本文整理汇总了C++中Selectable::enabled方法的典型用法代码示例。如果您正苦于以下问题：C++ Selectable::enabled方法的具体用法？C++ Selectable::enabled怎么用？C++ Selectable::enabled使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Selectable的用法示例。
在下文中一共展示了Selectable::enabled方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: waitUntil
bool SelectorImpl::waitUntil(Timespan until)
{
if (!_avail.empty())
until = Timespan(0);
if (_isDirty)
{
_pollfds.clear();
// recalculate size
size_t pollSize= 1;
std::set<Selectable*>::iterator iter;
for( iter= _devices.begin(); iter != _devices.end(); ++iter)
{
if( (*iter)->enabled() )
pollSize+= (*iter)->simpl().pollSize();
}
pollfd pfd;
pfd.fd = -1;
pfd.events = 0;
pfd.revents = 0;
_pollfds.assign(pollSize, pfd);
// add entries
pollfd* pCurr= &_pollfds[0];
// insert event pipe
pCurr->fd = _wakePipe[0];
pCurr->events = POLLIN;
++pCurr;
for( iter= _devices.begin(); iter != _devices.end(); ++iter)
{
if( (*iter)->enabled() )
{
const size_t availableSpace= &_pollfds.back() - pCurr + 1;
size_t required = (*iter)->simpl().pollSize();
assert( required <= availableSpace);
pCurr+= (*iter)->simpl().initializePoll( pCurr, required);
}
}
_isDirty= false;
}
#ifdef HAVE_PPOLL
struct timespec pollTimeout = { 0, 0 };
struct timespec* pollTimeoutP = 0;
if (until >= Timespan(0))
pollTimeoutP = &pollTimeout;
#else
int pollTimeout = until == Timespan(0) ? 0 : -1;
#endif
int ret = -1;
while (true)
{
if (until > Timespan(0))
{
Timespan remaining = until - Timespan::gettimeofday();
if (remaining < Timespan(0))
remaining = Timespan(0);
#ifdef HAVE_PPOLL
pollTimeout.tv_sec = remaining.totalUSecs() / 1000000;
pollTimeout.tv_nsec = (remaining.totalUSecs() % 1000000) * 1000;
#else
if (Milliseconds(remaining) >= std::numeric_limits<int>::max())
pollTimeout = std::numeric_limits<int>::max();
else
pollTimeout = Milliseconds(remaining).ceil();
#endif
log_debug("remaining " << remaining);
}
else
log_debug("no timeout");
#ifdef HAVE_PPOLL
log_debug("ppoll with " << _pollfds.size() << " fds, timeout=" << pollTimeout.tv_sec << "s " << pollTimeout.tv_nsec << "ns");
ret = ::ppoll(&_pollfds[0], _pollfds.size(), pollTimeoutP, 0);
log_debug("ppoll returns " << ret);
#else
log_debug("poll with " << _pollfds.size() << " fds, timeout=" << pollTimeout << "ms");
ret = ::poll(&_pollfds[0], _pollfds.size(), pollTimeout);
log_debug("poll returns " << ret);
#endif
if( ret != -1 )
break;
if( errno != EINTR )
throw IOError("Could not poll on file descriptors");
}
if( ret == 0 && _avail.empty() )
//.........这里部分代码省略.........