xnu-6153.11.26.tar.gz

[apple/xnu.git] / iokit / Kernel / IOPMPowerStateQueue.cpp

diff --git a/iokit/Kernel/IOPMPowerStateQueue.cpp b/iokit/Kernel/IOPMPowerStateQueue.cpp
index dee1aff49e092f487b985a07428d8a0c1bf9946a..fc106dc1a0e19923f8ea5039ea2cc4f4674b8e12 100644 (file)
--- a/iokit/Kernel/IOPMPowerStateQueue.cpp
+++ b/iokit/Kernel/IOPMPowerStateQueue.cpp
@@ -2,7 +2,7 @@
  * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * Copyright (c) 2001-2002 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
  * 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


@@ -11,10 +11,10 @@
  * 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.
  * 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.
  * 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,
  * 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,


@@ -22,169 +22,87 @@
  * 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.
  * 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@
  */
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */

- 
+

 #include "IOPMPowerStateQueue.h"
 #include "IOPMPowerStateQueue.h"

-#include "IOKit/IOLocks.h"
-#undef super
+

 #define super IOEventSource
 #define super IOEventSource

-OSDefineMetaClassAndStructors(IOPMPowerStateQueue, IOEventSource);
-
-#ifndef __ppc__ /* ppc does this right and doesn't need these routines */
-static
-void * OSDequeueAtomic(void * volatile * inList, SInt32 inOffset)
-{      
-       /* The _pointer_ is volatile, not the listhead itself */
-       void * volatile oldListHead;
-       void * volatile newListHead;
-
-       do {
-               oldListHead = *inList;
-               if (oldListHead == NULL) {
-                       break;
-               }
-               
-               newListHead = *(void * volatile *) (((char *) oldListHead) + inOffset);
-       } while (! OSCompareAndSwap((UInt32)oldListHead,
-                                       (UInt32)newListHead, (volatile UInt32 *)inList));
-       return oldListHead;
-}
+OSDefineMetaClassAndStructors( IOPMPowerStateQueue, IOEventSource )

 
 

-static
-void   OSEnqueueAtomic(void * volatile * inList, void * inNewLink, SInt32 inOffset)
+IOPMPowerStateQueue * IOPMPowerStateQueue::PMPowerStateQueue(
+       OSObject * inOwner, Action inAction )

 {
 {

-       /* The _pointer_ is volatile, not the listhead itself */
-       void *  volatile oldListHead;
-       void *  volatile newListHead = inNewLink;
-       void * volatile *       newLinkNextPtr = (void * volatile *) (((char *) inNewLink) + inOffset);
-
-       do {
-               oldListHead = *inList;
-               *newLinkNextPtr = oldListHead;
-       } while (! OSCompareAndSwap((UInt32)oldListHead, (UInt32)newListHead,
-                                       (volatile UInt32 *)inList));
-}
-#endif /* ! __ppc__ */
+       IOPMPowerStateQueue * me = new IOPMPowerStateQueue;

 
 

+       if (me && !me->init(inOwner, inAction)) {
+               me->release();
+               return NULL;
+       }
+
+       return me;
+}

 
 

-IOPMPowerStateQueue *IOPMPowerStateQueue::PMPowerStateQueue(OSObject *inOwner)
+bool
+IOPMPowerStateQueue::init( OSObject * inOwner, Action inAction )

 {
 {

-    IOPMPowerStateQueue     *me = new IOPMPowerStateQueue;
+       if (!inAction || !(super::init(inOwner, inAction))) {
+               return false;
+       }

 
 

-    if(me && !me->init(inOwner, 0) )
-    {
-        me->release();
-        return NULL;
-    }
+       queue_init( &queueHead );

 
 

-    return me;
+       queueLock = IOLockAlloc();
+       if (!queueLock) {
+               return false;
+       }
+
+       return true;

 }
 
 }
 

-bool IOPMPowerStateQueue::init(OSObject *owner, Action action)
+bool
+IOPMPowerStateQueue::submitPowerEvent(
+       uint32_t eventType,
+       void *   arg0,
+       uint64_t arg1 )

 {
 {

-    if(!(super::init(owner, (IOEventSource::Action) action))) return false;
-
-    // Queue of powerstate changes
-    changes = NULL;
-#ifndef __ppc__
-    if (!(tmpLock = IOLockAlloc()))  panic("IOPMPowerStateQueue::init can't alloc lock");
-#endif
-    return true;
-}
+       PowerEventEntry * entry;

 
 

+       entry = IONew(PowerEventEntry, 1);
+       if (!entry) {
+               return false;
+       }

 
 

-bool IOPMPowerStateQueue::unIdleOccurred(IOService *inTarget, unsigned long inState)
-{
-    PowerChangeEntry             *new_one = NULL;
-
-    new_one = (PowerChangeEntry *)IOMalloc(sizeof(PowerChangeEntry));
-    if(!new_one) return false;
-    
-    new_one->actionType = IOPMPowerStateQueue::kUnIdle;
-    new_one->state = inState;
-    new_one->target = inTarget;
-    
-    // Change to queue
-#ifndef __ppc__
-    IOLockLock(tmpLock);
-#endif
-    OSEnqueueAtomic((void **)&changes, (void *)new_one, 0);
-#ifndef __ppc__
-    IOLockUnlock(tmpLock);
-#endif
-    signalWorkAvailable();
-
-    return true;
+       entry->eventType = eventType;
+       entry->arg0 = arg0;
+       entry->arg1 = arg1;
+
+       IOLockLock(queueLock);
+       queue_enter(&queueHead, entry, PowerEventEntry *, chain);
+       IOLockUnlock(queueLock);
+       signalWorkAvailable();
+
+       return true;

 }
 
 }
 

-bool IOPMPowerStateQueue::featureChangeOccurred(
-    uint32_t inState, 
-    IOService *inTarget)
+bool
+IOPMPowerStateQueue::checkForWork( void )

 {
 {

-    PowerChangeEntry             *new_one = NULL;
-
-    new_one = (PowerChangeEntry *)IOMalloc(sizeof(PowerChangeEntry));
-    if(!new_one) return false;
-    
-    new_one->actionType = IOPMPowerStateQueue::kPMFeatureChange;
-    new_one->state = inState;
-    new_one->target = inTarget;
-    
-    // Change to queue
-#ifdef __i386__
-    IOLockLock(tmpLock);
-#endif
-    OSEnqueueAtomic((void **)&changes, (void *)new_one, 0);
-#ifdef __i386__
-    IOLockUnlock(tmpLock);
-#endif
-    signalWorkAvailable();
-
-    return true;
-}
+       IOPMPowerStateQueueAction queueAction = (IOPMPowerStateQueueAction) action;
+       PowerEventEntry * entry;

 
 

+       IOLockLock(queueLock);
+       while (!queue_empty(&queueHead)) {
+               queue_remove_first(&queueHead, entry, PowerEventEntry *, chain);
+               IOLockUnlock(queueLock);

 
 

-// checkForWork() is called in a gated context
-bool IOPMPowerStateQueue::checkForWork()
-{
-    PowerChangeEntry            *theNode;
-    uint32_t                    theState;
-    IOService                   *theTarget;
-    uint16_t                    theAction;
-    
-    // Dequeue and process the state change request
-#ifndef __ppc__
-    IOLockLock(tmpLock);
-#endif
-    if((theNode = (PowerChangeEntry *)OSDequeueAtomic((void **)&changes, 0)))
-    {
-#ifndef __ppc__
-      IOLockUnlock(tmpLock);
-#endif
-        theState = theNode->state;
-        theTarget = theNode->target;
-        theAction = theNode->actionType;
-        IOFree((void *)theNode, sizeof(PowerChangeEntry));
-        
-        switch (theAction)
-        {
-            case kUnIdle:
-                theTarget->command_received((void *)theState, 0, 0, 0);
-                break;
-                
-            case kPMFeatureChange:
-                theTarget->messageClients(theState, theTarget);
-                break;
-        }
-    }
-#ifndef __ppc__
-    else {
-      IOLockUnlock(tmpLock);
-    }
-#endif
-    // Return true if there's more work to be done
-    if(changes) return true;
-    else return false;
+               (*queueAction)(owner, entry->eventType, entry->arg0, entry->arg1);
+               IODelete(entry, PowerEventEntry, 1);
+
+               IOLockLock(queueLock);
+       }
+       IOLockUnlock(queueLock);
+
+       return false;

 }
 }