{

std::vector< int > drawlist( 10 );

while ( 1 )

{

if( tNeedUpdate )

{

RLockThis;

if( rLock.owns_lock() || rLock.try_lock_for( chrono::milliseconds{ 1 } ) )

{

using std::swap;

swap( drawlist, t_randi );

tNeedUpdate = false;

}

else

cout << "abandon this update" << endl;

}

::system( "cls" );

for( auto &i : drawlist )

cout << i << endl;

this_thread::sleep_for( chrono::milliseconds{ 50 } );

}

{

std::vector< int > databuf( 10 );

while ( 1 )

{

this_thread::sleep_for( chrono::milliseconds{ 300 } );

for( auto &i : databuf )

i = Randi( 1, 100 );

WLockThis;

using std::swap;

swap( t_randi, databuf );

tNeedUpdate = true;

this_thread::sleep_for( chrono::milliseconds{ 10 } );

}

{

thread scheduler( TSchedule );

thread render( TRender );

scheduler.detach();

render.detach();

while ( 1 ) // mainloop

this_thread::sleep_for( chrono::milliseconds{ 1 } );

}