libcruft-util/test/job/queue.cpp

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///////////////////////////////////////////////////////////////////////////////
#include "job/queue.hpp"
#include "tap.hpp"
#include <chrono>
#include <iostream>
///////////////////////////////////////////////////////////////////////////////
void sleep_inc (std::atomic<int> &count) noexcept
{
++count;
}
///////////////////////////////////////////////////////////////////////////////
int
main (void)
{
util::TAP::logger tap;
// dispatch `INNER' simple jobs `OUTTER' times that simply increment an
// atomic variable and quit. this tests that all threads are created,
// executed, and finished. it's not definitive, but executing this many
// items this many times seems reasonably reliable in exposing deadlocks.
bool success = true;
constexpr int OUTTER = 4;
constexpr int INNER = 1<<10;
for (auto i = 0; i < OUTTER && success; ++i) {
std::atomic<int> count = 0;
{
util::job::queue q {std::thread::hardware_concurrency (), INNER};
std::vector<util::job::queue::cookie> cookies;
for (int j = 0; j < INNER; ++j) {
cookies.push_back (
q.submit (
sleep_inc,
std::ref (count)
)
);
}
}
success = count == INNER && success;
}
tap.expect (success, "%! trivial increment jobs of size %!", OUTTER, INNER);
return tap.status ();
}