/*

File:SCSIEmulatorEventSource.cpp

Abstract: Implementaion of an IOEventSource subclass used to respond to

        SCSI tasks on the IOSCSIParallelInterfaceController workloop

Version: 1.0

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*/

#include "SCSIEmulatorEventSource.h"

#include "SCSIEmulatorAdapter.h"

// Define superclass

#define super IOEventSource

// REQUIRED! This macro defines the class's constructors, destructors,

// and several other methods I/O Kit requires. Do NOT use super as the

// second parameter. You must use the literal name of the superclass.

OSDefineMetaClassAndStructors(com_apple_dts_SCSIEmulatorEventSource, IOEventSource)

bool com_apple_dts_SCSIEmulatorEventSource::init(com_apple_dts_SCSIEmulatorAdapter *ourAdapter, com_apple_dts_SCSIEmulatorEventSource::Action action)

{

    bool res = super::init(ourAdapter, (IOEventSource::Action) action);

    if (res) {

        queue_init(&mResponderQueue);

    } else {

        IOLog("SCSIEmulatorEventSource: failed super::init()\n");

    }

    return res;

}

void com_apple_dts_SCSIEmulatorEventSource::free(void)

{

    super::free();

}

bool com_apple_dts_SCSIEmulatorEventSource::addItemToQueue(SCSIEmulatorRequestBlock* elem)

{

    closeGate();

    queue_enter(&mResponderQueue, elem, SCSIEmulatorRequestBlock *, fQueueChain);

    openGate();

    signalWorkAvailable();

    return true;

}

bool com_apple_dts_SCSIEmulatorEventSource::checkForWork()

{

    SCSIEmulatorRequestBlock* elem = NULL;

    while (!queue_empty(&mResponderQueue)) {

        queue_remove_first(&mResponderQueue, elem, SCSIEmulatorRequestBlock *, fQueueChain);

        if (action && owner && elem) {

            (*action)(owner, *elem);

        }

    };

    return (!queue_empty(&mResponderQueue));

}