[CSRSRV]: Port CsrLockedReferenceThread from CSRSRV2.

svn path=/trunk/; revision=55704

reactos/subsystems/win32/csrss/csrsrv/thredsup.c

@@ -122,6 +122,28 @@ CsrAllocateThread(IN PCSR_PROCESS CsrProcess)
     return CsrThread;
 }
 
+/*++
+ * @name CsrLockedReferenceThread
+ *
+ * The CsrLockedReferenceThread refences a CSR Thread while the
+ * Process Lock is already being held.
+ *
+ * @param CsrThread
+ *        Pointer to the CSR Thread to be referenced.
+ *
+ * @return None.
+ *
+ * @remarks This routine will return with the Process Lock held.
+ *
+ *--*/
+VOID
+NTAPI
+CsrLockedReferenceThread(IN PCSR_THREAD CsrThread)
+{
+    /* Increment the reference count */
+    ++CsrThread->ReferenceCount;
+}
+
 PCSR_THREAD
 NTAPI
 CsrLocateThreadByClientId(OUT PCSR_PROCESS *Process OPTIONAL,

reactos/subsystems/win32/csrss/include/api.h

@@ -328,6 +328,10 @@ NTAPI
 CsrInsertThread(IN PCSR_PROCESS Process,
 IN PCSR_THREAD Thread);
 
+VOID
+NTAPI
+CsrLockedReferenceThread(IN PCSR_THREAD CsrThread);
+
 /* api/process.c */
 typedef NTSTATUS (WINAPI *CSRSS_ENUM_PROCESS_PROC)(PCSR_PROCESS ProcessData,
                                                     PVOID Context);