1/*
2 * Copyright 2017-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <folly/executors/GlobalExecutor.h>
18#include <folly/executors/IOExecutor.h>
19#include <folly/portability/GTest.h>
20
21using namespace folly;
22
23TEST(GlobalExecutorTest, GlobalCPUExecutor) {
24 class DummyExecutor : public folly::Executor {
25 public:
26 void add(Func f) override {
27 f();
28 count++;
29 }
30 int count{0};
31 };
32
33 // The default CPU executor is a synchronous inline executor, lets verify
34 // that work we add is executed
35 auto count = 0;
36 auto f = [&]() { count++; };
37
38 // Don't explode, we should create the default global CPUExecutor lazily here.
39 getCPUExecutor()->add(f);
40 EXPECT_EQ(1, count);
41
42 {
43 auto dummy = std::make_shared<DummyExecutor>();
44 setCPUExecutor(dummy);
45 getCPUExecutor()->add(f);
46 // Make sure we were properly installed.
47 EXPECT_EQ(1, dummy->count);
48 EXPECT_EQ(2, count);
49 }
50
51 // Don't explode, we should restore the default global CPUExecutor because our
52 // weak reference to dummy has expired
53 getCPUExecutor()->add(f);
54 EXPECT_EQ(3, count);
55}
56
57TEST(GlobalExecutorTest, GlobalIOExecutor) {
58 class DummyExecutor : public IOExecutor {
59 public:
60 void add(Func) override {
61 count++;
62 }
63 folly::EventBase* getEventBase() override {
64 return nullptr;
65 }
66 int count{0};
67 };
68
69 auto f = []() {};
70
71 // Don't explode, we should create the default global IOExecutor lazily here.
72 getIOExecutor()->add(f);
73
74 {
75 auto dummy = std::make_shared<DummyExecutor>();
76 setIOExecutor(dummy);
77 getIOExecutor()->add(f);
78 // Make sure we were properly installed.
79 EXPECT_EQ(1, dummy->count);
80 }
81
82 // Don't explode, we should restore the default global IOExecutor because our
83 // weak reference to dummy has expired
84 getIOExecutor()->add(f);
85}
86