[PATCH v2 4/5] ntdll: Implement RtlDeactivateActivationContextUnsafeFast().

[Zhiyi Zhang]

From: Zhiyi Zhang

---
 dlls/ntdll/actctx.c   | 17 +++++++++++++++++
 dlls/ntdll/ntdll.spec |  2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/actctx.c b/dlls/ntdll/actctx.c
index 5c7aa6936ac..0f76b95d961 100644
--- a/dlls/ntdll/actctx.c
+++ b/dlls/ntdll/actctx.c
@@ -5455,6 +5455,23 @@ RTL_ACTIVATION_CONTEXT_STACK_FRAME * FASTCALL RtlActivateActivationContextUnsafe
     return &frame_extended->Frame;
 }

+/******************************************************************
+ *              RtlDeactivateActivationContextUnsafeFast (NTDLL.@)
+ *
+ * FIXME: function prototype might be wrong
+ */
+VOID FASTCALL RtlDeactivateActivationContextUnsafeFast( RTL_CALLER_ALLOCATED_ACTIVATION_CONTEXT_STACK_FRAME_EXTENDED *frame_extended )
+{
+    ACTIVATION_CONTEXT_STACK *actctx_stack = NtCurrentTeb()->ActivationContextStackPointer;
+    ACTIVATION_CONTEXT *context;
+
+    TRACE( "%p\n", frame_extended );
+
+    context = actctx_stack->ActiveFrame->ActivationContext;
+    actctx_stack->ActiveFrame = frame_extended->Frame.Previous;
+    RtlReleaseActivationContext( context );
+}
+
 /******************************************************************
  *		RtlActivateActivationContextEx (NTDLL.@)
  */
diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index f79dfd50da5..78da963b969 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -606,7 +606,7 @@
 @ stub RtlCutoverTimeToSystemTime
 @ stdcall RtlDeNormalizeProcessParams(ptr)
 @ stdcall RtlDeactivateActivationContext(long long)
-@ stub RtlDeactivateActivationContextUnsafeFast
+@ stdcall -fastcall RtlDeactivateActivationContextUnsafeFast(ptr)
 @ stub RtlDebugPrintTimes
 @ stdcall RtlDecodePointer(ptr)
 @ stdcall RtlDecodeSystemPointer(ptr) RtlDecodePointer