wownero/tests/unit_tests/thread_group.cpp

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// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. 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.
//
// 3. Neither the name of the copyright holder 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 "gtest/gtest.h"
#include <atomic>
#include "common/task_region.h"
#include "common/thread_group.h"
TEST(ThreadGroup, NoThreads)
{
tools::task_region(tools::thread_group(0), [] (tools::task_region_handle& region) {
std::atomic<bool> completed{false};
region.run([&] { completed = true; });
EXPECT_TRUE(completed);
});
{
tools::thread_group group(0);
std::atomic<bool> completed{false};
group.dispatch([&] { completed = true; });
EXPECT_TRUE(completed);
}
}
TEST(ThreadGroup, OneThread)
{
tools::thread_group group(1);
for (unsigned i = 0; i < 3; ++i) {
std::atomic<bool> completed{false};
tools::task_region(group, [&] (tools::task_region_handle& region) {
region.run([&] { completed = true; });
});
EXPECT_TRUE(completed);
}
}
TEST(ThreadGroup, UseActiveThreadOnSync)
{
tools::thread_group group(1);
for (unsigned i = 0; i < 3; ++i) {
std::atomic<bool> completed{false};
tools::task_region(group, [&] (tools::task_region_handle& region) {
region.run([&] { while (!completed); });
region.run([&] { completed = true; });
});
EXPECT_TRUE(completed);
}
}
TEST(ThreadGroup, InOrder)
{
tools::thread_group group(1);
for (unsigned i = 0; i < 3; ++i) {
std::atomic<unsigned> count{0};
std::atomic<bool> completed{false};
tools::task_region(group, [&] (tools::task_region_handle& region) {
region.run([&] { while (!completed); });
region.run([&] { if (count == 0) completed = true; });
region.run([&] { ++count; });
});
EXPECT_TRUE(completed);
EXPECT_EQ(1u, count);
}
}
TEST(ThreadGroup, TwoThreads)
{
tools::thread_group group(2);
for (unsigned i = 0; i < 3; ++i) {
std::atomic<bool> completed{false};
tools::task_region(group, [&] (tools::task_region_handle& region) {
region.run([&] { while (!completed); });
region.run([&] { while (!completed); });
region.run([&] { completed = true; });
});
EXPECT_TRUE(completed);
}
}
TEST(ThreadGroup, Nested) {
struct fib {
unsigned operator()(tools::thread_group& group, unsigned value) const {
if (value == 0 || value == 1) {
return value;
}
unsigned left = 0;
unsigned right = 0;
tools::task_region(group, [&, value] (tools::task_region_handle& region) {
region.run([&, value] { left = fib{}(group, value - 1); });
region.run([&, value] { right = fib{}(group, value - 2); } );
});
return left + right;
}
unsigned operator()(tools::thread_group&& group, unsigned value) const {
return (*this)(group, value);
}
};
// be careful of depth on asynchronous version
EXPECT_EQ(6765, fib{}(tools::thread_group(0), 20));
EXPECT_EQ(377, fib{}(tools::thread_group(1), 14));
}
TEST(ThreadGroup, Many)
{
tools::thread_group group(1);
for (unsigned i = 0; i < 3; ++i) {
std::atomic<unsigned> count{0};
tools::task_region(group, [&] (tools::task_region_handle& region) {
for (unsigned tasks = 0; tasks < 1000; ++tasks) {
region.run([&] { ++count; });
}
});
EXPECT_EQ(1000u, count);
}
}
TEST(ThreadGroup, ThrowInTaskRegion)
{
class test_exception final : std::exception {
public:
explicit test_exception() : std::exception() {}
virtual const char* what() const noexcept override {
return "test_exception";
}
};
tools::thread_group group(1);
for (unsigned i = 0; i < 3; ++i) {
std::atomic<unsigned> count{0};
EXPECT_THROW(
[&] {
tools::task_region(group, [&] (tools::task_region_handle& region) {
for (unsigned tasks = 0; tasks < 1000; ++tasks) {
region.run([&] { ++count; });
}
throw test_exception();
});
}(),
test_exception
);
EXPECT_GE(1000u, count);
}
}