1 /* Copyright (c) 2006-2016. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #ifndef SIMGRID_S4U_COND_VARIABLE_HPP
7 #define SIMGRID_S4U_COND_VARIABLE_HPP
10 #include <condition_variable>
13 #include <utility> // std::swap
15 #include <boost/intrusive_ptr.hpp>
19 #include <simgrid/simix.h>
20 #include <simgrid/s4u/mutex.hpp>
27 /** A condition variable
29 * This is based on std::condition_variable and should respect the same
30 * semantic. But we currently use (only) double for both durations and
33 XBT_PUBLIC_CLASS ConditionVariable {
37 ConditionVariable(smx_cond_t cond) : cond_(cond) {}
40 ConditionVariable(ConditionVariable const&) = delete;
41 ConditionVariable& operator=(ConditionVariable const&) = delete;
43 friend XBT_PUBLIC(void) intrusive_ptr_add_ref(ConditionVariable* cond);
44 friend XBT_PUBLIC(void) intrusive_ptr_release(ConditionVariable* cond);
45 using Ptr = boost::intrusive_ptr<ConditionVariable>;
47 static Ptr createConditionVariable();
51 void wait(std::unique_lock<Mutex>& lock);
52 std::cv_status wait_until(std::unique_lock<Mutex>& lock, double timeout_time);
53 std::cv_status wait_for(std::unique_lock<Mutex>& lock, double duration);
55 /** Wait for a given duraiton
57 * This version gives us the ability to do (in C++):
60 * using namespace std::literals::chrono_literals;
62 * cond->wait_for(lock, 1ms);
63 * cond->wait_for(lock, 1s);
64 * cond->wait_for(lock, 1min);
65 * cond->wait_for(lock, 1h);
68 template<class Rep, class Period>
69 std::cv_status wait_for(std::unique_lock<Mutex>& lock, std::chrono::duration<Rep, Period> duration)
71 typedef std::chrono::duration<double> SecondsDouble;
72 auto seconds = std::chrono::duration_cast<SecondsDouble>(duration);
73 return this->wait_for(lock, duration.count());
76 // Variants which takes a predicate:
79 void wait(std::unique_lock<Mutex>& lock, P pred)
85 bool wait_until(std::unique_lock<Mutex>& lock, double timeout_time, P pred)
88 if (this->wait_until(lock, timeout_time) == std::cv_status::timeout)
93 bool wait_for(std::unique_lock<Mutex>& lock, double duration, P pred)
95 return this->wait_until(lock, SIMIX_get_clock() + duration, std::move(pred));
97 template<class Rep, class Period, class P>
98 bool wait_for(std::unique_lock<Mutex>& lock, std::chrono::duration<Rep, Period> duration, P pred)
100 typedef std::chrono::duration<double> SecondsDouble;
101 auto seconds = std::chrono::duration_cast<SecondsDouble>(duration);
102 return this->wait_for(lock, seconds.count(), pred);
110 XBT_ATTRIB_DEPRECATED("Use notify_one() instead")
111 void notify() { notify_one(); }
114 using ConditionVariablePtr = ConditionVariable::Ptr;
116 }} // namespace simgrid::s4u
118 #endif /* SIMGRID_S4U_COND_VARIABLE_HPP */