| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // 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 <ostream> |
| #include <string> |
| #include <type_traits> |
| #include <utility> |
| |
| #include <glog/logging.h> |
| #include <gtest/gtest.h> |
| |
| #include "kudu/gutil/bind.h" |
| #include "kudu/gutil/bind_helpers.h" |
| #include "kudu/gutil/callback.h" |
| #include "kudu/gutil/gscoped_ptr.h" |
| #include "kudu/gutil/macros.h" |
| #include "kudu/gutil/ref_counted.h" |
| |
| namespace kudu { |
| |
| using std::string; |
| |
| static int Return5() { |
| return 5; |
| } |
| |
| TEST(CallbackBindTest, TestFreeFunction) { |
| Callback<int(void)> func_cb = Bind(&Return5); |
| ASSERT_EQ(5, func_cb.Run()); |
| } |
| |
| class Ref : public RefCountedThreadSafe<Ref> { |
| public: |
| int Foo() { return 3; } |
| }; |
| |
| // Simple class that helps with verifying ref counting. |
| // Not thread-safe. |
| struct RefCountable { |
| RefCountable() |
| : refs(0) { |
| } |
| void AddRef() const { |
| refs++; |
| } |
| void Release() const { |
| refs--; |
| } |
| void Print() const { |
| LOG(INFO) << "Hello. Refs: " << refs; |
| } |
| |
| mutable int refs; |
| DISALLOW_COPY_AND_ASSIGN(RefCountable); |
| }; |
| |
| TEST(CallbackBindTest, TestClassMethod) { |
| scoped_refptr<Ref> ref = new Ref(); |
| Callback<int(void)> ref_cb = Bind(&Ref::Foo, ref); |
| ref = nullptr; |
| ASSERT_EQ(3, ref_cb.Run()); |
| } |
| |
| int ReturnI(int i, const char* str) { |
| return i; |
| } |
| |
| TEST(CallbackBindTest, TestPartialBind) { |
| Callback<int(const char*)> cb = Bind(&ReturnI, 23); |
| ASSERT_EQ(23, cb.Run("hello world")); |
| } |
| |
| char IncrementChar(gscoped_ptr<char> in) { |
| return *in + 1; |
| } |
| |
| TEST(CallbackBindTest, TestCallScopedPtrArg) { |
| // Calling a function with a gscoped_ptr argument is just like any other |
| // function which takes gscoped_ptr: |
| gscoped_ptr<char> foo(new char('x')); |
| Callback<char(gscoped_ptr<char>)> cb = Bind(&IncrementChar); |
| ASSERT_EQ('y', cb.Run(std::move(foo))); |
| } |
| |
| TEST(CallbackBindTest, TestBindScopedPtrArg) { |
| // Binding a function with a gscoped_ptr argument requires using Passed() |
| gscoped_ptr<char> foo(new char('x')); |
| Callback<char(void)> cb = Bind(&IncrementChar, Passed(&foo)); |
| ASSERT_EQ('y', cb.Run()); |
| } |
| |
| // Test that the ref counting functionality works. |
| TEST(CallbackBindTest, TestRefCounting) { |
| RefCountable countable; |
| { |
| ASSERT_EQ(0, countable.refs); |
| Closure cb = Bind(&RefCountable::Print, &countable); |
| ASSERT_EQ(1, countable.refs); |
| cb.Run(); |
| ASSERT_EQ(1, countable.refs); |
| } |
| ASSERT_EQ(0, countable.refs); |
| } |
| |
| } // namespace kudu |