+++ /dev/null
-/*
- * Copyright (c) 2001-2002 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_OSREFERENCE_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_LICENSE_OSREFERENCE_HEADER_END@
- */
-
-#include "IOPMWorkArbiter.h"
-#include "IOKit/IOLocks.h"
-#undef super
-#define super IOEventSource
-OSDefineMetaClassAndStructors(IOPMWorkArbiter, IOEventSource);
-
-/*************************************************************************/
-static
-void * _dequeue(void ** inList, SInt32 inOffset)
-{
- void * oldListHead;
- void * newListHead;
-
- do {
- oldListHead = *inList;
- if (oldListHead == NULL) {
- break;
- }
-
- newListHead = *(void **) (((char *) oldListHead) + inOffset);
- } while (! OSCompareAndSwap((UInt32)oldListHead,
- (UInt32)newListHead, (UInt32 *)inList));
- return oldListHead;
-}
-
-/*************************************************************************/
-static
-void _enqueue(void ** inList, void * inNewLink, SInt32 inOffset)
-{
- void * oldListHead;
- void * newListHead = inNewLink;
- void ** newLinkNextPtr = (void **) (((char *) inNewLink) + inOffset);
-
- do {
- oldListHead = *inList;
- *newLinkNextPtr = oldListHead;
- } while (! OSCompareAndSwap((UInt32)oldListHead, (UInt32)newListHead,
- (UInt32 *)inList));
-}
-
-/*************************************************************************/
-IOPMWorkArbiter *IOPMWorkArbiter::pmWorkArbiter(
- IOPMrootDomain *inOwner)
-{
- IOPMWorkArbiter *me = new IOPMWorkArbiter;
-
- if(me && !me->init((OSObject *)inOwner, 0) )
- {
- me->release();
- return NULL;
- }
-
- return me;
-}
-
-/*************************************************************************/
-bool IOPMWorkArbiter::init(OSObject *owner, Action action)
-{
- if(!(super::init(owner, (IOEventSource::Action) action)))
- return false;
-
- events = NULL;
- fRootDomain = (IOPMrootDomain *)owner;
-
- if (!(tmpLock = IOLockAlloc())) {
- panic("IOPMWorkArbiter::init can't alloc lock");
- }
- return true;
-}
-
-/*************************************************************************/
-bool IOPMWorkArbiter::driverAckedOccurred(IOService *inTarget)
-{
- PMEventEntry *new_one = NULL;
-
- new_one = (PMEventEntry *)IOMalloc(sizeof(PMEventEntry));
- if(!new_one) return false;
-
- new_one->actionType = IOPMWorkArbiter::kDriverAcked;
- new_one->target = inTarget;
-
- // Change to queue
- IOLockLock(tmpLock);
- _enqueue((void **)&events, (void *)new_one, 0);
- IOLockUnlock(tmpLock);
- signalWorkAvailable();
-
- return true;
-}
-
-/*************************************************************************/
-bool IOPMWorkArbiter::allAckedOccurred(IOService *inTarget)
-{
- PMEventEntry *new_one = NULL;
-
- new_one = (PMEventEntry *)IOMalloc(sizeof(PMEventEntry));
- if(!new_one) return false;
-
- new_one->actionType = IOPMWorkArbiter::kAllAcked;
- new_one->target = inTarget;
-
- // Change to queue
- IOLockLock(tmpLock);
- _enqueue((void **)&events, (void *)new_one, 0);
- IOLockUnlock(tmpLock);
- signalWorkAvailable();
-
- return true;
-}
-
-/*************************************************************************/
-bool IOPMWorkArbiter::clamshellStateChangeOccurred(uint32_t messageValue)
-{
- PMEventEntry *new_one = NULL;
-
- new_one = (PMEventEntry *)IOMalloc(sizeof(PMEventEntry));
- if(!new_one) return false;
-
- new_one->actionType = IOPMWorkArbiter::kRootDomainClamshellChanged;
- new_one->target = (IOService *)fRootDomain;
- new_one->intArgument = messageValue;
-
- IOLockLock(tmpLock);
- _enqueue((void **)&events, (void *)new_one, 0);
- IOLockUnlock(tmpLock);
- signalWorkAvailable();
-
- return true;
-}
-
-
-/*************************************************************************/
-void IOPMWorkArbiter::checkForWorkThreadFunc(void *refcon)
-{
- PMEventEntry *theNode = (PMEventEntry *)refcon;
- IOService *theTarget;
- UInt16 theAction;
-
- if(!theNode) return;
- theTarget = theNode->target;
- theAction = theNode->actionType;
- IOFree(theNode, sizeof(PMEventEntry));
- theNode = NULL;
-
- switch (theAction)
- {
- case kAllAcked:
- theTarget->all_acked_threaded();
- break;
-
- case kDriverAcked:
- theTarget->driver_acked_threaded();
- break;
- }
-
-}
-
-
-/*************************************************************************/
-// checkForWork() is called in a gated context
-bool IOPMWorkArbiter::checkForWork()
-{
- PMEventEntry *theNode;
- IOService *theTarget;
- UInt16 theAction;
-
- // Dequeue and process the state change request
- IOLockLock(tmpLock);
- if((theNode = (PMEventEntry *)_dequeue((void **)&events, 0)))
- {
- IOLockUnlock(tmpLock);
- theTarget = theNode->target;
- theAction = theNode->actionType;
- IOFree((void *)theNode, sizeof(PMEventEntry));
-
- switch (theAction)
- {
- case kAllAcked:
- theTarget->all_acked_threaded();
- break;
-
- case kDriverAcked:
- theTarget->driver_acked_threaded();
- break;
-
- case kRootDomainClamshellChanged:
- theTarget->messageClients(
- kIOPMMessageClamshellStateChange,
- (void *)theNode->intArgument);
- break;
- }
- }
- else {
- IOLockUnlock(tmpLock);
- }
- // Return true if there's more work to be done
- if(events) return true;
- else return false;
-}
-
-
-/*************************************************************************/
-
-/*************************************************************************/
-
-/*************************************************************************/
-
-/*************************************************************************/
-/*
-#undef super
-#define super OSObject
-
-PMWorkerThread *PMWorkerThread::workerThread( IOPMWorkArbiter *inArbiter )
-{
- PMWorkerThread * inst;
-
- if( !(inst = new PMWorkerThread) )
- goto exit;
-
- if( !inst->init() )
- goto exit;
-
- inst->arbiter = inArbiter;
-
- if( !(IOCreateThread((IOThreadFunc) &PMWorkerThread::main, inst)) )
- goto exit;
-
- return inst;
-
-exit:
- if(inst)
- inst->release();
-
- return NULL;
-}
-
-void PMWorkerThread::free( void )
-{
- super::free();
-}
-
-void PMWorkerThread::main( PMWorkerThread * self )
-{
- PMWorkUnit *job;
- IOService *who;
-
- do {
- // Get a new job
-
- IOTakeLock( gJobsLock );
-
- if( !(job = (PMWorkUnit *) gJobs->copyNextJob()) )
- {
- IOUnlock( gJobsLock );
- semaphore_wait( gJobsSemaphore );
- IOTakeLock( gJobsLock );
-
- job = (PMWorkUnit *) gJobs->copyNextJob();
- }
-
- IOUnlock( gJobsLock );
-
- if(job)
- {
- who = job->who;
-
- // Do job
- switch(job->type)
- {
- case kMatchNubJob:
- if(who)
- who->doServiceMatch();
- break;
-
- default:
- break;
- }
- }
-
- } while( alive );
-
- self->release();
-}
-
-*/
projects / apple / xnu.git / blobdiff