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// file : unit-tests/scheduler/driver.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <chrono>
#include <thread>
#include <cassert>
#include <iostream>
#include <build2/types>
#include <build2/utility>
#include <build2/scheduler>
using namespace std;
namespace build2
{
// Usage argv[0] <max-active-threads>
//
int
main (int argc, char* argv[])
{
bool verb (false);
size_t max_active (0);
if (argc > 1)
{
verb = true;
max_active = stoul (argv[1]);
}
if (max_active == 0)
max_active = scheduler::hardware_concurrency ();
scheduler s (max_active);
auto inner = [] (size_t x, size_t y, size_t& out)
{
out = x + y;
this_thread::sleep_for (chrono::microseconds (out * 10));
};
auto outer = [&s, &inner] (size_t n, size_t& out)
{
vector<size_t> result (2 * n, 0);
scheduler::atomic_count task_count (0);
for (size_t i (0); i != 2 * n; ++i)
{
s.async (task_count,
inner,
i,
i,
std::ref (result[i]));
}
s.wait (task_count);
assert (task_count == 0);
for (size_t i (0); i != n; ++i)
out += result[i];
this_thread::sleep_for (chrono::microseconds (out * 10));
};
const size_t tasks (50);
vector<size_t> result (tasks, 0);
scheduler::atomic_count task_count (0);
for (size_t i (0); i != tasks; ++i)
{
s.async (task_count,
outer,
i,
std::ref (result[i]));
}
s.wait (task_count);
assert (task_count == 0);
scheduler::stat st (s.shutdown ());
if (verb)
{
cerr << "thread_max_active " << st.thread_max_active << endl
<< "thread_max_total " << st.thread_max_total << endl
<< "thread_helpers " << st.thread_helpers << endl
<< "thread_max_waiting " << st.thread_max_waiting << endl
<< endl
<< "task_queue_depth " << st.task_queue_depth << endl
<< "task_queue_full " << st.task_queue_full << endl
<< endl
<< "wait_queue_slots " << st.wait_queue_slots << endl
<< "wait_queue_collisions " << st.wait_queue_collisions << endl;
}
return 0;
}
}
int
main (int argc, char* argv[])
{
return build2::main (argc, argv);
}
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