return cond_ != nullptr;
}
- /**
- * Wait functions
- */
+ // Wait functions:
+
void wait(std::unique_lock<Mutex>& lock);
- // TODO, return std::cv_status
+ std::cv_status wait_until(std::unique_lock<Mutex>& lock, double timeout_time);
std::cv_status wait_for(std::unique_lock<Mutex>& lock, double duration);
- // TODO, wait_until
- /** Variant which takes a predice */
+ // Variants which takes a predicate:
+
template<class P>
void wait(std::unique_lock<Mutex>& lock, P pred)
{
while (!pred())
wait(lock);
}
+ template<class P>
+ bool wait_until(std::unique_lock<Mutex>& lock, double timeout_time, P pred)
+ {
+ while (!pred())
+ if (this->wait_until(lock, timeout_time) == std::cv_status::timeout)
+ return pred();
+ return true;
+ }
+ template<class P>
+ bool wait_for(std::unique_lock<Mutex>& lock, double duration, P pred)
+ {
+ return this->wait_until(lock, SIMIX_get_clock() + duration, std::move(pred));
+ }
- // TODO, return std::cv_status
- // TODO,wait_until
+ // Notify functions
- /**
- * Notify functions
- */
void notify();
void notify_all();
void s4u::ConditionVariable::wait(std::unique_lock<Mutex>& lock) {
simcall_cond_wait(cond_, lock.mutex()->mutex_);
}
-
+
std::cv_status s4u::ConditionVariable::wait_for(std::unique_lock<Mutex>& lock, double timeout) {
try {
simcall_cond_wait_timeout(cond_, lock.mutex()->mutex_, timeout);
return std::cv_status::timeout;
}
catch (xbt_ex& e) {
+
+ // If the exception was a timeout, we have to take the lock again:
if (e.category == timeout_error) {
- // We have to take the lock:
try {
lock.mutex()->lock();
+ return std::cv_status::timeout;
}
catch (...) {
std::terminate();
}
- return std::cv_status::timeout;
}
+
+ // Another exception: should we reaquire the lock?
std::terminate();
}
catch (...) {
std::terminate();
}
}
+
+std::cv_status s4u::ConditionVariable::wait_until(std::unique_lock<Mutex>& lock, double timeout_time)
+{
+ double now = SIMIX_get_clock();
+ double timeout;
+ if (timeout_time < now)
+ timeout = 0.0;
+ else
+ timeout = timeout_time - now;
+ return this->wait_for(lock, timeout);
+}
/**
* Notify functions