67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
|
|
* 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
|
|
*
|
|
* 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 2018 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
#include "job/flag.hpp"
|
|
#include "job/spinlock.hpp"
|
|
#include "tap.hpp"
|
|
|
|
#include <thread>
|
|
#include <mutex>
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
void
|
|
fight (util::job::flag &start, util::job::spinlock &l, int iterations)
|
|
{
|
|
start.wait ();
|
|
for (int count = 0; count < iterations; ++count)
|
|
std::lock_guard g (l);
|
|
};
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
int
|
|
main ()
|
|
{
|
|
util::TAP::logger tap;
|
|
|
|
util::job::spinlock l;
|
|
l.lock ();
|
|
tap.expect (true, "locked without contention");
|
|
|
|
l.unlock ();
|
|
tap.expect (true, "unlocked without contention");
|
|
|
|
if (std::thread::hardware_concurrency () < 2) {
|
|
tap.skip ("n-way fight");
|
|
} else {
|
|
constexpr int iterations = 1 << 12;
|
|
util::job::flag start_flag;
|
|
|
|
std::vector<std::thread> contestants;
|
|
for (unsigned i = 0; i < std::thread::hardware_concurrency (); ++i)
|
|
contestants.emplace_back (fight, std::ref (start_flag), std::ref (l), iterations);
|
|
|
|
start_flag.notify ();
|
|
|
|
for (auto &t: contestants)
|
|
t.join ();
|
|
|
|
tap.expect (true, "n-way fight, %! contestants", std::thread::hardware_concurrency ());
|
|
}
|
|
|
|
return tap.status ();
|
|
} |