xnu-1504.3.12.tar.gz

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

diff --git a/iokit/Kernel/IOPMPowerSourceList.cpp b/iokit/Kernel/IOPMPowerSourceList.cpp
index 1a968d5888dfac3112bb159fbd9bb1e5e3b47e84..a933ebf767eea42c866e5c98967e8f28088dd663 100644 (file)
--- a/iokit/Kernel/IOPMPowerSourceList.cpp
+++ b/iokit/Kernel/IOPMPowerSourceList.cpp
@@ -1,16 +1,19 @@
 /*
  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
@@ -20,7 +23,7 @@
  * 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 <IOKit/pwr_mgt/IOPM.h>
 #include <IOKit/pwr_mgt/IOPMPowerSourceList.h>
@@ -29,54 +32,61 @@
 #define super OSObject
 OSDefineMetaClassAndStructors(IOPMPowerSourceList,OSObject)
 
-//*********************************************************************************
+//******************************************************************************
 // init
 //
-//*********************************************************************************
+//******************************************************************************
 void IOPMPowerSourceList::initialize ( void )
 {
     firstItem = NULL;
     length = 0;
 }
 
-//*********************************************************************************
+//******************************************************************************
 // addToList
 //
-//*********************************************************************************
+//******************************************************************************
 
-IOReturn IOPMPowerSourceList::addToList ( IOPMPowerSource * newPowerSource )
+IOReturn IOPMPowerSourceList::addToList(IOPMPowerSource *newPowerSource)
 {
     IOPMPowerSource * nextPowerSource;
-    nextPowerSource = firstItem;                               // Is new object already in the list?
-    while (  nextPowerSource != NULL ) {
-        if ( nextPowerSource == newPowerSource ) {
-            return IOPMNoErr;                          // yes, just return
+
+    // Is new object already in the list?
+    nextPowerSource = firstItem;
+    while (  nextPowerSource != NULL ) 
+    {
+        if ( nextPowerSource == newPowerSource ) 
+        {
+            // yes, just return
+            return IOPMNoErr;                          
         }
         nextPowerSource = nextInList(nextPowerSource);
     }
-    newPowerSource->nextInList = firstItem;            // add it to list
+
+    // add it to list
+    newPowerSource->nextInList = firstItem;
     firstItem = newPowerSource;
-    length += 1;
+    length++;
     return IOPMNoErr;
 }
 
 
-//*********************************************************************************
+//******************************************************************************
 // firstInList
 //
-//*********************************************************************************
+//******************************************************************************
 
 IOPMPowerSource * IOPMPowerSourceList::firstInList ( void )
 {
     return firstItem;
 }
 
-//*********************************************************************************
+//******************************************************************************
 // nextInList
 //
-//*********************************************************************************
+//******************************************************************************
 
-IOPMPowerSource * IOPMPowerSourceList::nextInList ( IOPMPowerSource * currentItem )
+IOPMPowerSource * IOPMPowerSourceList::nextInList(IOPMPowerSource *currentItem)
 {
     if ( currentItem != NULL ) {
        return (currentItem->nextInList);
@@ -84,54 +94,56 @@ IOPMPowerSource * IOPMPowerSourceList::nextInList ( IOPMPowerSource * currentIte
     return NULL;
 }
 
-//*********************************************************************************
+//******************************************************************************
 // numberOfItems
 //
-//*********************************************************************************
+//******************************************************************************
 
 unsigned long IOPMPowerSourceList::numberOfItems ( void )
 {
     return length;
 }
 
-//*********************************************************************************
+//******************************************************************************
 // removeFromList
 //
 // Find the item in the list, unlink it, and free it.
-//*********************************************************************************
+//******************************************************************************
 
 IOReturn IOPMPowerSourceList::removeFromList ( IOPMPowerSource * theItem )
 {
     IOPMPowerSource * item = firstItem;
     IOPMPowerSource * temp;
 
-    if ( item != NULL ) {
-        if ( item  == theItem ) {
-            firstItem = item->nextInList;
+    if ( NULL == item) goto exit;
+    
+    if ( item  == theItem ) {
+        firstItem = item->nextInList;
+        length--;
+        item->release();
+        return IOPMNoErr;
+    }
+    while ( item->nextInList != NULL ) {
+        if ( item->nextInList == theItem ) {
+            temp = item->nextInList;
+            item->nextInList = temp->nextInList;
             length--;
-            item->release();
+            temp->release();
             return IOPMNoErr;
         }
-        while ( item->nextInList != NULL ) {
-            if ( item->nextInList == theItem ) {
-                temp = item->nextInList;
-                item->nextInList = temp->nextInList;
-                length--;
-                temp->release();
-                return IOPMNoErr;
-            }
-            item = item->nextInList;
-        }
+        item = item->nextInList;
     }
+
+exit:
     return IOPMNoErr;
 }
 
 
-//*********************************************************************************
+//******************************************************************************
 // free
 //
 // Free all items in the list, and then free the list itself
-//*********************************************************************************
+//******************************************************************************
 
 void IOPMPowerSourceList::free (void )
 {
@@ -143,7 +155,7 @@ void IOPMPowerSourceList::free (void )
         next->release();
         next = firstItem;        
     }
-super::free();
+    super::free();
 }