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// Copyright 2021 The Pigweed 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
//
// https://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 "gtest/gtest.h"
#include "pw_sync/binary_semaphore.h"
#include "pw_thread/id.h"
#include "pw_thread/non_portable_test_thread_options.h"
#include "pw_thread/thread.h"
using pw::thread::test::TestOptionsThread0;
using pw::thread::test::TestOptionsThread1;
using pw::thread::test::WaitUntilDetachedThreadsCleanedUp;
namespace pw::thread {
namespace {
TEST(Thread, DefaultIds) {
Thread not_executing_thread;
EXPECT_EQ(not_executing_thread.get_id(), Id());
}
static void ReleaseBinarySemaphore(void* arg) {
static_cast<sync::BinarySemaphore*>(arg)->release();
}
#if PW_THREAD_JOINING_ENABLED
TEST(Thread, Join) {
Thread thread;
EXPECT_FALSE(thread.joinable());
sync::BinarySemaphore thread_ran_sem;
thread =
Thread(TestOptionsThread0(), ReleaseBinarySemaphore, &thread_ran_sem);
EXPECT_TRUE(thread.joinable());
thread.join();
EXPECT_EQ(thread.get_id(), Id());
EXPECT_TRUE(thread_ran_sem.try_acquire());
}
#endif // PW_THREAD_JOINING_ENABLED
TEST(Thread, Detach) {
Thread thread;
sync::BinarySemaphore thread_ran_sem;
thread =
Thread(TestOptionsThread0(), ReleaseBinarySemaphore, &thread_ran_sem);
EXPECT_NE(thread.get_id(), Id());
EXPECT_TRUE(thread.joinable());
thread.detach();
EXPECT_EQ(thread.get_id(), Id());
EXPECT_FALSE(thread.joinable());
thread_ran_sem.acquire();
WaitUntilDetachedThreadsCleanedUp();
}
TEST(Thread, SwapWithoutExecution) {
Thread thread_0;
Thread thread_1;
// Make sure we can swap threads which are not associated with any execution.
thread_0.swap(thread_1);
}
TEST(Thread, SwapWithOneExecuting) {
Thread thread_0;
EXPECT_EQ(thread_0.get_id(), Id());
sync::BinarySemaphore thread_ran_sem;
Thread thread_1(
TestOptionsThread1(), ReleaseBinarySemaphore, &thread_ran_sem);
EXPECT_NE(thread_1.get_id(), Id());
thread_0.swap(thread_1);
EXPECT_NE(thread_0.get_id(), Id());
EXPECT_EQ(thread_1.get_id(), Id());
thread_0.detach();
EXPECT_EQ(thread_0.get_id(), Id());
thread_ran_sem.acquire();
WaitUntilDetachedThreadsCleanedUp();
}
TEST(Thread, SwapWithTwoExecuting) {
sync::BinarySemaphore thread_a_ran_sem;
Thread thread_0(
TestOptionsThread0(), ReleaseBinarySemaphore, &thread_a_ran_sem);
sync::BinarySemaphore thread_b_ran_sem;
Thread thread_1(
TestOptionsThread1(), ReleaseBinarySemaphore, &thread_b_ran_sem);
const Id thread_a_id = thread_0.get_id();
EXPECT_NE(thread_a_id, Id());
const Id thread_b_id = thread_1.get_id();
EXPECT_NE(thread_b_id, Id());
EXPECT_NE(thread_a_id, thread_b_id);
thread_0.swap(thread_1);
EXPECT_EQ(thread_1.get_id(), thread_a_id);
EXPECT_EQ(thread_0.get_id(), thread_b_id);
thread_0.detach();
EXPECT_EQ(thread_0.get_id(), Id());
thread_1.detach();
EXPECT_EQ(thread_1.get_id(), Id());
thread_a_ran_sem.acquire();
thread_b_ran_sem.acquire();
WaitUntilDetachedThreadsCleanedUp();
}
TEST(Thread, MoveOperator) {
Thread thread_0;
EXPECT_EQ(thread_0.get_id(), Id());
sync::BinarySemaphore thread_ran_sem;
Thread thread_1(
TestOptionsThread1(), ReleaseBinarySemaphore, &thread_ran_sem);
EXPECT_NE(thread_1.get_id(), Id());
thread_0 = std::move(thread_1);
EXPECT_NE(thread_0.get_id(), Id());
#ifndef __clang_analyzer__
EXPECT_EQ(thread_1.get_id(), Id());
#endif // ignore use-after-move
thread_0.detach();
EXPECT_EQ(thread_0.get_id(), Id());
thread_ran_sem.acquire();
WaitUntilDetachedThreadsCleanedUp();
}
class SemaphoreReleaser : public ThreadCore {
public:
pw::sync::BinarySemaphore& semaphore() { return semaphore_; }
private:
void Run() override { semaphore_.release(); }
sync::BinarySemaphore semaphore_;
};
TEST(Thread, ThreadCore) {
SemaphoreReleaser semaphore_releaser;
Thread thread(TestOptionsThread0(), semaphore_releaser);
EXPECT_NE(thread.get_id(), Id());
EXPECT_TRUE(thread.joinable());
thread.detach();
EXPECT_EQ(thread.get_id(), Id());
EXPECT_FALSE(thread.joinable());
semaphore_releaser.semaphore().acquire();
WaitUntilDetachedThreadsCleanedUp();
}
} // namespace
} // namespace pw::thread
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