FreeBSD/Linux Kernel Cross Reference
sys/iokit/IOKit/IOCommandQueue.h

     /*
      * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
      * Version 2.0 (the 'License'). You may not use this file except in
      * compliance with the License. The rights granted to you under the License
     * may not be used to create, or enable the creation or redistribution of,
     * unlawful or unlicensed copies of an Apple operating system, or to
     * circumvent, violate, or enable the circumvention or violation of, any
     * terms of an Apple operating system software license agreement.
     * 
     * Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
    /*
    Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
    
    HISTORY
        1998-7-13   Godfrey van der Linden(gvdl)
            Created.
        1998-10-30  Godfrey van der Linden(gvdl)
            Converted to C++
        1999-9-22   Godfrey van der Linden(gvdl)
            Deprecated
    ]*/
    #ifndef _IOKIT_IOCOMMANDQUEUE_H
    #define _IOKIT_IOCOMMANDQUEUE_H
    
    #include <IOKit/IOEventSource.h>
    
    
    #define DEPRECATED __attribute__((deprecated))
    
    class IOCommandQueue;
    
    typedef void (*IOCommandQueueAction)
        (OSObject *, void *field0, void *field1, void *field2, void *field3);
    
    class IOCommandQueue : public IOEventSource
    {
        OSDeclareDefaultStructors(IOCommandQueue)
    
    protected:
        static const int kIOCQDefaultSize = 128;
    
        void *queue;
        IOLock *producerLock;
        semaphore_port_t producerSema;
        int producerIndex, consumerIndex;
        int size;
    
        virtual void free();
    
        virtual bool checkForWork();
    
    public:
        static IOCommandQueue *commandQueue(OSObject *inOwner,
                                            IOCommandQueueAction inAction = 0,
                                            int inSize = kIOCQDefaultSize) 
            DEPRECATED;
        virtual bool init(OSObject *inOwner,
                          IOCommandQueueAction inAction = 0,
                          int inSize = kIOCQDefaultSize)
            DEPRECATED;
    
        virtual kern_return_t enqueueCommand(bool gotoSleep = true,
                                             void *field0 = 0, void *field1 = 0,
                                             void *field2 = 0, void *field3 = 0)
            DEPRECATED;
    
        // WARNING:  This function can only be safely called from the appropriate
        // work loop context.  You should check IOWorkLoop::onThread is true.
        //
        // For each entry in the commandQueue call the target/action.
        // Lockout all new entries to the queue while iterating.
        // If the input fields are zero then the queue's owner/action will be used.
        virtual int performAndFlush(OSObject *target = 0,
                                    IOCommandQueueAction inAction = 0)
            DEPRECATED;
    };
    
    #endif /* !_IOKIT_IOCOMMANDQUEUE_H */

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