xnu-6153.141.1.tar.gz

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

diff --git a/iokit/Kernel/IOEventSource.cpp b/iokit/Kernel/IOEventSource.cpp
index d90fb2f623b340acdebfdf51b56dc5d29c8466ef..3415fd34a3e18e208d62decc3d9fdce1ec5cd372 100644 (file)
--- a/iokit/Kernel/IOEventSource.cpp
+++ b/iokit/Kernel/IOEventSource.cpp
@@ -1,39 +1,47 @@
 /*
 /*

- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2000, 2009 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_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 Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @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
+ * 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,
  * 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.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * 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@

  */
 /*
  */
 /*

-Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
-
-HISTORY
-    1998-7-13  Godfrey van der Linden(gvdl)
-        Created.
-]*/
+ *  Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
+ *
+ *  HISTORY
+ *   1998-7-13 Godfrey van der Linden(gvdl)
+ *       Created.
+ *  ]*/

 #include <IOKit/IOLib.h>
 
 #include <IOKit/IOEventSource.h>
 #include <IOKit/IOWorkLoop.h>
 #include <IOKit/IOLib.h>
 
 #include <IOKit/IOEventSource.h>
 #include <IOKit/IOWorkLoop.h>

+#include <libkern/Block.h>

 
 #define super OSObject
 
 OSDefineMetaClassAndAbstractStructors(IOEventSource, OSObject)
 
 #define super OSObject
 
 OSDefineMetaClassAndAbstractStructors(IOEventSource, OSObject)

+

 OSMetaClassDefineReservedUnused(IOEventSource, 0);
 OSMetaClassDefineReservedUnused(IOEventSource, 1);
 OSMetaClassDefineReservedUnused(IOEventSource, 2);
 OSMetaClassDefineReservedUnused(IOEventSource, 0);
 OSMetaClassDefineReservedUnused(IOEventSource, 1);
 OSMetaClassDefineReservedUnused(IOEventSource, 2);


@@ -43,67 +51,247 @@ OSMetaClassDefineReservedUnused(IOEventSource, 5);
 OSMetaClassDefineReservedUnused(IOEventSource, 6);
 OSMetaClassDefineReservedUnused(IOEventSource, 7);
 
 OSMetaClassDefineReservedUnused(IOEventSource, 6);
 OSMetaClassDefineReservedUnused(IOEventSource, 7);
 

-bool IOEventSource::init(OSObject *inOwner,
-                         Action inAction = 0)
+bool
+IOEventSource::checkForWork()
+{
+       return false;
+}
+
+/* inline function implementations */
+
+#if IOKITSTATS
+
+#define IOStatisticsRegisterCounter() \
+do { \
+       reserved->counter = IOStatistics::registerEventSource(inOwner); \
+} while (0)
+
+#define IOStatisticsUnregisterCounter() \
+do { \
+       if (reserved) \
+               IOStatistics::unregisterEventSource(reserved->counter); \
+} while (0)
+
+#define IOStatisticsOpenGate() \
+do { \
+       IOStatistics::countOpenGate(reserved->counter); \
+} while (0)
+
+#define IOStatisticsCloseGate() \
+do { \
+       IOStatistics::countCloseGate(reserved->counter); \
+} while (0)
+
+#else
+
+#define IOStatisticsRegisterCounter()
+#define IOStatisticsUnregisterCounter()
+#define IOStatisticsOpenGate()
+#define IOStatisticsCloseGate()
+
+#endif /* IOKITSTATS */
+
+void
+IOEventSource::signalWorkAvailable()
+{
+       workLoop->signalWorkAvailable();
+}
+
+void
+IOEventSource::openGate()
+{
+       IOStatisticsOpenGate();
+       workLoop->openGate();
+}
+
+void
+IOEventSource::closeGate()
+{
+       workLoop->closeGate();
+       IOStatisticsCloseGate();
+}
+
+bool
+IOEventSource::tryCloseGate()
+{
+       bool res;
+       if ((res = workLoop->tryCloseGate())) {
+               IOStatisticsCloseGate();
+       }
+       return res;
+}
+
+int
+IOEventSource::sleepGate(void *event, UInt32 type)
+{
+       int res;
+       IOStatisticsOpenGate();
+       res = workLoop->sleepGate(event, type);
+       IOStatisticsCloseGate();
+       return res;
+}
+
+int
+IOEventSource::sleepGate(void *event, AbsoluteTime deadline, UInt32 type)
+{
+       int res;
+       IOStatisticsOpenGate();
+       res = workLoop->sleepGate(event, deadline, type);
+       IOStatisticsCloseGate();
+       return res;
+}
+
+void
+IOEventSource::wakeupGate(void *event, bool oneThread)
+{
+       workLoop->wakeupGate(event, oneThread);
+}
+
+
+bool
+IOEventSource::init(OSObject *inOwner,
+    Action inAction)
+{
+       if (!inOwner) {
+               return false;
+       }
+
+       owner = inOwner;
+
+       if (!super::init()) {
+               return false;
+       }
+
+       (void) setAction(inAction);
+       enabled = true;
+
+       if (!reserved) {
+               reserved = IONew(ExpansionData, 1);
+               if (!reserved) {
+                       return false;
+               }
+       }
+
+       IOStatisticsRegisterCounter();
+
+       return true;
+}
+
+void
+IOEventSource::free( void )

 {
 {

-    if (!inOwner)
-        return false;
+       IOStatisticsUnregisterCounter();
+
+       if ((kActionBlock & flags) && actionBlock) {
+               Block_release(actionBlock);
+       }
+
+       if (reserved) {
+               IODelete(reserved, ExpansionData, 1);
+       }

 
 

-    owner = inOwner;
+       super::free();
+}
+
+void
+IOEventSource::setRefcon(void *newrefcon)
+{
+       refcon = newrefcon;
+}

 
 

-    if ( !super::init() )
-        return false;
+void *
+IOEventSource::getRefcon() const
+{
+       return refcon;
+}

 
 

-    (void) setAction(inAction);
-    enabled = true;
+IOEventSource::Action
+IOEventSource::getAction() const
+{
+       if (kActionBlock & flags) {
+               return NULL;
+       }
+       return action;
+}

 
 

-    return true;
+IOEventSource::ActionBlock
+IOEventSource::getActionBlock(ActionBlock) const
+{
+       if (kActionBlock & flags) {
+               return actionBlock;
+       }
+       return NULL;

 }
 
 }
 

-IOEventSource::Action IOEventSource::getAction () const { return action; };
+void
+IOEventSource::setAction(Action inAction)
+{
+       if ((kActionBlock & flags) && actionBlock) {
+               Block_release(actionBlock);
+       }
+       action = inAction;
+}

 
 

-void IOEventSource::setAction(Action inAction)
+void
+IOEventSource::setActionBlock(ActionBlock block)

 {
 {

-    action = inAction;
+       if ((kActionBlock & flags) && actionBlock) {
+               Block_release(actionBlock);
+       }
+       actionBlock = Block_copy(block);
+       flags |= kActionBlock;

 }
 
 }
 

-IOEventSource *IOEventSource::getNext() const { return eventChainNext; };
+IOEventSource *
+IOEventSource::getNext() const
+{
+       return eventChainNext;
+};

 
 

-void IOEventSource::setNext(IOEventSource *inNext)
+void
+IOEventSource::setNext(IOEventSource *inNext)

 {
 {

-    eventChainNext = inNext;
+       eventChainNext = inNext;

 }
 
 }
 

-void IOEventSource::enable()
+void
+IOEventSource::enable()

 {
 {

-    enabled = true;
-    if (workLoop)
-        return signalWorkAvailable();
+       enabled = true;
+       if (workLoop) {
+               return signalWorkAvailable();
+       }

 }
 
 }
 

-void IOEventSource::disable()
+void
+IOEventSource::disable()

 {
 {

-    enabled = false;
+       enabled = false;

 }
 
 }
 

-bool IOEventSource::isEnabled() const
+bool
+IOEventSource::isEnabled() const

 {
 {

-    return enabled;
+       return enabled;

 }
 
 }
 

-void IOEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
+void
+IOEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)

 {
 {

-    if ( !inWorkLoop )
-        disable();
-    workLoop = inWorkLoop;
+       if (!inWorkLoop) {
+               disable();
+       }
+       workLoop = inWorkLoop;

 }
 
 }
 

-IOWorkLoop *IOEventSource::getWorkLoop() const
+IOWorkLoop *
+IOEventSource::getWorkLoop() const

 {
 {

-    return workLoop;
+       return workLoop;

 }
 
 }
 

-bool IOEventSource::onThread() const
+bool
+IOEventSource::onThread() const

 {
 {

-    return (workLoop != 0) && workLoop->onThread();
+       return (workLoop != NULL) && workLoop->onThread();

 }
 }