d7e1e3e012
Most of the actual UserEvent work is done in DPC so that we don't have to care about the limitations of the context in which UserEvent::Fire() is invoked. This requires appropriate management of lifetime of UserEvent instances to make sure that DoDPC() method is always called on a valid object.
116 lines
2.1 KiB
C++
116 lines
2.1 KiB
C++
/*
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* Copyright 2014, Paweł Dziepak, pdziepak@quarnos.org.
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* Copyright 2011, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _KERNEL_USER_EVENT_H
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#define _KERNEL_USER_EVENT_H
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#include <signal.h>
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#include <SupportDefs.h>
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#include <DPC.h>
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#include <thread.h>
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namespace BKernel {
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struct Team;
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struct Thread;
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struct UserEvent : public BReferenceable {
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virtual ~UserEvent();
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virtual status_t Fire() = 0;
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};
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struct SignalEvent : UserEvent, private DPCCallback {
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virtual ~SignalEvent();
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void SetUserValue(union sigval userValue);
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virtual status_t Fire();
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protected:
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struct EventSignal;
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protected:
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SignalEvent(EventSignal* signal);
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protected:
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EventSignal* fSignal;
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int32 fPendingDPC;
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};
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struct TeamSignalEvent : SignalEvent {
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static TeamSignalEvent* Create(Team* team, uint32 signalNumber,
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int32 signalCode, int32 errorCode);
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protected:
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virtual void DoDPC(DPCQueue* queue);
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private:
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TeamSignalEvent(Team* team,
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EventSignal* signal);
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private:
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Team* fTeam;
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};
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struct ThreadSignalEvent : SignalEvent {
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static ThreadSignalEvent* Create(Thread* thread, uint32 signalNumber,
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int32 signalCode, int32 errorCode,
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pid_t sendingTeam);
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protected:
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virtual void DoDPC(DPCQueue* queue);
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private:
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ThreadSignalEvent(Thread* thread,
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EventSignal* signal);
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private:
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Thread* fThread;
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};
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struct CreateThreadEvent : UserEvent, private DPCCallback {
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~CreateThreadEvent();
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static CreateThreadEvent* Create(
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const ThreadCreationAttributes& attributes);
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virtual status_t Fire();
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private:
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CreateThreadEvent(
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const ThreadCreationAttributes& attributes);
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virtual void DoDPC(DPCQueue* queue);
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private:
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ThreadCreationAttributes fCreationAttributes;
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char fThreadName[B_OS_NAME_LENGTH];
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int32 fPendingDPC;
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};
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} // namespace BKernel
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using BKernel::CreateThreadEvent;
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using BKernel::SignalEvent;
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using BKernel::TeamSignalEvent;
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using BKernel::ThreadSignalEvent;
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using BKernel::UserEvent;
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#endif // _KERNEL_USER_EVENT_H
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