* 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
* 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,
* 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@
*/
-
+
#include "IOPMPowerStateQueue.h"
-#include "IOKit/IOLocks.h"
-#undef super
+
#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;
}
projects / apple / xnu.git / blobdiff