ppapi_globals.cc revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ppapi/shared_impl/ppapi_globals.h"
6
7#include "base/lazy_instance.h"  // For testing purposes only.
8#include "base/logging.h"
9#include "base/message_loop_proxy.h"
10#include "base/threading/thread_local.h"  // For testing purposes only.
11
12namespace ppapi {
13
14namespace {
15// Thread-local globals for testing. See SetPpapiGlobalsOnThreadForTest for more
16// information.
17base::LazyInstance<base::ThreadLocalPointer<PpapiGlobals> >::Leaky
18    tls_ppapi_globals_for_test = LAZY_INSTANCE_INITIALIZER;
19}  // namespace
20
21PpapiGlobals* PpapiGlobals::ppapi_globals_ = NULL;
22
23PpapiGlobals::PpapiGlobals() {
24  DCHECK(!ppapi_globals_);
25  ppapi_globals_ = this;
26  main_loop_proxy_ = base::MessageLoopProxy::current();
27}
28
29PpapiGlobals::PpapiGlobals(PerThreadForTest) {
30  DCHECK(!ppapi_globals_);
31  main_loop_proxy_ = base::MessageLoopProxy::current();
32}
33
34PpapiGlobals::~PpapiGlobals() {
35  DCHECK(ppapi_globals_ == this || !ppapi_globals_);
36  ppapi_globals_ = NULL;
37}
38
39// static
40void PpapiGlobals::SetPpapiGlobalsOnThreadForTest(PpapiGlobals* ptr) {
41  // If we're using a per-thread PpapiGlobals, we should not have a global one.
42  // If we allowed it, it would always over-ride the "test" versions.
43  DCHECK(!ppapi_globals_);
44  tls_ppapi_globals_for_test.Pointer()->Set(ptr);
45}
46
47base::MessageLoopProxy* PpapiGlobals::GetMainThreadMessageLoop() {
48  return main_loop_proxy_.get();
49}
50
51bool PpapiGlobals::IsHostGlobals() const {
52  return false;
53}
54
55bool PpapiGlobals::IsPluginGlobals() const {
56  return false;
57}
58
59// static
60PpapiGlobals* PpapiGlobals::GetThreadLocalPointer() {
61  return tls_ppapi_globals_for_test.Pointer()->Get();
62}
63
64}  // namespace ppapi
65