xnu-1699.22.81.tar.gz

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

diff --git a/iokit/Kernel/IOCommandGate.cpp b/iokit/Kernel/IOCommandGate.cpp
index 37a5304c2e30f14d3f8a3a6f990a4edf42cd106a..29ecd859e07820f9f648b3d8eec46067e680bbbe 100644 (file)
--- a/iokit/Kernel/IOCommandGate.cpp
+++ b/iokit/Kernel/IOCommandGate.cpp
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2000, 2009-2010 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@
  */
 #include <libkern/OSDebug.h>
 
@@ -25,11 +31,16 @@
 #include <IOKit/IOWorkLoop.h>
 #include <IOKit/IOReturn.h>
 #include <IOKit/IOTimeStamp.h>
+#include <IOKit/IOKitDebug.h>
 
 #define super IOEventSource
 
 OSDefineMetaClassAndStructors(IOCommandGate, IOEventSource)
+#if __LP64__
 OSMetaClassDefineReservedUnused(IOCommandGate, 0);
+#else
+OSMetaClassDefineReservedUsed(IOCommandGate, 0);
+#endif
 OSMetaClassDefineReservedUnused(IOCommandGate, 1);
 OSMetaClassDefineReservedUnused(IOCommandGate, 2);
 OSMetaClassDefineReservedUnused(IOCommandGate, 3);
@@ -38,11 +49,33 @@ OSMetaClassDefineReservedUnused(IOCommandGate, 5);
 OSMetaClassDefineReservedUnused(IOCommandGate, 6);
 OSMetaClassDefineReservedUnused(IOCommandGate, 7);
 
-bool IOCommandGate::checkForWork() { return false; }
+#if IOKITSTATS
+
+#define IOStatisticsInitializeCounter() \
+do { \
+       IOStatistics::setCounterType(IOEventSource::reserved->counter, kIOStatisticsCommandGateCounter); \
+} while (0)
+
+#define IOStatisticsActionCall() \
+do { \
+       IOStatistics::countCommandGateActionCall(IOEventSource::reserved->counter); \
+} while (0)
+
+#else
+
+#define IOStatisticsInitializeCounter()
+#define IOStatisticsActionCall()
+
+#endif /* IOKITSTATS */
 
 bool IOCommandGate::init(OSObject *inOwner, Action inAction)
 {
-    return super::init(inOwner, (IOEventSource::Action) inAction);
+    bool res = super::init(inOwner, (IOEventSource::Action) inAction);
+    if (res) {
+        IOStatisticsInitializeCounter();
+    }
+
+    return res;
 }
 
 IOCommandGate *
@@ -119,9 +152,6 @@ IOReturn IOCommandGate::runAction(Action inAction,
     if (!inAction)
         return kIOReturnBadArgument;
 
-    IOTimeStampConstant(IODBG_CMDQ(IOCMDQ_ACTION),
-                       (unsigned int) inAction, (unsigned int) owner);
-
     // closeGate is recursive needn't worry if we already hold the lock.
     closeGate();
 
@@ -148,10 +178,23 @@ IOReturn IOCommandGate::runAction(Action inAction,
        }
     }
 
+    bool trace = ( gIOKitTrace & kIOTraceCommandGates ) ? true : false;
+       
+       if (trace)
+               IOTimeStampStartConstant(IODBG_CMDQ(IOCMDQ_ACTION),
+                                                                (uintptr_t) inAction, (uintptr_t) owner);
+       
+    IOStatisticsActionCall();
+       
     // Must be gated and on the work loop or enabled
     res = (*inAction)(owner, arg0, arg1, arg2, arg3);
+       
+       if (trace)
+               IOTimeStampEndConstant(IODBG_CMDQ(IOCMDQ_ACTION),
+                                                          (uintptr_t) inAction, (uintptr_t) owner);
+    
     openGate();
-
+       
     return res;
 }
 
@@ -172,10 +215,20 @@ IOReturn IOCommandGate::attemptAction(Action inAction,
     if (!workLoop->onThread() && !enabled)
         res = kIOReturnNotPermitted;
     else {
-       IOTimeStampConstant(IODBG_CMDQ(IOCMDQ_ACTION),
-                           (unsigned int) inAction, (unsigned int) owner);
-
-       res = (*inAction)(owner, arg0, arg1, arg2, arg3);
+               
+        bool trace = ( gIOKitTrace & kIOTraceCommandGates ) ? true : false;
+               
+        if (trace)
+            IOTimeStampStartConstant(IODBG_CMDQ(IOCMDQ_ACTION),
+                                                                        (uintptr_t) inAction, (uintptr_t) owner);
+        
+        IOStatisticsActionCall();
+        
+        res = (*inAction)(owner, arg0, arg1, arg2, arg3);
+               
+        if (trace)
+            IOTimeStampEndConstant(IODBG_CMDQ(IOCMDQ_ACTION),
+                                                                  (uintptr_t) inAction, (uintptr_t) owner);
     }
 
     openGate();
@@ -191,6 +244,14 @@ IOReturn IOCommandGate::commandSleep(void *event, UInt32 interruptible)
     return sleepGate(event, interruptible);
 }
 
+IOReturn IOCommandGate::commandSleep(void *event, AbsoluteTime deadline, UInt32 interruptible)
+{
+    if (!workLoop->inGate())
+        return kIOReturnNotPermitted;
+
+    return sleepGate(event, deadline, interruptible);
+}
+
 void IOCommandGate::commandWakeup(void *event, bool oneThread)
 {
     wakeupGate(event, oneThread);