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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. 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.
*/
/*
* Copyright 2021 ScyllaDB
*/
#include <exception>
#include <functional>
#include <seastar/core/coroutine.hh>
#include <seastar/core/gate.hh>
#include <seastar/core/format.hh>
#include <seastar/core/sstring.hh>
#include <seastar/util/log.hh>
#include <seastar/testing/test_case.hh>
#include <seastar/testing/thread_test_case.hh>
using namespace seastar;
static_assert(std::is_nothrow_default_constructible_v<gate>);
static_assert(std::is_nothrow_move_constructible_v<gate>);
static_assert(std::is_nothrow_move_assignable_v<gate>);
static_assert(std::is_nothrow_default_constructible_v<named_gate>);
static_assert(std::is_nothrow_move_constructible_v<named_gate>);
static_assert(std::is_nothrow_move_assignable_v<named_gate>);
template <typename Func>
static future<> check_gate_closed_exception(Func func) {
try {
co_await futurize_invoke(func);
BOOST_FAIL("func was expected to throw gate_closed_exception");
} catch (const gate_closed_exception& e) {
BOOST_REQUIRE_EQUAL(e.what(), "gate closed");
} catch (...) {
BOOST_FAIL(format("unexpected exception: {}", std::current_exception()));
}
}
SEASTAR_TEST_CASE(basic_gate_test) {
gate g;
BOOST_REQUIRE_EQUAL(g.get_count(), 0);
BOOST_REQUIRE(!g.is_closed());
BOOST_REQUIRE_NO_THROW(g.check());
BOOST_REQUIRE_EQUAL(g.get_count(), 0);
BOOST_REQUIRE_NO_THROW(g.enter());
BOOST_REQUIRE_EQUAL(g.get_count(), 1);
auto gh0 = g.try_hold();
BOOST_REQUIRE(gh0.has_value());
BOOST_REQUIRE_EQUAL(g.get_count(), 2);
auto gh1 = g.hold();
BOOST_REQUIRE_EQUAL(g.get_count(), 3);
BOOST_REQUIRE(!g.is_closed());
auto f = g.close();
BOOST_REQUIRE(!f.available());
g.leave();
BOOST_REQUIRE_EQUAL(g.get_count(), 2);
gh0->release();
BOOST_REQUIRE_EQUAL(g.get_count(), 1);
gh1.release();
BOOST_REQUIRE_EQUAL(g.get_count(), 0);
BOOST_REQUIRE_NO_THROW(co_await std::move(f));
BOOST_REQUIRE(g.is_closed());
}
SEASTAR_TEST_CASE(gate_closed_test) {
gate g;
BOOST_REQUIRE(!g.is_closed());
BOOST_REQUIRE_NO_THROW(g.check());
BOOST_REQUIRE_NO_THROW(g.enter());
auto gh0 = g.try_hold();
BOOST_REQUIRE(gh0.has_value());
auto gh1 = g.hold();
BOOST_REQUIRE(!g.is_closed());
auto f = g.close();
BOOST_REQUIRE(!f.available());
g.leave();
gh0->release();
gh1.release();
BOOST_REQUIRE_NO_THROW(co_await std::move(f));
BOOST_REQUIRE(g.is_closed());
BOOST_REQUIRE(!g.try_hold().has_value());
co_await check_gate_closed_exception([&] { g.check(); });
co_await check_gate_closed_exception([&] { g.enter(); });
co_await check_gate_closed_exception([&] { g.hold(); });
co_await check_gate_closed_exception([&] () -> future<> { co_await with_gate(g, [] { return make_ready_future(); }); });
co_await check_gate_closed_exception([&] () -> future<> { co_await try_with_gate(g, [] { return make_ready_future(); }); });
}
template <typename Func>
static future<> check_named_gate_closed_exception(Func func, sstring name) {
try {
co_await futurize_invoke(func);
BOOST_FAIL("func was expected to throw gate_closed_exception");
} catch (const gate_closed_exception& e) {
BOOST_REQUIRE_EQUAL(e.what(), fmt::format("{} gate closed", name));
} catch (...) {
BOOST_FAIL(format("unexpected exception: {}", std::current_exception()));
}
}
SEASTAR_TEST_CASE(named_gate_closed_test) {
auto test_named_gate = [] (named_gate& g, const sstring name) -> future<> {
if (!g.is_closed()) {
BOOST_REQUIRE_NO_THROW(g.check());
BOOST_REQUIRE_NO_THROW(g.enter());
auto gh0 = g.try_hold();
BOOST_REQUIRE(gh0.has_value());
auto gh1 = g.hold();
BOOST_REQUIRE(!g.is_closed());
auto f = g.close();
BOOST_REQUIRE(!f.available());
g.leave();
gh0->release();
gh1.release();
BOOST_REQUIRE_NO_THROW(co_await std::move(f));
BOOST_REQUIRE(g.is_closed());
}
BOOST_REQUIRE(!g.try_hold().has_value());
co_await check_named_gate_closed_exception([&] { g.check(); }, name);
co_await check_named_gate_closed_exception([&] { g.enter(); }, name);
co_await check_named_gate_closed_exception([&] { g.hold(); }, name);
co_await check_named_gate_closed_exception([&] () -> future<> { co_await with_gate(g, [] { return make_ready_future(); }); }, name);
co_await check_named_gate_closed_exception([&] () -> future<> { co_await try_with_gate(g, [] { return make_ready_future(); }); }, name);
};
BOOST_TEST_MESSAGE("test_named_gate(default_constructed)");
named_gate default_constructed;
co_await test_named_gate(default_constructed, "named");
sstring foo = "foo";
BOOST_TEST_MESSAGE("test_named_gate(name_constructed)");
named_gate name_constructed(foo);
co_await test_named_gate(name_constructed, foo);
BOOST_TEST_MESSAGE("test_named_gate(move_constructed)");
auto move_constructed = std::move(name_constructed);
co_await test_named_gate(move_constructed, foo);
BOOST_TEST_MESSAGE("test_named_gate(move_assigned)");
sstring bar = "bar";
named_gate move_assigned(foo);
move_assigned = named_gate(bar);
co_await test_named_gate(move_assigned, bar);
}
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