1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
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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 <thread> |
6 | |
7 | #include "flutter/fml/synchronization/semaphore.h" |
8 | #include "gtest/gtest.h" |
9 | |
10 | TEST(SemaphoreTest, SimpleValidity) { |
11 | fml::Semaphore sem(100); |
12 | ASSERT_TRUE(sem.IsValid()); |
13 | } |
14 | |
15 | TEST(SemaphoreTest, WaitOnZero) { |
16 | fml::Semaphore sem(0); |
17 | ASSERT_FALSE(sem.TryWait()); |
18 | } |
19 | |
20 | TEST(SemaphoreTest, WaitOnZeroSignalThenWait) { |
21 | fml::Semaphore sem(0); |
22 | ASSERT_FALSE(sem.TryWait()); |
23 | std::thread thread([&sem]() { sem.Signal(); }); |
24 | thread.join(); |
25 | ASSERT_TRUE(sem.TryWait()); |
26 | ASSERT_FALSE(sem.TryWait()); |
27 | } |
28 |