void synchronize(std::size_t generation_value, Lock& l,
char const* function_name = "base_and_gate<>::synchronize",
error_code& ec= throws)
{
HPX_ASSERT_OWNS_LOCK(l);
if (generation_value < generation_)
{
HPX_THROWS_IF(ec, hpx::invalid_status, function_name,
"sequencing error, generational counter too small");
return;
}
// make sure this set operation has not arrived ahead of time
if (!test_condition(generation_value))
{
conditional_trigger c;
manage_condition cond(*this, c);
future<void> f = cond.get_future(util::bind(
&base_trigger::test_condition, this, generation_value));
{
hpx::util::unlock_guard<Lock> ul(l);
f.get();
} // make sure lock gets re-acquired
}
if (&ec != &throws)
ec = make_success_code();
}
cv_status wait_until(std::unique_lock<mutex>& lock,
util::steady_time_point const& abs_time,
error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
util::ignore_while_checking<std::unique_lock<mutex> > il(&lock);
std::unique_lock<mutex_type> l(mtx_);
util::unlock_guard<std::unique_lock<mutex> > unlock(lock);
threads::thread_state_ex_enum const reason =
cond_.wait_until(l, abs_time, ec);
// We need to ignore our internal mutex for the user provided lock
// being able to be reacquired without a lock held during suspension
// error. We can't use RAII here since the guard object would get
// destructed before the unlock_guard.
hpx::util::ignore_lock(&mtx_);
if (ec) return cv_status::error;
// if the timer has hit, the waiting period timed out
return (reason == threads::wait_timeout) ? //-V110
cv_status::timeout : cv_status::no_timeout;
}
std::int64_t signal_all(std::unique_lock<mutex_type> l)
{
HPX_ASSERT_OWNS_LOCK(l);
std::int64_t count = static_cast<std::int64_t>(cond_.size(l));
signal(std::move(l), count);
return count;
}
void wait(Lock& lock, Predicate pred, error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
while (!pred())
{
wait(lock);
}
}
void wait(std::unique_lock<mutex_type>& l, std::int64_t count)
{
HPX_ASSERT_OWNS_LOCK(l);
while (value_ < count)
{
cond_.wait(l, "counting_semaphore::wait");
}
value_ -= count;
}
void wait(std::unique_lock<mutex>& lock, Predicate pred,
error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
while (!pred())
{
wait(lock);
}
}
void wait(std::unique_lock<mutex>& lock, error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
util::ignore_all_while_checking ignore_lock;
std::unique_lock<mutex_type> l(mtx_);
util::unlock_guard<std::unique_lock<mutex> > unlock(lock);
cond_.wait(std::move(l), ec);
}
bool try_wait(std::unique_lock<mutex_type>& l, std::int64_t count = 1)
{
HPX_ASSERT_OWNS_LOCK(l);
if (!(value_ < count)) {
// enter wait_locked only if there are sufficient credits
// available
wait(l, count);
return true;
}
return false;
}
bool wait_until(Lock& lock, util::steady_time_point const& abs_time,
Predicate pred, error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
while (!pred())
{
if (wait_until(lock, abs_time, ec) == cv_status::timeout)
return pred();
}
return true;
}
void wait(std::unique_lock<mutex>& lock, error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
util::ignore_while_checking<std::unique_lock<mutex> > il(&lock);
std::unique_lock<mutex_type> l(mtx_);
util::unlock_guard<std::unique_lock<mutex> > unlock(lock);
cond_.wait(l, ec);
// We need to ignore our internal mutex for the user provided lock
// being able to be reacquired without a lock held during suspension
// error. We can't use RAII here since the guard object would get
// destructed before the unlock_guard.
hpx::util::ignore_lock(&mtx_);
}
gid_type split_credits_for_gid_locked(
std::unique_lock<gid_type::mutex_type>& l, gid_type& id)
{
HPX_ASSERT_OWNS_LOCK(l);
std::uint16_t log2credits = get_log2credit_from_gid(id);
HPX_ASSERT(log2credits > 0);
gid_type newid = id; // strips lock-bit
set_log2credit_for_gid(id, log2credits-1);
set_credit_split_mask_for_gid(id);
set_log2credit_for_gid(newid, log2credits-1);
set_credit_split_mask_for_gid(newid);
return newid;
}
void signal(std::unique_lock<mutex_type> l, std::int64_t count)
{
HPX_ASSERT_OWNS_LOCK(l);
mutex_type* mtx = l.mutex();
// release no more threads than we get resources
value_ += count;
for (std::int64_t i = 0; value_ >= 0 && i < count; ++i)
{
// notify_one() returns false if no more threads are
// waiting
if (!cond_.notify_one(std::move(l)))
break;
l = std::unique_lock<mutex_type>(*mtx);
}
}
cv_status wait_until(std::unique_lock<mutex>& lock,
util::steady_time_point const& abs_time,
error_code& ec = throws)
{
HPX_ASSERT_OWNS_LOCK(lock);
util::ignore_all_while_checking ignore_lock;
std::unique_lock<mutex_type> l(mtx_);
util::unlock_guard<std::unique_lock<mutex> > unlock(lock);
threads::thread_state_ex_enum const reason =
cond_.wait_until(std::move(l), abs_time, ec);
if (ec) return cv_status::error;
// if the timer has hit, the waiting period timed out
return (reason == threads::wait_timeout) ? //-V110
cv_status::timeout : cv_status::no_timeout;
}
