1// Copyright 2013 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package cgotlstest
6
7// extern const char *checkTLS();
8// extern void setTLS(int);
9// extern int getTLS();
10import "C"
11
12import (
13	"runtime"
14	"testing"
15)
16
17func testTLS(t *testing.T) {
18	if skip := C.checkTLS(); skip != nil {
19		t.Skipf("%s", C.GoString(skip))
20	}
21
22	runtime.LockOSThread()
23	defer runtime.UnlockOSThread()
24
25	if val := C.getTLS(); val != 0 {
26		t.Fatalf("at start, C.getTLS() = %#x, want 0", val)
27	}
28
29	const keyVal = 0x1234
30	C.setTLS(keyVal)
31	if val := C.getTLS(); val != keyVal {
32		t.Fatalf("at end, C.getTLS() = %#x, want %#x", val, keyVal)
33	}
34}
35