xnu-2422.110.17.tar.gz

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

diff --git a/iokit/Kernel/IODataQueue.cpp b/iokit/Kernel/IODataQueue.cpp
index e73acfaab746e1deb0b6587f02230d7e570284f6..84f88322ecfa8b270b1168dfe3a3e422afdee626 100644 (file)
--- a/iokit/Kernel/IODataQueue.cpp
+++ b/iokit/Kernel/IODataQueue.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/IODataQueue.h>
@@ -70,18 +73,26 @@ IODataQueue *IODataQueue::withEntries(UInt32 numEntries, UInt32 entrySize)
 
 Boolean IODataQueue::initWithCapacity(UInt32 size)
 {
+    vm_size_t allocSize = 0;
+
     if (!super::init()) {
         return false;
     }
 
-    dataQueue = (IODataQueueMemory *)IOMallocAligned(round_page(size + DATA_QUEUE_MEMORY_HEADER_SIZE), PAGE_SIZE);
+    allocSize = round_page(size + DATA_QUEUE_MEMORY_HEADER_SIZE);
+
+    if (allocSize < size) {
+        return false;
+    }
+
+    dataQueue = (IODataQueueMemory *)IOMallocAligned(allocSize, PAGE_SIZE);
     if (dataQueue == 0) {
         return false;
     }
 
-    dataQueue->queueSize = size;
-    dataQueue->head = 0;
-    dataQueue->tail = 0;
+    dataQueue->queueSize    = size;
+    dataQueue->head         = 0;
+    dataQueue->tail         = 0;
 
     return true;
 }
@@ -205,11 +216,12 @@ void IODataQueue::sendDataAvailableNotification()
     mach_msg_header_t *        msgh;
 
     msgh = (mach_msg_header_t *)notifyMsg;
-    if (msgh) {
-        kr = mach_msg_send_from_kernel(msgh, msgh->msgh_size);
+    if (msgh && msgh->msgh_remote_port) {
+        kr = mach_msg_send_from_kernel_with_options(msgh, msgh->msgh_size, MACH_SEND_TIMEOUT, MACH_MSG_TIMEOUT_NONE);
         switch(kr) {
             case MACH_SEND_TIMED_OUT:  // Notification already sent
             case MACH_MSG_SUCCESS:
+            case MACH_SEND_NO_BUFFER:
                 break;
             default:
                 IOLog("%s: dataAvailableNotification failed - msg_send returned: %d\n", /*getName()*/"IODataQueue", kr);