unsigned int pull()
{
int stage = _stage.load( std::memory_order_relaxed );
bool changed = _state[stage].changed.load( std::memory_order_relaxed );
if( changed )
{
_state[_out].changed.store( false, std::memory_order_relaxed );
_out = _stage.exchange( _out, std::memory_order_acquire );
return _state[_out].frames;
}
return 0;
}
void *thread_func(void *ptr)
{
int self = (int)(size_t)(ptr);
for (int i = 0; i < 1000; ++i) {
auto newitem = new Item();
newitem->value = (self * 1000) + i;
auto old = last.exchange(newitem);
if (!old) {
liststart = newitem;
} else {
old->next = newitem;
}
sched_yield();
}
return NULL;
}
void push( unsigned int frames )
{
_state[_in].frames = frames;
_state[_in].changed.store( true, boost::memory_order_relaxed );
_in = _stage.exchange( _in, boost::memory_order_release );
}
bool deactivate_()
{ return ACTIVE == state_.exchange( DEACTIVE); }
