointer to a variable that receives the unblocked thread.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KE::Event::SetEventBoostPriority(IN PKEVENT Event,
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IN OUT PKTHREAD* WaitingThread)
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{
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/* Not implemented, active polling only */
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UNIMPLEMENTED;
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/* Set the signal state */
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Event->Header.SignalState = 1;
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/* Check if the caller requested the unblocked thread */
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if(WaitingThread != NULLPTR)
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{
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/* Return NULLPTR for now */
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*WaitingThread = NULLPTR;
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}
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}
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