/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
#include <IOKit/IOInterruptEventSource.h>
#include <IOKit/IOCommandGate.h>
#include <IOKit/IOTimeStamp.h>
+#include <libkern/OSDebug.h>
#define super OSObject
OSMetaClassDefineReservedUnused(IOWorkLoop, 7);
enum IOWorkLoopState { kLoopRestart = 0x1, kLoopTerminate = 0x2 };
+#ifdef __ppc__
static inline void SETP(void *addr, unsigned int flag)
{ unsigned int *num = (unsigned int *) addr; *num |= flag; }
static inline void CLRP(void *addr, unsigned int flag)
{ unsigned int *num = (unsigned int *) addr; *num &= ~flag; }
static inline bool ISSETP(void *addr, unsigned int flag)
{ unsigned int *num = (unsigned int *) addr; return (*num & flag) != 0; }
+#else
+static inline void SETP(void *addr, unsigned int flag)
+ { unsigned char *num = (unsigned char *) addr; *num |= flag; }
+static inline void CLRP(void *addr, unsigned int flag)
+ { unsigned char *num = (unsigned char *) addr; *num &= ~flag; }
+static inline bool ISSETP(void *addr, unsigned int flag)
+ { unsigned char *num = (unsigned char *) addr; return (*num & flag) != 0; }
+#endif
#define fFlags loopRestart
// The super init and gateLock allocation MUST be done first
if ( !super::init() )
return false;
+
+ if ( gateLock == NULL ) {
+ if ( !( gateLock = IORecursiveLockAlloc()) )
+ return false;
+ }
+
+ if ( workToDoLock == NULL ) {
+ if ( !(workToDoLock = IOSimpleLockAlloc()) )
+ return false;
+ IOSimpleLockInit(workToDoLock);
+ workToDo = false;
+ }
- if ( !(gateLock = IORecursiveLockAlloc()) )
- return false;
-
- if ( !(workToDoLock = IOSimpleLockAlloc()) )
- return false;
-
- controlG = IOCommandGate::
- commandGate(this, OSMemberFunctionCast(IOCommandGate::Action,
- this, &IOWorkLoop::_maintRequest));
- if ( !controlG )
- return false;
-
- IOSimpleLockInit(workToDoLock);
- workToDo = false;
-
- // Point the controlGate at the workLoop. Usually addEventSource
- // does this automatically. The problem is in this case addEventSource
- // uses the control gate and it has to be bootstrapped.
- controlG->setWorkLoop(this);
- if (addEventSource(controlG) != kIOReturnSuccess)
- return false;
+ if ( controlG == NULL ) {
+ controlG = IOCommandGate::commandGate(
+ this,
+ OSMemberFunctionCast(
+ IOCommandGate::Action,
+ this,
+ &IOWorkLoop::_maintRequest));
+
+ if ( !controlG )
+ return false;
+ // Point the controlGate at the workLoop. Usually addEventSource
+ // does this automatically. The problem is in this case addEventSource
+ // uses the control gate and it has to be bootstrapped.
+ controlG->setWorkLoop(this);
+ if (addEventSource(controlG) != kIOReturnSuccess)
+ return false;
+ }
- IOThreadFunc cptr =
- OSMemberFunctionCast(IOThreadFunc, this, &IOWorkLoop::threadMain);
- workThread = IOCreateThread(cptr, this);
- if (!workThread)
- return false;
+ if ( workThread == NULL ) {
+ IOThreadFunc cptr = OSMemberFunctionCast(
+ IOThreadFunc,
+ this,
+ &IOWorkLoop::threadMain);
+ workThread = IOCreateThread(cptr, this);
+ if (!workThread)
+ return false;
+ }
return true;
}
IOWorkLoop *
IOWorkLoop::workLoop()
+{
+ return IOWorkLoop::workLoopWithOptions(0);
+}
+
+IOWorkLoop *
+IOWorkLoop::workLoopWithOptions(IOOptionBits options)
{
IOWorkLoop *me = new IOWorkLoop;
+ if (me && options) {
+ me->reserved = IONew(ExpansionData, 1);
+ if (!me->reserved) {
+ me->release();
+ return 0;
+ }
+ me->reserved->options = options;
+ }
+
if (me && !me->init()) {
me->release();
return 0;
IOInterruptState is;
// If we are here then we must be trying to shut down this work loop
- // in this case disable all of the event source, mark the loop for
+ // in this case disable all of the event source, mark the loop
// as terminating and wakeup the work thread itself and return
// Note: we hold the gate across the entire operation mainly for the
// benefit of our event sources so we can disable them cleanly.
}
eventChain = 0;
- // Either we have a partial initialisation to clean up
- // or we the workThread itself is performing hari-kari.
- // either way clean up all of our resources and return.
+ // Either we have a partial initialization to clean up
+ // or the workThread itself is performing hari-kari.
+ // Either way clean up all of our resources and return.
if (controlG) {
controlG->release();
IORecursiveLockFree(gateLock);
gateLock = 0;
}
+ if (reserved) {
+ IODelete(reserved, ExpansionData, 1);
+ reserved = 0;
+ }
super::free();
}
bool more;
do {
CLRP(&fFlags, kLoopRestart);
- workToDo = more = false;
+ more = false;
+ IOInterruptState is = IOSimpleLockLockDisableInterrupt(workToDoLock);
+ workToDo = false;
+ IOSimpleLockUnlockEnableInterrupt(workToDoLock, is);
for (IOEventSource *evnt = eventChain; evnt; evnt = evnt->getNext()) {
IOTimeClientS();
/* virtual */ void IOWorkLoop::threadMain()
{
+restartThread:
do {
if ( !runEventSources() )
goto exitThread;
if ( !ISSETP(&fFlags, kLoopTerminate) && !workToDo) {
assert_wait((void *) &workToDo, false);
IOSimpleLockUnlockEnableInterrupt(workToDoLock, is);
-
- thread_continue_t cptr = OSMemberFunctionCast(
- thread_continue_t, this, &IOWorkLoop::threadMain);
+ thread_continue_t cptr = NULL;
+ if (!reserved || !(kPreciousStack & reserved->options))
+ cptr = OSMemberFunctionCast(
+ thread_continue_t, this, &IOWorkLoop::threadMain);
thread_block_parameter(cptr, this);
+ goto restartThread;
/* NOTREACHED */
}
projects / apple / xnu.git / blobdiff