void GoApp::check_for_computed_move()
{
//return;
if (game_status != COMPUTER_THINKING) {
return;
}
auto status = computed_move.wait_for(std::chrono::seconds(0));
if (status == std::future_status::ready) {
try {
auto move = computed_move.get();
state.do_move(move);
// Are there any more moves possible?
if (state.get_moves().empty()) {
game_status = GAME_OVER;
}
else {
next_player();
}
} catch (std::exception& error) {
game_status = GAME_ERROR;
error_string = error.what();
}
}
}
int factorial1(std::future<int>& f)
{
int n = f.get();
int result = 1;
for (int i = 1; i <= n; ++i)
result *= i;
return result;
}
/**
* Close the task. This will raise in this thread any exception the
* task generated in the other thread. Calling this function is
* optional, because the destructor will also call this function.
* But because it can throw an exception, it is better to call it
* explicitly.
*/
void close() {
// If an exception happened in the task, re-throw
// it in this thread. This will block if the task
// isn't finished.
if (m_future.valid()) {
m_future.get();
}
// Make sure task is done.
if (m_thread.joinable()) {
m_thread.join();
}
}
void handleFuture( std::future< _2Real::BlockResult > &obj, std::string const& info = "" )
{
obj.wait();
_2Real::BlockResult val = obj.get();
switch ( val )
{
case _2Real::BlockResult::CARRIED_OUT:
std::cout << "---- " << info << " was carried out" << std::endl;
break;
case _2Real::BlockResult::IGNORED:
std::cout << "---- " << info << " was ignored" << std::endl;
break;
}
}
std::pair<long double, int> getResult(
std::chrono::system_clock::time_point deadline, int maxPrecision)
{
long double result = 1;
int precision = 1;
if (std::chrono::system_clock::now() < deadline) {
while (precision < maxPrecision) {
const int nextPrecision = std::min(maxPrecision, precision * 2);
future = std::async(std::launch::async, compute, nextPrecision);
if (future.wait_until(deadline) == std::future_status::timeout)
break;
result = future.get();
precision = nextPrecision;
}
}
return { result, precision };
}
/**
* Get the header data from the file.
*
* @returns Header.
* @throws Some form of osmium::io_error if there is an error.
*/
osmium::io::Header header() {
if (m_status == status::error) {
throw io_error("Can not get header from reader when in status 'error'");
}
try {
if (m_header_future.valid()) {
m_header = m_header_future.get();
if (m_read_which_entities == osmium::osm_entity_bits::nothing) {
m_status = status::eof;
}
}
} catch (...) {
close();
m_status = status::error;
throw;
}
return m_header;
}
//========================================================================
void CSirServer::NotifyResult(CLIENT* client, std::future<SCRESULT>& result)
{
SCRESULT rc = result.get();
stringstream ss;
switch (rc)
{
case SCR_SUCCESS:
ss << "OK";
break;
case SCR_TIMEOUT:
ss << "TIMEOUT";
break;
default:
ss << "ERROR";
break;
}
ss << std::endl;
Notify(client, ss.str());
}
void on_update(const UpdateEvent & e) override
{
// Around 60 fps
if (fixedTimer.milliseconds().count() >= 16 && turret.fired)
{
float timestep_ms = fixedTimer.milliseconds().count() / 1000.f;
turret.projectile.fixed_update(timestep_ms);
std::cout << timestep_ms << std::endl;
//std::cout << turret.projectile.p.position << std::endl;
fixedTimer.reset();
}
cameraController.update(e.timestep_ms);
time += e.timestep_ms;
shaderMonitor.handle_recompile();
// If a new mesh is ready, retrieve it
if (pointerFuture.valid())
{
auto status = pointerFuture.wait_for(std::chrono::seconds(0));
if (status != std::future_status::timeout)
{
auto m = pointerFuture.get();
supershape = m;
supershape.pose.position = {0, 2, -2};
pointerFuture = {};
}
}
// If we don't currently have a background task, begin working on the next mesh
if (!pointerFuture.valid() && regeneratePointer)
{
pointerFuture = std::async([]() {
return make_supershape_3d(16, ssM, ssN1, ssN2, ssN3);
});
}
}
TEST_F(DBusConnectionTest, LibdbusConnectionsMayCommitSuicide) {
const ::DBusBusType libdbusType = ::DBusBusType::DBUS_BUS_SESSION;
::DBusError libdbusError;
dbus_error_init(&libdbusError);
::DBusConnection* libdbusConnection = dbus_bus_get_private(libdbusType, &libdbusError);
assert(libdbusConnection);
dbus_connection_set_exit_on_disconnect(libdbusConnection, false);
auto dispatchThread = std::thread(&dispatch, libdbusConnection);
::DBusMessage* libdbusMessageCall = dbus_message_new_method_call(
"org.freedesktop.DBus",
"/org/freedesktop/DBus",
"org.freedesktop.DBus",
"ListNames");
dbus_message_set_signature(libdbusMessageCall, "");
DBusPendingCall* libdbusPendingCall;
dbus_connection_send_with_reply(
libdbusConnection,
libdbusMessageCall,
&libdbusPendingCall,
500);
dbus_pending_call_set_notify(
libdbusPendingCall,
notifyThunk,
libdbusConnection,
NULL);
ASSERT_EQ(true, future.get());
dispatchThread.join();
}
BOOST_AUTO_TEST_CASE(future, *boost::unit_test::timeout(15))
{
using boost::unit_test::framework::master_test_suite;
boost::asio::io_context ios;
std::future<int> fut = bp::async_system(
ios, boost::asio::use_future,
master_test_suite().argv[1],
"test", "--exit-code", "42");
ios.run();
int exit_code = 0;
BOOST_CHECK_NO_THROW(exit_code = fut.get());
BOOST_CHECK_EQUAL(exit_code, 42);
}
BOOST_AUTO_TEST_CASE(future_error, *boost::unit_test::timeout(15))
{
using boost::unit_test::framework::master_test_suite;
boost::asio::io_context ios;
std::future<int> fut = bp::async_system(
ios, boost::asio::use_future,
"invalid-command");
ios.run();
// return from thread
int getNum2(std::future<int> &f) {
print("In getNum1");
return f.get() + 10;
}
/**
* Check task for exceptions.
*
* If an exception happened in the task, re-throw it in this
* thread. This will not do anything if there was no exception.
*/
void check_for_exception() {
if (m_future.valid() && m_future.wait_for(std::chrono::seconds(0)) == std::future_status::ready) {
m_future.get();
}
}
void test(std::future<int>& input) {
std::cout << input.get() << std::endl;
}
inline void wait_until_done(std::future<T>& future) {
if (future.valid()) {
future.get();
}
}
inline void check_for_exception(std::future<T>& future) {
if (future.valid() && future.wait_for(std::chrono::seconds(0)) == std::future_status::ready) {
future.get();
}
}
void s(std::future<double>& fut)
{
double x = fut.get();
std::cout << " fut = " << x << std::endl;
}
void hook_post_step()
{
parent_t::hook_post_step(); // includes output
this->mem->barrier();
if (this->rank == 0)
{
// assuring previous async step finished ...
#if defined(STD_FUTURE_WORKS)
if (
params.async &&
this->timestep != 0 && // ... but not in first timestep ...
((this->timestep - 1) % this->outfreq != 0) // ... and not after diag call
//!((this->timestep-1) == 0 || ((this->timestep-1) % this->outfreq == 0 && (this->timestep-1) >= this->spinup)) // .. and not after diag
) {
assert(ftr.valid());
ftr.get();
} else assert(!ftr.valid());
#endif
// running synchronous stuff
prtcls->step_sync(
params.cloudph_opts,
make_arrinfo(this->mem->advectee(ix::th)),
make_arrinfo(this->mem->advectee(ix::rv))
);
// running asynchronous stuff
{
using libcloudphxx::lgrngn::particles_t;
using libcloudphxx::lgrngn::CUDA;
using libcloudphxx::lgrngn::multi_CUDA;
#if defined(STD_FUTURE_WORKS)
if (params.async)
{
assert(!ftr.valid());
if(params.backend == multi_CUDA)
ftr = std::async(
std::launch::async,
&particles_t<real_t, multi_CUDA>::step_async,
dynamic_cast<particles_t<real_t, multi_CUDA>*>(prtcls.get()),
params.cloudph_opts
);
else if(params.backend == CUDA)
ftr = std::async(
std::launch::async,
&particles_t<real_t, CUDA>::step_async,
dynamic_cast<particles_t<real_t, CUDA>*>(prtcls.get()),
params.cloudph_opts
);
assert(ftr.valid());
} else
#endif
prtcls->step_async(params.cloudph_opts);
}
// performing diagnostics
//if (this->timestep == 0 || (this->timestep % this->outfreq == 0 && this->timestep >= this->spinup))
if (this->timestep % this->outfreq == 0)
{
#if defined(STD_FUTURE_WORKS)
if (params.async)
{
assert(ftr.valid());
ftr.get();
}
#endif
diag();
}
}
this->mem->barrier();
}
int testnum = 100;
int testnum2 = 1000;
int testnum3 = 10000;
string teststr = "asdf";
std::future<int> ret1 = tp.AddTask(IncreNum, 120 );
std::future<void> ret2 = tp.AddTask(test2, teststr );
std::future<int> ret3 = tp.AddTask(FindPrime, 1000);
typedef decltype(FindPrime(10000)) retType;
std::future< retType > ret4 = tp.AddTask(FindPrime, 10000);
std::future<void> ret5 = tp.AddTask(IncreNumRefSelfTask, ptp, std::ref(testnum));
tp.RunThreads();
int primes1 = ret3.get();
retType primes2 = ret4.get();
ret5.get();
int increRet = ret1.get();
cout<<"Number of primes under 1000: "<<primes1<<endl;
cout<<"Number of primes under 10000: "<<primes2<<endl;
SECTION( "Task Results" ) {
CHECK( primes1 == 168 );
CHECK( primes2 == 1229 );
CHECK( testnum == 102 );
CHECK( increRet == 121 );
}
std::this_thread::sleep_for(std::chrono::milliseconds(2000));
/*** http://www.cnblogs.com/haippy/p/3280643.html
promise对象可以保存某一类型T的值，该值可被future对象读取（可能在另外一个线程中），因此promise也提供了一种线程同步的手段。
在promise对象构造时可以和一个共享状态（通常是std::future）相关联，并可以在相关联的共享状态(std::future)上保存一个类型为 T 的值。
可以通过 get_future 来获取与该 promise 对象相关联的 future 对象，调用该函数之后，两个对象共享相同的共享状态(shared state):
promise 对象是异步 Provider，它可以在某一时刻设置共享状态的值。
future 对象可以异步返回共享状态的值，或者在必要的情况下阻塞调用者并等待共享状态标志变为 ready，然后才能获取共享状态的值。
***/
void print_int(std::future<int>& fut) {
int x = fut.get(); // 获取共享状态的值.
std::cout << "value: " << x << '\n'; // value: 10.
}
void helper(std::future<void>& task, ray_tracing::Semaphore& semaphore)
{
task.get();
semaphore.increase();
}
void thread_pool::handle_task(std::future<void> f) {
f.get();
}
void gridding_barrier() {
if (gridding_future.valid())
gridding_future.get(); //Block until result becomes available
}
