ntdll: Implement RtlFreeActivationContextStack().

dlls/ntdll/actctx.c

@@ -5454,7 +5454,15 @@ void WINAPI RtlDeactivateActivationContext( ULONG flags, ULONG_PTR cookie )
  */
 void WINAPI RtlFreeThreadActivationContextStack(void)
 {
-    ACTIVATION_CONTEXT_STACK *actctx_stack = NtCurrentTeb()->ActivationContextStackPointer;
+    RtlFreeActivationContextStack( NtCurrentTeb()->ActivationContextStackPointer );
+}
+
+
+/******************************************************************
+ *		RtlFreeActivationContextStack (NTDLL.@)
+ */
+void WINAPI RtlFreeActivationContextStack( ACTIVATION_CONTEXT_STACK *actctx_stack )
+{
     RTL_ACTIVATION_CONTEXT_STACK_FRAME *frame;
 
     frame = actctx_stack->ActiveFrame;

dlls/ntdll/ntdll.spec

@@ -700,6 +700,7 @@
 @ stdcall RtlFormatCurrentUserKeyPath(ptr)
 @ stdcall RtlFormatMessage(ptr long long long long ptr ptr long ptr)
 @ stdcall RtlFormatMessageEx(ptr long long long long ptr ptr long ptr long)
+@ stdcall RtlFreeActivationContextStack(ptr)
 @ stdcall RtlFreeAnsiString(ptr)
 @ stdcall RtlFreeHandle(ptr ptr)
 @ stdcall RtlFreeHeap(long long ptr)

include/winternl.h

@@ -4524,6 +4524,7 @@ NTSYSAPI NTSTATUS  WINAPI RtlFlsSetValue(ULONG,void *);
 NTSYSAPI NTSTATUS  WINAPI RtlFormatCurrentUserKeyPath(PUNICODE_STRING);
 NTSYSAPI NTSTATUS  WINAPI RtlFormatMessage(LPCWSTR,ULONG,BOOLEAN,BOOLEAN,BOOLEAN,__ms_va_list *,LPWSTR,ULONG,ULONG*);
 NTSYSAPI NTSTATUS  WINAPI RtlFormatMessageEx(LPCWSTR,ULONG,BOOLEAN,BOOLEAN,BOOLEAN,__ms_va_list *,LPWSTR,ULONG,ULONG*,ULONG);
+NTSYSAPI void      WINAPI RtlFreeActivationContextStack(ACTIVATION_CONTEXT_STACK *);
 NTSYSAPI void      WINAPI RtlFreeAnsiString(PANSI_STRING);
 NTSYSAPI BOOLEAN   WINAPI RtlFreeHandle(RTL_HANDLE_TABLE *,RTL_HANDLE *);
 NTSYSAPI void      WINAPI RtlFreeOemString(POEM_STRING);