[PATCH v7 1/1] ntoskrnl.exe: Implement ExInterlockedInsertTailList.

[Etaash Mathamsetty]

From: Etaash Mathamsetty

---
 dlls/ntoskrnl.exe/ntoskrnl.exe.spec |  2 +-
 dlls/ntoskrnl.exe/sync.c            | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 0a484829ca3..23770e54367 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -167,7 +167,7 @@
 @ stub ExInterlockedExtendZone
 @ stub ExInterlockedIncrementLong
 @ stub ExInterlockedInsertHeadList
-@ stub ExInterlockedInsertTailList
+@ stdcall ExInterlockedInsertTailList(ptr ptr ptr)
 @ stub ExInterlockedPopEntryList
 @ stub ExInterlockedPushEntryList
 @ stdcall ExInterlockedRemoveHeadList(ptr ptr)
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index d9b5726b920..3ad255b1211 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -778,6 +778,34 @@ LIST_ENTRY * WINAPI ExInterlockedRemoveHeadList( LIST_ENTRY *list, KSPIN_LOCK *l
     return ret;
 }

+/***********************************************************************
+ *           ExInterlockedInsertTailList   (NTOSKRNL.EXE.@)
+ */
+PLIST_ENTRY WINAPI ExInterlockedInsertTailList( PLIST_ENTRY head, PLIST_ENTRY entry, PKSPIN_LOCK lock )
+{
+    PLIST_ENTRY ret;
+    KIRQL irql;
+
+    TRACE( "(%p %p %p)\n", head, entry, lock );
+
+    if ( !head || !entry || !lock )
+        return NULL;
+
+    KeAcquireSpinLock( lock, &irql );
+
+    if ( IsListEmpty(head) )
+    {
+        KeReleaseSpinLock( lock, irql );
+        return NULL;
+    }
+
+    ret = head->Blink;
+    InsertTailList( head, entry );
+
+    KeReleaseSpinLock( lock, irql );
+
+    return ret;
+}

/***********************************************************************
  *           InterlockedPopEntrySList   (NTOSKRNL.EXE.@)