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/chrono.hpp>
21 #include <simgrid/s4u/Mutex.hpp>
26 /** @brief A condition variable
29 * This is a drop-in replacement of `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();
49 // Wait functions without time:
51 void wait(std::unique_lock<Mutex>& lock);
53 void wait(std::unique_lock<Mutex>& lock, P pred)
59 // Wait function taking a plain double as time:
61 std::cv_status wait_until(std::unique_lock<Mutex>& lock, double timeout_time);
62 std::cv_status wait_for(std::unique_lock<Mutex>& lock, double duration);
64 bool wait_until(std::unique_lock<Mutex>& lock, double timeout_time, P pred)
67 if (this->wait_until(lock, timeout_time) == std::cv_status::timeout)
72 bool wait_for(std::unique_lock<Mutex>& lock, double duration, P pred)
74 return this->wait_until(lock, SIMIX_get_clock() + duration, std::move(pred));
77 // Wait function taking a C++ style time:
79 template<class Rep, class Period, class P>
81 std::unique_lock<Mutex>& lock, std::chrono::duration<Rep, Period> duration,
84 auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
85 return this->wait_for(lock, seconds.count(), pred);
87 template<class Rep, class Period>
88 std::cv_status wait_for(
89 std::unique_lock<Mutex>& lock, std::chrono::duration<Rep, Period> duration)
91 auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
92 return this->wait_for(lock, seconds.count());
94 template<class Duration>
95 std::cv_status wait_until(std::unique_lock<Mutex>& lock,
96 const SimulationTimePoint<Duration>& timeout_time)
98 auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
99 return this->wait_until(lock, timeout_native.time_since_epoch().count());
101 template<class Duration, class P>
102 bool wait_until(std::unique_lock<Mutex>& lock,
103 const SimulationTimePoint<Duration>& timeout_time, P pred)
105 auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
106 return this->wait_until(lock, timeout_native.time_since_epoch().count(),
115 XBT_ATTRIB_DEPRECATED("Use notify_one() instead")
116 void notify() { notify_one(); }
119 using ConditionVariablePtr = ConditionVariable::Ptr;
121 }} // namespace simgrid::s4u
123 #endif /* SIMGRID_S4U_COND_VARIABLE_HPP */