Loading...
--- xnu/xnu-201.5/iokit/Kernel/IOWorkLoop.cpp
+++ xnu/xnu-792.17.14/iokit/Kernel/IOWorkLoop.cpp
@@ -1,23 +1,29 @@
/*
* Copyright (c) 1998-2000 Apple Computer, 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.
@@ -57,16 +63,6 @@
#define fFlags loopRestart
-void IOWorkLoop::launchThreadMain(void *self)
-{
- register thread_t mythread = current_thread();
-
- // Make sure that this thread always has a kernel stack
- stack_privilege(mythread);
- thread_set_cont_arg((int) self);
- threadMainContinuation();
-}
-
bool IOWorkLoop::init()
{
// The super init and gateLock allocation MUST be done first
@@ -94,7 +90,7 @@
if (addEventSource(controlG) != kIOReturnSuccess)
return false;
- workThread = IOCreateThread(launchThreadMain, (void *) this);
+ workThread = IOCreateThread((thread_continue_t)threadMainContinuation, this);
if (!workThread)
return false;
@@ -107,7 +103,7 @@
IOWorkLoop *me = new IOWorkLoop;
if (me && !me->init()) {
- me->free();
+ me->release();
return 0;
}
@@ -250,12 +246,9 @@
#endif /* KDEBUG */
-void IOWorkLoop::threadMainContinuation()
-{
- IOWorkLoop* self;
- self = (IOWorkLoop *) thread_get_cont_arg();
-
- self->threadMain();
+void IOWorkLoop::threadMainContinuation(IOWorkLoop *self)
+{
+ self->threadMain();
}
void IOWorkLoop::threadMain()
@@ -298,13 +291,7 @@
assert_wait((void *) &workToDo, false);
IOSimpleLockUnlockEnableInterrupt(workToDoLock, is);
-#if defined (__i386__)
- thread_block(0);
- continue;
-#else
- thread_set_cont_arg((int) this);
- thread_block(&threadMainContinuation);
-#endif
+ thread_block_parameter((thread_continue_t)threadMainContinuation, this);
/* NOTREACHED */
}
@@ -321,7 +308,7 @@
exitThread:
workThread = 0; // Say we don't have a loop and free ourselves
free();
- IOExitThread(0);
+ IOExitThread();
}
IOThread IOWorkLoop::getThread() const
@@ -376,8 +363,8 @@
}
IOReturn IOWorkLoop::runAction(Action inAction, OSObject *target,
- void *arg0 = 0, void *arg1 = 0,
- void *arg2 = 0, void *arg3 = 0)
+ void *arg0, void *arg1,
+ void *arg2, void *arg3)
{
IOReturn res;
@@ -398,43 +385,48 @@
switch (command)
{
case mAddEvent:
- SETP(&fFlags, kLoopRestart);
- inEvent->retain();
- inEvent->setWorkLoop(this);
- inEvent->setNext(0);
-
- if (!eventChain)
- eventChain = inEvent;
- else {
- IOEventSource *event, *next;
-
- for (event = eventChain; (next = event->getNext()); event = next)
- ;
- event->setNext(inEvent);
+ if (!inEvent->getWorkLoop()) {
+ SETP(&fFlags, kLoopRestart);
+
+ inEvent->retain();
+ inEvent->setWorkLoop(this);
+ inEvent->setNext(0);
+
+ if (!eventChain)
+ eventChain = inEvent;
+ else {
+ IOEventSource *event, *next;
+
+ for (event = eventChain; (next = event->getNext()); event = next)
+ ;
+ event->setNext(inEvent);
+ }
}
break;
case mRemoveEvent:
- if (eventChain == inEvent)
- eventChain = inEvent->getNext();
- else {
- IOEventSource *event, *next;
-
- event = eventChain;
- while ((next = event->getNext()) && next != inEvent)
- event = next;
-
- if (!next) {
- res = kIOReturnBadArgument;
- break;
+ if (inEvent->getWorkLoop()) {
+ if (eventChain == inEvent)
+ eventChain = inEvent->getNext();
+ else {
+ IOEventSource *event, *next;
+
+ event = eventChain;
+ while ((next = event->getNext()) && next != inEvent)
+ event = next;
+
+ if (!next) {
+ res = kIOReturnBadArgument;
+ break;
+ }
+ event->setNext(inEvent->getNext());
}
- event->setNext(inEvent->getNext());
+
+ inEvent->setWorkLoop(0);
+ inEvent->setNext(0);
+ inEvent->release();
+ SETP(&fFlags, kLoopRestart);
}
-
- inEvent->setWorkLoop(0);
- inEvent->setNext(0);
- inEvent->release();
- SETP(&fFlags, kLoopRestart);
break;
default: