X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;ds=sidebyside;f=MdePkg%2FInclude%2FLibrary%2FBaseLib.h;h=d066f1be2495e261c9f7340221fad4fd7541885b;hb=3b5a58c5f0056c0dd93ffaa3b1d51d23eec0692b;hp=ecadff8b235ee3ea112c0d2d19af57586b8bbc81;hpb=0f127f31871a439250556d8ae93a325d4ff985c6;p=mirror_edk2.git

diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index ecadff8b23..d066f1be24 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -4,6 +4,7 @@
 
 Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
 Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+Copyright (c) Microsoft Corporation.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -2972,6 +2973,32 @@ PathCleanUpDirectories(
 **/
 #define INITIALIZE_LIST_HEAD_VARIABLE(ListHead)  {&(ListHead), &(ListHead)}
 
+/**
+  Iterates over each node in a doubly linked list using each node's forward link.
+
+  @param  Entry     A pointer to a list node used as a loop cursor during iteration
+  @param  ListHead  The head node of the doubly linked list
+
+**/
+#define BASE_LIST_FOR_EACH(Entry, ListHead)    \
+  for(Entry = (ListHead)->ForwardLink; Entry != (ListHead); Entry = Entry->ForwardLink)
+
+/**
+  Iterates over each node in a doubly linked list using each node's forward link
+  with safety against node removal.
+
+  This macro uses NextEntry to temporarily store the next list node so the node
+  pointed to by Entry may be deleted in the current loop iteration step and
+  iteration can continue from the node pointed to by NextEntry.
+
+  @param  Entry     A pointer to a list node used as a loop cursor during iteration
+  @param  NextEntry A pointer to a list node used to temporarily store the next node
+  @param  ListHead  The head node of the doubly linked list
+
+**/
+#define BASE_LIST_FOR_EACH_SAFE(Entry, NextEntry, ListHead)            \
+  for(Entry = (ListHead)->ForwardLink, NextEntry = Entry->ForwardLink;\
+      Entry != (ListHead); Entry = NextEntry, NextEntry = Entry->ForwardLink)
 
 /**
   Checks whether FirstEntry and SecondEntry are part of the same doubly-linked