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.
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"
15 class SetIntRunner : public DelegateSimpleThread::Delegate {
17 SetIntRunner(int* ptr, int val) : ptr_(ptr), val_(val) { }
18 virtual ~SetIntRunner() { }
20 virtual void Run() OVERRIDE {
29 class WaitEventRunner : public DelegateSimpleThread::Delegate {
31 explicit WaitEventRunner(WaitableEvent* event) : event_(event) { }
32 virtual ~WaitEventRunner() { }
34 virtual void Run() OVERRIDE {
35 EXPECT_FALSE(event_->IsSignaled());
37 EXPECT_TRUE(event_->IsSignaled());
40 WaitableEvent* event_;
43 class SeqRunner : public DelegateSimpleThread::Delegate {
45 explicit SeqRunner(AtomicSequenceNumber* seq) : seq_(seq) { }
46 virtual void Run() OVERRIDE {
51 AtomicSequenceNumber* seq_;
54 // We count up on a sequence number, firing on the event when we've hit our
55 // expected amount, otherwise we wait on the event. This will ensure that we
56 // have all threads outstanding until we hit our expected thread pool size.
57 class VerifyPoolRunner : public DelegateSimpleThread::Delegate {
59 VerifyPoolRunner(AtomicSequenceNumber* seq,
60 int total, WaitableEvent* event)
61 : seq_(seq), total_(total), event_(event) { }
63 virtual void Run() OVERRIDE {
64 if (seq_->GetNext() == total_) {
72 AtomicSequenceNumber* seq_;
74 WaitableEvent* event_;
79 TEST(SimpleThreadTest, CreateAndJoin) {
82 SetIntRunner runner(&stack_int, 7);
83 EXPECT_EQ(0, stack_int);
85 DelegateSimpleThread thread(&runner, "int_setter");
86 EXPECT_FALSE(thread.HasBeenStarted());
87 EXPECT_FALSE(thread.HasBeenJoined());
88 EXPECT_EQ(0, stack_int);
91 EXPECT_TRUE(thread.HasBeenStarted());
92 EXPECT_FALSE(thread.HasBeenJoined());
95 EXPECT_TRUE(thread.HasBeenStarted());
96 EXPECT_TRUE(thread.HasBeenJoined());
97 EXPECT_EQ(7, stack_int);
100 TEST(SimpleThreadTest, WaitForEvent) {
101 // Create a thread, and wait for it to signal us.
102 WaitableEvent event(true, false);
104 WaitEventRunner runner(&event);
105 DelegateSimpleThread thread(&runner, "event_waiter");
107 EXPECT_FALSE(event.IsSignaled());
110 EXPECT_TRUE(event.IsSignaled());
114 TEST(SimpleThreadTest, NamedWithOptions) {
115 WaitableEvent event(true, false);
117 WaitEventRunner runner(&event);
118 SimpleThread::Options options;
119 DelegateSimpleThread thread(&runner, "event_waiter", options);
120 EXPECT_EQ(thread.name_prefix(), "event_waiter");
121 EXPECT_FALSE(event.IsSignaled());
124 EXPECT_EQ(thread.name_prefix(), "event_waiter");
125 EXPECT_EQ(thread.name(),
126 std::string("event_waiter/") + IntToString(thread.tid()));
129 EXPECT_TRUE(event.IsSignaled());
132 // We keep the name and tid, even after the thread is gone.
133 EXPECT_EQ(thread.name_prefix(), "event_waiter");
134 EXPECT_EQ(thread.name(),
135 std::string("event_waiter/") + IntToString(thread.tid()));
138 TEST(SimpleThreadTest, ThreadPool) {
139 AtomicSequenceNumber seq;
140 SeqRunner runner(&seq);
141 DelegateSimpleThreadPool pool("seq_runner", 10);
143 // Add work before we're running.
144 pool.AddWork(&runner, 300);
146 EXPECT_EQ(seq.GetNext(), 0);
149 // Add work while we're running.
150 pool.AddWork(&runner, 300);
154 EXPECT_EQ(seq.GetNext(), 601);
156 // We can reuse our pool. Verify that all 10 threads can actually run in
157 // parallel, so this test will only pass if there are actually 10 threads.
158 AtomicSequenceNumber seq2;
159 WaitableEvent event(true, false);
160 // Changing 9 to 10, for example, would cause us JoinAll() to never return.
161 VerifyPoolRunner verifier(&seq2, 9, &event);
164 pool.AddWork(&verifier, 10);
167 EXPECT_EQ(seq2.GetNext(), 10);