1 // Copyright 2013 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/barrier_closure.h"
6
7 #include "base/bind.h"
8 #include "testing/gtest/include/gtest/gtest.h"
9
10 namespace {
11
Increment(int * count)12 void Increment(int* count) { (*count)++; }
13
TEST(BarrierClosureTest,RunImmediatelyForZeroClosures)14 TEST(BarrierClosureTest, RunImmediatelyForZeroClosures) {
15 int count = 0;
16 base::Closure done_closure(base::Bind(&Increment, base::Unretained(&count)));
17
18 base::Closure barrier_closure = base::BarrierClosure(0, done_closure);
19 EXPECT_EQ(1, count);
20 }
21
TEST(BarrierClosureTest,RunAfterNumClosures)22 TEST(BarrierClosureTest, RunAfterNumClosures) {
23 int count = 0;
24 base::Closure done_closure(base::Bind(&Increment, base::Unretained(&count)));
25
26 base::Closure barrier_closure = base::BarrierClosure(2, done_closure);
27 EXPECT_EQ(0, count);
28
29 barrier_closure.Run();
30 EXPECT_EQ(0, count);
31
32 barrier_closure.Run();
33 EXPECT_EQ(1, count);
34 }
35
36 class DestructionIndicator {
37 public:
38 // Sets |*destructed| to true in destructor.
DestructionIndicator(bool * destructed)39 DestructionIndicator(bool* destructed) : destructed_(destructed) {
40 *destructed_ = false;
41 }
42
~DestructionIndicator()43 ~DestructionIndicator() { *destructed_ = true; }
44
DoNothing()45 void DoNothing() {}
46
47 private:
48 bool* destructed_;
49 };
50
TEST(BarrierClosureTest,ReleasesDoneClosureWhenDone)51 TEST(BarrierClosureTest, ReleasesDoneClosureWhenDone) {
52 bool done_destructed = false;
53 base::Closure barrier_closure = base::BarrierClosure(
54 1,
55 base::BindOnce(&DestructionIndicator::DoNothing,
56 base::Owned(new DestructionIndicator(&done_destructed))));
57 EXPECT_FALSE(done_destructed);
58 barrier_closure.Run();
59 EXPECT_TRUE(done_destructed);
60 }
61
ResetBarrierClosure(base::Closure * closure)62 void ResetBarrierClosure(base::Closure* closure) {
63 *closure = base::Closure();
64 }
65
66 // Tests a case when |done_closure| resets a |barrier_closure|.
67 // |barrier_closure| is a Closure holding the |done_closure|. |done_closure|
68 // holds a pointer back to the |barrier_closure|. When |barrier_closure| is
69 // Run() it calls ResetBarrierClosure() which erases the |barrier_closure| while
70 // still inside of its Run(). The Run() implementation (in base::BarrierClosure)
71 // must not try use itself after executing ResetBarrierClosure() or this test
72 // would crash inside Run().
TEST(BarrierClosureTest,KeepingClosureAliveUntilDone)73 TEST(BarrierClosureTest, KeepingClosureAliveUntilDone) {
74 base::Closure barrier_closure;
75 base::Closure done_closure =
76 base::Bind(ResetBarrierClosure, &barrier_closure);
77 barrier_closure = base::BarrierClosure(1, done_closure);
78 barrier_closure.Run();
79 }
80
81 } // namespace
82