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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/util/foregroundtaskexecutor.h>
#include <vespa/vespalib/testkit/testapp.h>
#include <condition_variable>
#include <unistd.h>
#include <vespa/log/log.h>
LOG_SETUP("foregroundtaskexecutor_test");
namespace vespalib {
class Fixture
{
public:
ForegroundTaskExecutor _threads;
Fixture()
: _threads()
{
}
};
class TestObj
{
public:
std::mutex _m;
std::condition_variable _cv;
int _done;
int _fail;
int _val;
TestObj() noexcept
: _m(),
_cv(),
_done(0),
_fail(0),
_val(0)
{
}
void
modify(int oldValue, int newValue)
{
{
std::lock_guard<std::mutex> guard(_m);
if (_val == oldValue) {
_val = newValue;
} else {
++_fail;
}
++_done;
}
_cv.notify_all();
}
void
wait(int wantDone)
{
std::unique_lock<std::mutex> guard(_m);
_cv.wait(guard, [this, wantDone] { return this->_done >= wantDone; });
}
};
TEST_F("testExecute", Fixture) {
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(1, [=]() { tv->modify(0, 42); });
tv->wait(1);
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
}
TEST_F("require that task with same id are serialized", Fixture)
{
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(0, [=]() { usleep(2000); tv->modify(0, 14); });
f._threads.execute(0, [=]() { tv->modify(14, 42); });
tv->wait(2);
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(0, tv->_fail);
EXPECT_EQUAL(42, tv->_val);
}
TEST_F("require that task with different ids are serialized", Fixture)
{
int tryCnt = 0;
for (tryCnt = 0; tryCnt < 100; ++tryCnt) {
std::shared_ptr<TestObj> tv(std::make_shared<TestObj>());
EXPECT_EQUAL(0, tv->_val);
f._threads.execute(0, [=]() { usleep(2000); tv->modify(0, 14); });
f._threads.execute(1, [=]() { tv->modify(14, 42); });
tv->wait(2);
if (tv->_fail != 1) {
continue;
}
EXPECT_EQUAL(1, tv->_fail);
EXPECT_EQUAL(14, tv->_val);
f._threads.sync_all();
EXPECT_EQUAL(1, tv->_fail);
EXPECT_EQUAL(14, tv->_val);
break;
}
EXPECT_TRUE(tryCnt >= 100);
}
}
TEST_MAIN() { TEST_RUN_ALL(); }
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