Add support for const thread locals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74226 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Win32/ThreadLocal.inc b/lib/System/Win32/ThreadLocal.inc
index 5bba8b5..0ba3be4 100644
--- a/lib/System/Win32/ThreadLocal.inc
+++ b/lib/System/Win32/ThreadLocal.inc
@@ -35,12 +35,12 @@
   delete tls;
 }
 
-void* ThreadLocalImpl::getInstance() {
+const void* ThreadLocalImpl::getInstance() {
   DWORD* tls = static_cast<DWORD*>(data);
   return TlsGetValue(*tls);
 }
 
-void ThreadLocalImpl::setInstance(void* d){
+void ThreadLocalImpl::setInstance(const void* d){
   DWORD* tls = static_cast<DWORD*>(data);
   int errorcode = TlsSetValue(*tls, d);
   assert(errorcode == 0);