/*  Copyright © 2007 Apple Inc. All Rights Reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by 

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            following terms, and your use, installation, modification or

            redistribution of this Apple software constitutes acceptance of these

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            subject to these terms, Apple grants you a personal, non-exclusive

            license, under Apple's copyrights in this original Apple software (the

            "Apple Software"), to use, reproduce, modify and redistribute the Apple

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            provided that if you redistribute the Apple Software in its entirety and

            without modifications, you must retain this notice and the following

            text and disclaimers in all such redistributions of the Apple Software. 

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            may be used to endorse or promote products derived from the Apple

            Software without specific prior written permission from Apple.  Except

            as expressly stated in this notice, no other rights or licenses, express

            or implied, are granted by Apple herein, including but not limited to

            any patent rights that may be infringed by your derivative works or by

            other works in which the Apple Software may be incorporated.

            The Apple Software is provided by Apple on an "AS IS" basis.  APPLE

            MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

            THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS

            FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

            OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

            IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL

            OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

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*/

extern "C" {

#include <mach/mach.h>

};

#include "IOServiceClient.h"

#include <unistd.h>

#if DEBUG

    #include <stdio.h>

    //#define VERBOSE 1

#endif

// _________________________________________________________________________________________

//  IOServiceClient::IOServiceClient

//

IOServiceClient::IOServiceClient(CFRunLoopRef notifyRunLoop, CFMutableDictionaryRef matchingDict) :

    mRunLoop(notifyRunLoop)

{

    mMasterDevicePort = 0;

    mNotifyPort = NULL;

    mRunLoopSource = NULL;

    mServicePublishIterator = 0;

    mServiceTerminateIterator = 0;

    mIteratorsNeedEmptying = false;

    mMatchingDict = matchingDict;

    // This gets the master device mach port through which all messages

    // to the kernel go, and initiates communication with IOKit.

    require_noerr(IOMasterPort(MACH_PORT_NULL, &mMasterDevicePort), errexit);

    if (mRunLoop) {

        mNotifyPort = IONotificationPortCreate(mMasterDevicePort);

        require(mNotifyPort != NULL, errexit);

        mRunLoopSource = IONotificationPortGetRunLoopSource(mNotifyPort);

        require(mRunLoopSource != NULL, errexit);

        CFRunLoopAddSource(mRunLoop, mRunLoopSource, kCFRunLoopDefaultMode);

        CFRetain(mMatchingDict);

        require_noerr(IOServiceAddMatchingNotification(mNotifyPort, kIOPublishNotification, mMatchingDict, ServicePublishCallback, this, &mServicePublishIterator), errexit);

        CFRetain(mMatchingDict);

        require_noerr(IOServiceAddMatchingNotification(mNotifyPort, kIOTerminatedNotification, mMatchingDict, ServiceTerminateCallback, this, &mServiceTerminateIterator), errexit);

        // signal that the first call to ScanServices needs to empty the publish/terminate iterators

        mIteratorsNeedEmptying = true;

    }

errexit:

    ;

}

// _________________________________________________________________________________________

//  IOServiceClient::~IOServiceClient

//

IOServiceClient::~IOServiceClient()

{

    if (mRunLoop != NULL && mRunLoopSource != NULL)

        CFRunLoopRemoveSource(mRunLoop, mRunLoopSource, kCFRunLoopDefaultMode);

    if (mRunLoopSource != NULL)

        CFRelease(mRunLoopSource);

    if (mServicePublishIterator != 0)

        IOObjectRelease(mServicePublishIterator);

    if (mServiceTerminateIterator != 0)

        IOObjectRelease(mServiceTerminateIterator);

    //if (mNotifyPort)

    //  IOObjectRelease(mNotifyPort);   // IONotificationPortDestroy crashes if called twice!

    if (mMasterDevicePort)

        mach_port_deallocate(mach_task_self(), mMasterDevicePort);

    if (mMatchingDict)

        CFRelease(mMatchingDict);

}

// _________________________________________________________________________________________

//  IOServiceClient::ServicePublishCallback

//

void        IOServiceClient::ServicePublishCallback(void *refcon, io_iterator_t it)

{

    ((IOServiceClient *)refcon)->ServicesPublished(it);

}

// _________________________________________________________________________________________

//  IOServiceClient::ServiceTerminateCallback

//

void        IOServiceClient::ServiceTerminateCallback(void *refcon, io_iterator_t it)

{

    ((IOServiceClient *)refcon)->ServicesTerminated(it);

}

// _________________________________________________________________________________________

//  IOServiceClient::ScanServices

//

void    IOServiceClient::ScanServices()

{

    if (mMasterDevicePort == 0)

        return;

    if (mIteratorsNeedEmptying) {

        mIteratorsNeedEmptying = false;

        ServicesPublished(mServicePublishIterator);

        ServicesTerminated(mServiceTerminateIterator);

        return;

    }

    io_iterator_t iter = 0;

    CFRetain(mMatchingDict);

    require_noerr(IOServiceGetMatchingServices(mMasterDevicePort, mMatchingDict, &iter), errexit);

    ServicesPublished(iter);

errexit:

    if (iter != 0)

        IOObjectRelease(iter);

}

// _________________________________________________________________________________________

//  IOServiceClient::ServicesPublished

//

void    IOServiceClient::ServicesPublished(io_iterator_t serviceIterator)

{

    io_service_t    ioServiceObj = 0;

    usleep(100 * 1000); // 100 ms - defense against our doing anything

                        // before IOUSBFamily gets a chance to construct

                        // a user client [2877002]

    while ((ioServiceObj = IOIteratorNext(serviceIterator)) != 0) {

        ServicePublished(ioServiceObj);

        IOObjectRelease(ioServiceObj);

    }

}

// _________________________________________________________________________________________

//  IOServiceClient::ServicesTerminated

//

void    IOServiceClient::ServicesTerminated(io_iterator_t serviceIterator)

{

    io_service_t    ioServiceObj = 0;

    while ((ioServiceObj = IOIteratorNext(serviceIterator)) != 0) {

        ServiceTerminated(ioServiceObj);

        IOObjectRelease(ioServiceObj);

    }

}