2018-05-04 18:58:56 +02:00
|
|
|
// Copyright 2018 The Abseil Authors.
|
|
|
|
//
|
|
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
//
|
2019-03-08 16:27:53 +01:00
|
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
2018-05-04 18:58:56 +02:00
|
|
|
//
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
// limitations under the License.
|
|
|
|
|
|
|
|
#include "absl/base/internal/atomic_hook.h"
|
|
|
|
|
2019-10-03 00:20:57 +02:00
|
|
|
#include "gmock/gmock.h"
|
2018-05-04 18:58:56 +02:00
|
|
|
#include "gtest/gtest.h"
|
|
|
|
#include "absl/base/attributes.h"
|
2019-10-03 00:20:57 +02:00
|
|
|
#include "absl/base/internal/atomic_hook_test_helper.h"
|
2018-05-04 18:58:56 +02:00
|
|
|
|
|
|
|
namespace {
|
|
|
|
|
2019-10-03 00:20:57 +02:00
|
|
|
using ::testing::Eq;
|
|
|
|
|
2018-05-04 18:58:56 +02:00
|
|
|
int value = 0;
|
|
|
|
void TestHook(int x) { value = x; }
|
|
|
|
|
|
|
|
TEST(AtomicHookTest, NoDefaultFunction) {
|
2020-02-04 23:18:00 +01:00
|
|
|
ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook<
|
|
|
|
void (*)(int)>
|
|
|
|
hook;
|
2018-05-04 18:58:56 +02:00
|
|
|
value = 0;
|
|
|
|
|
|
|
|
// Test the default DummyFunction.
|
|
|
|
EXPECT_TRUE(hook.Load() == nullptr);
|
|
|
|
EXPECT_EQ(value, 0);
|
|
|
|
hook(1);
|
|
|
|
EXPECT_EQ(value, 0);
|
|
|
|
|
|
|
|
// Test a stored hook.
|
|
|
|
hook.Store(TestHook);
|
|
|
|
EXPECT_TRUE(hook.Load() == TestHook);
|
|
|
|
EXPECT_EQ(value, 0);
|
|
|
|
hook(1);
|
|
|
|
EXPECT_EQ(value, 1);
|
|
|
|
|
|
|
|
// Calling Store() with the same hook should not crash.
|
|
|
|
hook.Store(TestHook);
|
|
|
|
EXPECT_TRUE(hook.Load() == TestHook);
|
|
|
|
EXPECT_EQ(value, 1);
|
|
|
|
hook(2);
|
|
|
|
EXPECT_EQ(value, 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
TEST(AtomicHookTest, WithDefaultFunction) {
|
|
|
|
// Set the default value to TestHook at compile-time.
|
2020-02-04 23:18:00 +01:00
|
|
|
ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES static absl::base_internal::AtomicHook<
|
|
|
|
void (*)(int)>
|
|
|
|
hook(TestHook);
|
2018-05-04 18:58:56 +02:00
|
|
|
value = 0;
|
|
|
|
|
|
|
|
// Test the default value is TestHook.
|
|
|
|
EXPECT_TRUE(hook.Load() == TestHook);
|
|
|
|
EXPECT_EQ(value, 0);
|
|
|
|
hook(1);
|
|
|
|
EXPECT_EQ(value, 1);
|
|
|
|
|
|
|
|
// Calling Store() with the same hook should not crash.
|
|
|
|
hook.Store(TestHook);
|
|
|
|
EXPECT_TRUE(hook.Load() == TestHook);
|
|
|
|
EXPECT_EQ(value, 1);
|
|
|
|
hook(2);
|
|
|
|
EXPECT_EQ(value, 2);
|
|
|
|
}
|
|
|
|
|
2019-10-03 00:20:57 +02:00
|
|
|
ABSL_CONST_INIT int override_func_calls = 0;
|
|
|
|
void OverrideFunc() { override_func_calls++; }
|
|
|
|
static struct OverrideInstaller {
|
|
|
|
OverrideInstaller() { absl::atomic_hook_internal::func.Store(OverrideFunc); }
|
|
|
|
} override_installer;
|
|
|
|
|
|
|
|
TEST(AtomicHookTest, DynamicInitFromAnotherTU) {
|
|
|
|
// MSVC 14.2 doesn't do constexpr static init correctly; in particular it
|
|
|
|
// tends to sequence static init (i.e. defaults) of `AtomicHook` objects
|
|
|
|
// after their dynamic init (i.e. overrides), overwriting whatever value was
|
|
|
|
// written during dynamic init. This regression test validates the fix.
|
|
|
|
// https://developercommunity.visualstudio.com/content/problem/336946/class-with-constexpr-constructor-not-using-static.html
|
|
|
|
EXPECT_THAT(absl::atomic_hook_internal::default_func_calls, Eq(0));
|
|
|
|
EXPECT_THAT(override_func_calls, Eq(0));
|
|
|
|
absl::atomic_hook_internal::func();
|
|
|
|
EXPECT_THAT(absl::atomic_hook_internal::default_func_calls, Eq(0));
|
|
|
|
EXPECT_THAT(override_func_calls, Eq(1));
|
|
|
|
EXPECT_THAT(absl::atomic_hook_internal::func.Load(), Eq(OverrideFunc));
|
|
|
|
}
|
|
|
|
|
2018-05-04 18:58:56 +02:00
|
|
|
} // namespace
|