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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/atomic_sequence_num.h" | |
| 6 #include "base/strings/string_number_conversions.h" | |
| 7 #include "base/synchronization/waitable_event.h" | |
| 8 #include "base/threading/simple_thread.h" | |
| 9 #include "testing/gtest/include/gtest/gtest.h" | |
| 10 | |
| 11 namespace base { | |
| 12 | |
| 13 namespace { | |
| 14 | |
| 15 class SetIntRunner : public DelegateSimpleThread::Delegate { | |
| 16 public: | |
| 17 SetIntRunner(int* ptr, int val) : ptr_(ptr), val_(val) { } | |
| 18 ~SetIntRunner() override {} | |
| 19 | |
| 20 void Run() override { *ptr_ = val_; } | |
| 21 | |
| 22 private: | |
| 23 int* ptr_; | |
| 24 int val_; | |
| 25 }; | |
| 26 | |
| 27 class WaitEventRunner : public DelegateSimpleThread::Delegate { | |
| 28 public: | |
| 29 explicit WaitEventRunner(WaitableEvent* event) : event_(event) { } | |
| 30 ~WaitEventRunner() override {} | |
| 31 | |
| 32 void Run() override { | |
| 33 EXPECT_FALSE(event_->IsSignaled()); | |
| 34 event_->Signal(); | |
| 35 EXPECT_TRUE(event_->IsSignaled()); | |
| 36 } | |
| 37 private: | |
| 38 WaitableEvent* event_; | |
| 39 }; | |
| 40 | |
| 41 class SeqRunner : public DelegateSimpleThread::Delegate { | |
| 42 public: | |
| 43 explicit SeqRunner(AtomicSequenceNumber* seq) : seq_(seq) { } | |
| 44 void Run() override { seq_->GetNext(); } | |
| 45 | |
| 46 private: | |
| 47 AtomicSequenceNumber* seq_; | |
| 48 }; | |
| 49 | |
| 50 // We count up on a sequence number, firing on the event when we've hit our | |
| 51 // expected amount, otherwise we wait on the event. This will ensure that we | |
| 52 // have all threads outstanding until we hit our expected thread pool size. | |
| 53 class VerifyPoolRunner : public DelegateSimpleThread::Delegate { | |
| 54 public: | |
| 55 VerifyPoolRunner(AtomicSequenceNumber* seq, | |
| 56 int total, WaitableEvent* event) | |
| 57 : seq_(seq), total_(total), event_(event) { } | |
| 58 | |
| 59 void Run() override { | |
| 60 if (seq_->GetNext() == total_) { | |
| 61 event_->Signal(); | |
| 62 } else { | |
| 63 event_->Wait(); | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 private: | |
| 68 AtomicSequenceNumber* seq_; | |
| 69 int total_; | |
| 70 WaitableEvent* event_; | |
| 71 }; | |
| 72 | |
| 73 } // namespace | |
| 74 | |
| 75 TEST(SimpleThreadTest, CreateAndJoin) { | |
| 76 int stack_int = 0; | |
| 77 | |
| 78 SetIntRunner runner(&stack_int, 7); | |
| 79 EXPECT_EQ(0, stack_int); | |
| 80 | |
| 81 DelegateSimpleThread thread(&runner, "int_setter"); | |
| 82 EXPECT_FALSE(thread.HasBeenStarted()); | |
| 83 EXPECT_FALSE(thread.HasBeenJoined()); | |
| 84 EXPECT_EQ(0, stack_int); | |
| 85 | |
| 86 thread.Start(); | |
| 87 EXPECT_TRUE(thread.HasBeenStarted()); | |
| 88 EXPECT_FALSE(thread.HasBeenJoined()); | |
| 89 | |
| 90 thread.Join(); | |
| 91 EXPECT_TRUE(thread.HasBeenStarted()); | |
| 92 EXPECT_TRUE(thread.HasBeenJoined()); | |
| 93 EXPECT_EQ(7, stack_int); | |
| 94 } | |
| 95 | |
| 96 TEST(SimpleThreadTest, WaitForEvent) { | |
| 97 // Create a thread, and wait for it to signal us. | |
| 98 WaitableEvent event(true, false); | |
| 99 | |
| 100 WaitEventRunner runner(&event); | |
| 101 DelegateSimpleThread thread(&runner, "event_waiter"); | |
| 102 | |
| 103 EXPECT_FALSE(event.IsSignaled()); | |
| 104 thread.Start(); | |
| 105 event.Wait(); | |
| 106 EXPECT_TRUE(event.IsSignaled()); | |
| 107 thread.Join(); | |
| 108 } | |
| 109 | |
| 110 TEST(SimpleThreadTest, NamedWithOptions) { | |
| 111 WaitableEvent event(true, false); | |
| 112 | |
| 113 WaitEventRunner runner(&event); | |
| 114 SimpleThread::Options options; | |
| 115 DelegateSimpleThread thread(&runner, "event_waiter", options); | |
| 116 EXPECT_EQ(thread.name_prefix(), "event_waiter"); | |
| 117 EXPECT_FALSE(event.IsSignaled()); | |
| 118 | |
| 119 thread.Start(); | |
| 120 EXPECT_EQ(thread.name_prefix(), "event_waiter"); | |
| 121 EXPECT_EQ(thread.name(), | |
| 122 std::string("event_waiter/") + IntToString(thread.tid())); | |
| 123 event.Wait(); | |
| 124 | |
| 125 EXPECT_TRUE(event.IsSignaled()); | |
| 126 thread.Join(); | |
| 127 | |
| 128 // We keep the name and tid, even after the thread is gone. | |
| 129 EXPECT_EQ(thread.name_prefix(), "event_waiter"); | |
| 130 EXPECT_EQ(thread.name(), | |
| 131 std::string("event_waiter/") + IntToString(thread.tid())); | |
| 132 } | |
| 133 | |
| 134 TEST(SimpleThreadTest, ThreadPool) { | |
| 135 AtomicSequenceNumber seq; | |
| 136 SeqRunner runner(&seq); | |
| 137 DelegateSimpleThreadPool pool("seq_runner", 10); | |
| 138 | |
| 139 // Add work before we're running. | |
| 140 pool.AddWork(&runner, 300); | |
| 141 | |
| 142 EXPECT_EQ(seq.GetNext(), 0); | |
| 143 pool.Start(); | |
| 144 | |
| 145 // Add work while we're running. | |
| 146 pool.AddWork(&runner, 300); | |
| 147 | |
| 148 pool.JoinAll(); | |
| 149 | |
| 150 EXPECT_EQ(seq.GetNext(), 601); | |
| 151 | |
| 152 // We can reuse our pool. Verify that all 10 threads can actually run in | |
| 153 // parallel, so this test will only pass if there are actually 10 threads. | |
| 154 AtomicSequenceNumber seq2; | |
| 155 WaitableEvent event(true, false); | |
| 156 // Changing 9 to 10, for example, would cause us JoinAll() to never return. | |
| 157 VerifyPoolRunner verifier(&seq2, 9, &event); | |
| 158 pool.Start(); | |
| 159 | |
| 160 pool.AddWork(&verifier, 10); | |
| 161 | |
| 162 pool.JoinAll(); | |
| 163 EXPECT_EQ(seq2.GetNext(), 10); | |
| 164 } | |
| 165 | |
| 166 } // namespace base | |
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