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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "System/ThreadPool.h"
#include "System/Log/ILog.h"
#include "System/UnsyncedRNG.h"
#include <boost/thread/future.hpp>
#include <vector>
#include <atomic>
#define BOOST_TEST_MODULE ThreadPool
#include <boost/test/unit_test.hpp>
static int NUM_THREADS = std::min(ThreadPool::GetMaxThreads(), 10);
// !!! BOOST.TEST IS NOT THREADSAFE !!! (facepalms)
#define SAFE_BOOST_CHECK( P ) do { boost::lock_guard<boost::mutex> _(m); BOOST_CHECK( ( P ) ); } while( 0 );
static boost::mutex m;
BOOST_AUTO_TEST_CASE( testThreadPool1 )
{
LOG_L(L_WARNING, "testThreadPool1");
#define RUNS 5000
std::atomic<int> cnt(0);
BOOST_CHECK(cnt.is_lock_free());
std::vector<int> nums(RUNS,0);
std::vector<int> runs(NUM_THREADS,0);
ThreadPool::SetThreadCount(NUM_THREADS);
BOOST_CHECK(ThreadPool::GetNumThreads() == NUM_THREADS);
for_mt(0, RUNS, 2, [&](const int i) {
const int threadnum = ThreadPool::GetThreadNum();
SAFE_BOOST_CHECK(threadnum < NUM_THREADS);
SAFE_BOOST_CHECK(threadnum >= 0);
runs[threadnum]++;
nums[i] = 1;
++cnt;
});
BOOST_CHECK(cnt == RUNS / 2);
int rounds = 0;
for(int i=0; i<runs.size(); i++) {
rounds += runs[i];
}
BOOST_CHECK(rounds == (RUNS/2));
for(int i=0; i<RUNS; i++) {
BOOST_CHECK((i % 2) == (1 - nums[i]));
}
}
BOOST_AUTO_TEST_CASE( testThreadPool2 )
{
LOG_L(L_WARNING, "testThreadPool2");
std::vector<int> runs(NUM_THREADS);
parallel([&]{
const int threadnum = ThreadPool::GetThreadNum();
SAFE_BOOST_CHECK(threadnum >= 0);
SAFE_BOOST_CHECK(threadnum < NUM_THREADS);
runs[threadnum]++;
});
for(int i=0; i<NUM_THREADS; i++) {
BOOST_CHECK(runs[i] == 1);
}
}
BOOST_AUTO_TEST_CASE( testThreadPool3 )
{
LOG_L(L_WARNING, "testThreadPool3");
int result = parallel_reduce([]() -> int {
const int threadnum = ThreadPool::GetThreadNum();
SAFE_BOOST_CHECK(threadnum >= 0);
SAFE_BOOST_CHECK(threadnum < NUM_THREADS);
return threadnum;
}, [](int a, boost::unique_future<int>& b) -> int { return a + b.get(); });
BOOST_CHECK(result == ((NUM_THREADS-1)*((NUM_THREADS-1) + 1))/2);
}
BOOST_AUTO_TEST_CASE( testThreadPool4 )
{
LOG_L(L_WARNING, "testThreadPool4");
for_mt(0, 100, [&](const int y) {
for_mt(0, 100, [&](const int x) {
const int threadnum = ThreadPool::GetThreadNum();
SAFE_BOOST_CHECK(threadnum < NUM_THREADS);
SAFE_BOOST_CHECK(threadnum >= 0);
});
});
}
BOOST_AUTO_TEST_CASE( testThreadPool5 )
{
/*parallel([&]{
parallel([&]{
const int threadnum = ThreadPool::GetThreadNum();
SAFE_BOOST_CHECK(threadnum >= 0);
SAFE_BOOST_CHECK(threadnum < NUM_THREADS);
});
});*/
}
BOOST_AUTO_TEST_CASE( testThreadPool6 )
{
/*for_mt(0, 100, [&](const int i) {
throw std::exception();
});*/
}
BOOST_AUTO_TEST_CASE( testThreadPool7 )
{
LOG_L(L_WARNING, "testThreadPool7");
std::vector<UnsyncedRNG> rngs(NUM_THREADS);
for (unsigned int n = 0; n < rngs.size(); n++)
rngs[n].Seed(n);
for_mt(0, 1000000, [&](const int i) {
const float r = rngs[ThreadPool::GetThreadNum()].RandFloat() * 1000.0f;
const float s = math::sqrt(r); // test SSE intrinsics (should be 100% reentrant)
SAFE_BOOST_CHECK(!std::isinf(s));
SAFE_BOOST_CHECK(!std::isnan(s));
});
}
struct do_once {
do_once() {}
~do_once() {
// workarround boost::condition_variable::~condition_variable(): Assertion `!ret' failed.
ThreadPool::SetThreadCount(1);
}
};
BOOST_GLOBAL_FIXTURE(do_once);
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