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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/shared_impl/ppapi_globals.h"
#include "base/check.h"
#include "base/lazy_instance.h" // For testing purposes only.
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread_local.h" // For testing purposes only.
#include "base/threading/thread_task_runner_handle.h"
namespace ppapi {
namespace {
// Thread-local globals for testing. See SetPpapiGlobalsOnThreadForTest for more
// information.
base::LazyInstance<base::ThreadLocalPointer<PpapiGlobals>>::Leaky
tls_ppapi_globals_for_test = LAZY_INSTANCE_INITIALIZER;
} // namespace
PpapiGlobals* ppapi_globals = NULL;
PpapiGlobals::PpapiGlobals() {
DCHECK(!ppapi_globals);
ppapi_globals = this;
main_task_runner_ = base::ThreadTaskRunnerHandle::Get();
}
PpapiGlobals::PpapiGlobals(PerThreadForTest) {
DCHECK(!ppapi_globals);
main_task_runner_ = base::ThreadTaskRunnerHandle::Get();
}
PpapiGlobals::~PpapiGlobals() {
DCHECK(ppapi_globals == this || !ppapi_globals);
ppapi_globals = NULL;
}
// Static Getter for the global singleton.
PpapiGlobals* PpapiGlobals::Get() {
if (ppapi_globals)
return ppapi_globals;
// In unit tests, the following might be valid (see
// SetPpapiGlobalsOnThreadForTest). Normally, this will just return NULL.
return GetThreadLocalPointer();
}
// static
void PpapiGlobals::SetPpapiGlobalsOnThreadForTest(PpapiGlobals* ptr) {
// If we're using a per-thread PpapiGlobals, we should not have a global one.
// If we allowed it, it would always over-ride the "test" versions.
DCHECK(!ppapi_globals);
tls_ppapi_globals_for_test.Pointer()->Set(ptr);
}
base::SingleThreadTaskRunner* PpapiGlobals::GetMainThreadMessageLoop() {
return main_task_runner_.get();
}
void PpapiGlobals::ResetMainThreadMessageLoopForTesting() {
main_task_runner_ = base::ThreadTaskRunnerHandle::Get();
}
bool PpapiGlobals::IsHostGlobals() const { return false; }
bool PpapiGlobals::IsPluginGlobals() const { return false; }
// static
PpapiGlobals* PpapiGlobals::GetThreadLocalPointer() {
return tls_ppapi_globals_for_test.Pointer()->Get();
}
} // namespace ppapi
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