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authorGravatar Abseil Team <absl-team@google.com>2017-12-01 12:15:49 -0800
committerGravatar Xiaoyi Zhang <zhangxy988@gmail.com>2017-12-01 15:25:15 -0500
commit8b727aa7aba86ce396da8e4886e40ea3e4357e27 (patch)
treea5d22e038a49860ace2c09238c4cca6574198b10 /absl/synchronization/lifetime_test.cc
parent579f2879acb6ad6e2935cc970399a1e52c1ee9eb (diff)
Changes imported from Abseil "staging" branch:
- 5d8235b05f4ea2b33a138712f463a30b6ae75719 Incorporate PR https://github.com/abseil/abseil-cpp/pull/... by Xiaoyi Zhang <zhangxy@google.com> - f2bc653acdaa983aa2765693476c17cd1142d59b Run the StrSplit WorksWithLargeStrings test in all configs. by Matt Armstrong <marmstrong@google.com> - 43aed1ea7dffcd656e1916c2d5637650fc3a8de3 Incorporate PR https://github.com/abseil/abseil-cpp/pull/... by Xiaoyi Zhang <zhangxy@google.com> - d58511d60904c7090e44638339ba63b97ca96f1a Add a new simple Mutex lifetime test, to be extended later. by Greg Falcon <gfalcon@google.com> - db5c86c186c09ad57963bcbd2b6182f62bce8ed0 Actually use the exception in TestCheckerAtCountdown by Jon Cohen <cohenjon@google.com> - 29c01a72b62d9a4b90f9bd935e3575adbafd85ed Use factories instead of explicitly passing pointers to T... by Jon Cohen <cohenjon@google.com> - 54d5526ee6ab7784992845f6e6e2c7d48ba008a5 Fix uint128 ostream operator and improve ostream test. by Alex Strelnikov <strel@google.com> - 4e49abe7e569cf6bd0eae95ce2b2fe2faa051fa2 Fix documentation: strings::PairFormatter -> absl::PairFo... by Derek Mauro <dmauro@google.com> - 4044297f0e1a8a6c6ae3f781a65080e0d57c6751 Cut the memory used by the StrSplit WorksWithLargeStrings... by Jorg Brown <jorg@google.com> GitOrigin-RevId: 5d8235b05f4ea2b33a138712f463a30b6ae75719 Change-Id: Ib6b6b0161c26e5326b53a126454754e33678eefc
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+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstdlib>
+#include <thread> // NOLINT(build/c++11), Abseil test
+#include <type_traits>
+
+#include "absl/base/attributes.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/synchronization/notification.h"
+
+namespace {
+
+// A two-threaded test which checks that Mutex, CondVar, and Notification have
+// correct basic functionality. The intent is to establish that they
+// function correctly in various phases of construction and destruction.
+//
+// Thread one acquires a lock on 'mutex', wakes thread two via 'notification',
+// then waits for 'state' to be set, as signalled by 'condvar'.
+//
+// Thread two waits on 'notification', then sets 'state' inside the 'mutex',
+// signalling the change via 'condvar'.
+//
+// These tests use ABSL_RAW_CHECK to validate invariants, rather than EXPECT or
+// ASSERT from gUnit, because we need to invoke them during global destructors,
+// when gUnit teardown would have already begun.
+void ThreadOne(absl::Mutex* mutex, absl::CondVar* condvar,
+ absl::Notification* notification, bool* state) {
+ // Test that the notification is in a valid initial state.
+ ABSL_RAW_CHECK(!notification->HasBeenNotified(), "invalid Notification");
+ ABSL_RAW_CHECK(*state == false, "*state not initialized");
+
+ {
+ absl::MutexLock lock(mutex);
+
+ notification->Notify();
+ ABSL_RAW_CHECK(notification->HasBeenNotified(), "invalid Notification");
+
+ while (*state == false) {
+ condvar->Wait(mutex);
+ }
+ }
+}
+
+void ThreadTwo(absl::Mutex* mutex, absl::CondVar* condvar,
+ absl::Notification* notification, bool* state) {
+ ABSL_RAW_CHECK(*state == false, "*state not initialized");
+
+ // Wake thread one
+ notification->WaitForNotification();
+ ABSL_RAW_CHECK(notification->HasBeenNotified(), "invalid Notification");
+ {
+ absl::MutexLock lock(mutex);
+ *state = true;
+ condvar->Signal();
+ }
+}
+
+// Launch thread 1 and thread 2, and block on their completion.
+void RunTests(absl::Mutex* mutex, absl::CondVar* condvar,
+ absl::Notification* notification) {
+ bool state = false;
+ std::thread thread_one(ThreadOne, mutex, condvar, notification, &state);
+ std::thread thread_two(ThreadTwo, mutex, condvar, notification, &state);
+ thread_one.join();
+ thread_two.join();
+}
+
+void TestLocals() {
+ absl::Mutex mutex;
+ absl::CondVar condvar;
+ absl::Notification notification;
+ RunTests(&mutex, &condvar, &notification);
+}
+
+} // namespace
+
+int main() {
+ TestLocals();
+ // Explicitly call exit(0) here, to make it clear that we intend for the
+ // above global object destructors to run.
+ std::exit(0);
+}