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/*
* Copyright (c) 2015, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <pthread.h>
#include <iostream>
#include "lock.h"
#include "macro.h"
#include "gtest/gtest.h"
#include "utils/conditional_variable.h"
namespace test {
namespace components {
namespace utils {
class ConditionalVariableTest : public ::testing::Test {
public:
ConditionalVariableTest() : test_value_("initialized"), counter_(0) {}
void check_counter();
void task_one();
static void* check_counter_helper(void* context) {
(reinterpret_cast<ConditionalVariableTest*>(context))->check_counter();
return NULL;
}
static void* task_one_helper(void* context) {
(reinterpret_cast<ConditionalVariableTest*>(context))->task_one();
return NULL;
}
protected:
std::string test_value_;
sync_primitives::ConditionalVariable cond_var_;
sync_primitives::Lock test_mutex_;
unsigned counter_;
};
// Defines threads behaviour which depends on counter value
void ConditionalVariableTest::check_counter() {
sync_primitives::AutoLock test_lock(test_mutex_);
if (counter_ <= 1) {
counter_++;
cond_var_.Wait(
test_mutex_); // Mutex unlock & Thread sleeps until Notification
} else if (counter_ == 2) { // Checking for equal 2 in this specific case.
// Because we were waiting for 2 threads to be
// finished
cond_var_
.Broadcast(); // Notify All threads waiting on conditional variable
}
}
// Tasks for threads to begin with
void ConditionalVariableTest::task_one() {
sync_primitives::AutoLock test_lock(test_mutex_);
test_value_ = "changed by thread 1";
cond_var_.NotifyOne(); // Notify At least one thread waiting on conditional
// variable
test_value_ = "changed again by thread 1";
}
TEST_F(ConditionalVariableTest,
CheckNotifyOne_OneThreadNotified_ExpectSuccessful) {
pthread_t thread1;
sync_primitives::AutoLock test_lock(test_mutex_);
test_value_ = "changed by main thread";
const bool thread_created = pthread_create(
&thread1, NULL, &ConditionalVariableTest::task_one_helper, this);
ASSERT_FALSE(thread_created) << "thread1 is not created!";
test_value_ = "changed twice by main thread";
cond_var_.WaitFor(test_lock, 2000);
std::string last_value("changed again by thread 1");
EXPECT_EQ(last_value, test_value_);
}
TEST_F(ConditionalVariableTest,
CheckBroadcast_AllThreadsNotified_ExpectSuccessful) {
pthread_t thread1;
pthread_t thread2;
bool thread_created = pthread_create(
&thread1, NULL, &ConditionalVariableTest::check_counter_helper, this);
ASSERT_FALSE(thread_created) << "thread1 is not created!";
thread_created = pthread_create(
&thread2, NULL, &ConditionalVariableTest::check_counter_helper, this);
ASSERT_FALSE(thread_created) << "thread2 is not created!";
check_counter();
EXPECT_EQ(2u, counter_);
}
TEST_F(
ConditionalVariableTest,
CheckWaitForWithTimeout1sec_ThreadBlockedForTimeout_ExpectSuccessfulWakeUp) {
sync_primitives::AutoLock test_lock(test_mutex_);
sync_primitives::ConditionalVariable::WaitStatus wait_st =
cond_var_.WaitFor(test_lock, 1000);
EXPECT_EQ(sync_primitives::ConditionalVariable::kTimeout, wait_st);
}
} // namespace utils
} // namespace components
} // namespace test
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