From 166d71d18f01aa73fd35aae611692320952a75b5 Mon Sep 17 00:00:00 2001
From: Abseil Team <absl-team@google.com>
Date: Tue, 20 Jun 2023 22:03:47 -0700
Subject: absl: add a Mutex::Await/LockWhen test
Check various corner cases for Await/LockWhen return value
with always true/always false conditions.
I don't see this explicitly tested anywhere else.
PiperOrigin-RevId: 542141533
Change-Id: Ia116c6dc199de606ad446c205951169ec5e2abe1
---
absl/synchronization/mutex_test.cc | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
(limited to 'absl/synchronization')
diff --git a/absl/synchronization/mutex_test.cc b/absl/synchronization/mutex_test.cc
index 35802b2e..b585c342 100644
--- a/absl/synchronization/mutex_test.cc
+++ b/absl/synchronization/mutex_test.cc
@@ -1868,4 +1868,29 @@ TEST(Mutex, WriterPriority) {
EXPECT_TRUE(saw_wrote.load());
}
+TEST(Mutex, LockWhenWithTimeoutResult) {
+ // Check various corner cases for Await/LockWhen return value
+ // with always true/always false conditions.
+ absl::Mutex mu;
+ const bool kAlwaysTrue = true, kAlwaysFalse = false;
+ const absl::Condition kTrueCond(&kAlwaysTrue), kFalseCond(&kAlwaysFalse);
+ EXPECT_TRUE(mu.LockWhenWithTimeout(kTrueCond, absl::Milliseconds(1)));
+ mu.Unlock();
+ EXPECT_FALSE(mu.LockWhenWithTimeout(kFalseCond, absl::Milliseconds(1)));
+ EXPECT_TRUE(mu.AwaitWithTimeout(kTrueCond, absl::Milliseconds(1)));
+ EXPECT_FALSE(mu.AwaitWithTimeout(kFalseCond, absl::Milliseconds(1)));
+ std::thread th1([&]() {
+ EXPECT_TRUE(mu.LockWhenWithTimeout(kTrueCond, absl::Milliseconds(1)));
+ mu.Unlock();
+ });
+ std::thread th2([&]() {
+ EXPECT_FALSE(mu.LockWhenWithTimeout(kFalseCond, absl::Milliseconds(1)));
+ mu.Unlock();
+ });
+ absl::SleepFor(absl::Milliseconds(100));
+ mu.Unlock();
+ th1.join();
+ th2.join();
+}
+
} // namespace
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