Add a class for supporting platform independent thread-local storage.
Windows people, please double-check/patch this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74209 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Win32/ThreadLocal.inc b/lib/System/Win32/ThreadLocal.inc
new file mode 100644
index 0000000..5bba8b5
--- /dev/null
+++ b/lib/System/Win32/ThreadLocal.inc
@@ -0,0 +1,49 @@
+//= llvm/System/Win32/ThreadLocal.inc - Win32 Thread Local Data -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Win32 specific (non-pthread) ThreadLocal class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic Win32 code that
+//=== is guaranteed to work on *all* Win32 variants.
+//===----------------------------------------------------------------------===//
+
+#include "Win32.h"
+#include "llvm/System/ThreadLocal.h"
+
+namespace llvm {
+using namespace sys;
+
+ThreadLocalImpl::ThreadLocalImpl() {
+ DWORD* tls = new DWORD;
+ *tls = TlsAlloc();
+ assert(*tls != TLS_OUT_OF_INDEXES);
+ data = tls;
+}
+
+ThreadLocalImpl::~ThreadLocalImpl() {
+ DWORD* tls = static_cast<DWORD*>(data);
+ TlsFree(*tls);
+ delete tls;
+}
+
+void* ThreadLocalImpl::getInstance() {
+ DWORD* tls = static_cast<DWORD*>(data);
+ return TlsGetValue(*tls);
+}
+
+void ThreadLocalImpl::setInstance(void* d){
+ DWORD* tls = static_cast<DWORD*>(data);
+ int errorcode = TlsSetValue(*tls, d);
+ assert(errorcode == 0);
+}
+
+}