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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 "base/threading/non_thread_safe.h"
#include <memory>
#include "base/logging.h"
#include "base/macros.h"
#include "base/test/gtest_util.h"
#include "base/threading/simple_thread.h"
#include "testing/gtest/include/gtest/gtest.h"
// Duplicated from base/threading/non_thread_safe.h so that we can be
// good citizens there and undef the macro.
#if (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON))
#define ENABLE_NON_THREAD_SAFE 1
#else
#define ENABLE_NON_THREAD_SAFE 0
#endif
namespace base {
namespace {
// Simple class to exersice the basics of NonThreadSafe.
// Both the destructor and DoStuff should verify that they were
// called on the same thread as the constructor.
class NonThreadSafeClass : public NonThreadSafe {
public:
NonThreadSafeClass() {}
// Verifies that it was called on the same thread as the constructor.
void DoStuff() {
DCHECK(CalledOnValidThread());
}
void DetachFromThread() {
NonThreadSafe::DetachFromThread();
}
static void MethodOnDifferentThreadImpl();
static void DestructorOnDifferentThreadImpl();
private:
DISALLOW_COPY_AND_ASSIGN(NonThreadSafeClass);
};
// Calls NonThreadSafeClass::DoStuff on another thread.
class CallDoStuffOnThread : public SimpleThread {
public:
explicit CallDoStuffOnThread(NonThreadSafeClass* non_thread_safe_class)
: SimpleThread("call_do_stuff_on_thread"),
non_thread_safe_class_(non_thread_safe_class) {
}
void Run() override { non_thread_safe_class_->DoStuff(); }
private:
NonThreadSafeClass* non_thread_safe_class_;
DISALLOW_COPY_AND_ASSIGN(CallDoStuffOnThread);
};
// Deletes NonThreadSafeClass on a different thread.
class DeleteNonThreadSafeClassOnThread : public SimpleThread {
public:
explicit DeleteNonThreadSafeClassOnThread(
NonThreadSafeClass* non_thread_safe_class)
: SimpleThread("delete_non_thread_safe_class_on_thread"),
non_thread_safe_class_(non_thread_safe_class) {
}
void Run() override { non_thread_safe_class_.reset(); }
private:
std::unique_ptr<NonThreadSafeClass> non_thread_safe_class_;
DISALLOW_COPY_AND_ASSIGN(DeleteNonThreadSafeClassOnThread);
};
} // namespace
TEST(NonThreadSafeTest, CallsAllowedOnSameThread) {
std::unique_ptr<NonThreadSafeClass> non_thread_safe_class(
new NonThreadSafeClass);
// Verify that DoStuff doesn't assert.
non_thread_safe_class->DoStuff();
// Verify that the destructor doesn't assert.
non_thread_safe_class.reset();
}
TEST(NonThreadSafeTest, DetachThenDestructOnDifferentThread) {
std::unique_ptr<NonThreadSafeClass> non_thread_safe_class(
new NonThreadSafeClass);
// Verify that the destructor doesn't assert when called on a different thread
// after a detach.
non_thread_safe_class->DetachFromThread();
DeleteNonThreadSafeClassOnThread delete_on_thread(
non_thread_safe_class.release());
delete_on_thread.Start();
delete_on_thread.Join();
}
void NonThreadSafeClass::MethodOnDifferentThreadImpl() {
std::unique_ptr<NonThreadSafeClass> non_thread_safe_class(
new NonThreadSafeClass);
// Verify that DoStuff asserts in debug builds only when called
// on a different thread.
CallDoStuffOnThread call_on_thread(non_thread_safe_class.get());
call_on_thread.Start();
call_on_thread.Join();
}
#if DCHECK_IS_ON()
TEST(NonThreadSafeDeathTest, MethodNotAllowedOnDifferentThreadInDebug) {
ASSERT_DCHECK_DEATH({ NonThreadSafeClass::MethodOnDifferentThreadImpl(); });
}
#else
TEST(NonThreadSafeTest, MethodAllowedOnDifferentThreadInRelease) {
NonThreadSafeClass::MethodOnDifferentThreadImpl();
}
#endif // DCHECK_IS_ON()
void NonThreadSafeClass::DestructorOnDifferentThreadImpl() {
std::unique_ptr<NonThreadSafeClass> non_thread_safe_class(
new NonThreadSafeClass);
// Verify that the destructor asserts in debug builds only
// when called on a different thread.
DeleteNonThreadSafeClassOnThread delete_on_thread(
non_thread_safe_class.release());
delete_on_thread.Start();
delete_on_thread.Join();
}
#if DCHECK_IS_ON()
TEST(NonThreadSafeDeathTest, DestructorNotAllowedOnDifferentThreadInDebug) {
ASSERT_DCHECK_DEATH(
{ NonThreadSafeClass::DestructorOnDifferentThreadImpl(); });
}
#else
TEST(NonThreadSafeTest, DestructorAllowedOnDifferentThreadInRelease) {
NonThreadSafeClass::DestructorOnDifferentThreadImpl();
}
#endif // DCHECK_IS_ON()
} // namespace base
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