1 files changed, 34 insertions, 0 deletions
diff --git a/src/cmd/cgo/internal/testtls/tls.go b/src/cmd/cgo/internal/testtls/tls.go
new file mode 100644
index 0000000..78628f5
--- /dev/null
+++ b/src/cmd/cgo/internal/testtls/tls.go
@@ -0,0 +1,34 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cgotlstest
+
+// extern const char *checkTLS();
+// extern void setTLS(int);
+// extern int getTLS();
+import "C"
+
+import (
+	"runtime"
+	"testing"
+)
+
+func testTLS(t *testing.T) {
+	if skip := C.checkTLS(); skip != nil {
+		t.Skipf("%s", C.GoString(skip))
+	}
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	if val := C.getTLS(); val != 0 {
+		t.Fatalf("at start, C.getTLS() = %#x, want 0", val)
+	}
+
+	const keyVal = 0x1234
+	C.setTLS(keyVal)
+	if val := C.getTLS(); val != keyVal {
+		t.Fatalf("at end, C.getTLS() = %#x, want %#x", val, keyVal)
+	}
+}