Updated the copyright year.

[mirror_edk2.git] / EdkModulePkg / Universal / PCD / Dxe / Pcd.c

diff --git a/EdkModulePkg/Universal/PCD/Dxe/Pcd.c b/EdkModulePkg/Universal/PCD/Dxe/Pcd.c
index c8db1b02b743d6a79f83c302151a7e113d439ea0..641cb706eeb66279bf018226ff9b37d5eaa572c4 100644 (file)
--- a/EdkModulePkg/Universal/PCD/Dxe/Pcd.c
+++ b/EdkModulePkg/Universal/PCD/Dxe/Pcd.c
@@ -1,7 +1,7 @@
 /** @file\r
 PCD DXE driver\r
 \r
-Copyright (c) 2006, Intel Corporation\r
+Copyright (c) 2006 - 2007, Intel Corporation\r
 All rights reserved. This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -17,6 +17,7 @@ Module Name: Pcd.c
 \r
 #include "Service.h"\r
 \r
+EFI_LOCK mPcdDatabaseLock = EFI_INITIALIZE_LOCK_VARIABLE(EFI_TPL_CALLBACK);\r
 \r
 PCD_PROTOCOL mPcdInstance = {\r
   DxePcdSetSku,\r
@@ -472,9 +473,20 @@ DxeRegisterCallBackOnSet (
   IN  PCD_PROTOCOL_CALLBACK   CallBackFunction\r
   )\r
 {\r
+  EFI_STATUS Status;\r
+  \r
   ASSERT (CallBackFunction != NULL);\r
   \r
-  return DxeRegisterCallBackWorker (TokenNumber, Guid, CallBackFunction);\r
+  //\r
+  // Aquire lock to prevent reentrance from TPL_CALLBACK level\r
+  //\r
+  EfiAcquireLock (&mPcdDatabaseLock);\r
+\r
+  Status = DxeRegisterCallBackWorker (TokenNumber, Guid, CallBackFunction);\r
+\r
+  EfiReleaseLock (&mPcdDatabaseLock);\r
+  \r
+  return Status;\r
 }\r
 \r
 \r
@@ -487,9 +499,20 @@ DxeUnRegisterCallBackOnSet (
   IN  PCD_PROTOCOL_CALLBACK   CallBackFunction\r
   )\r
 {\r
+  EFI_STATUS Status;\r
+  \r
   ASSERT (CallBackFunction != NULL);\r
+\r
+  //\r
+  // Aquire lock to prevent reentrance from TPL_CALLBACK level\r
+  //\r
+  EfiAcquireLock (&mPcdDatabaseLock);\r
   \r
-  return DxeUnRegisterCallBackWorker (TokenNumber, Guid, CallBackFunction);\r
+  Status = DxeUnRegisterCallBackWorker (TokenNumber, Guid, CallBackFunction);\r
+\r
+  EfiReleaseLock (&mPcdDatabaseLock);\r
+  \r
+  return Status;\r
 }\r
 \r
 \r