1 /* Copyright (c) 2006-2018. 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
9 #include <simgrid/chrono.hpp>
10 #include <simgrid/s4u/Mutex.hpp>
17 /** @brief A condition variable
20 * This is a drop-in replacement of `std::condition_variable` and should respect the same
21 * semantic. But we currently use (only) double for both durations and
24 class XBT_PUBLIC ConditionVariable {
26 friend simgrid::kernel::activity::ConditionVariableImpl;
29 explicit ConditionVariable(smx_cond_t cond) : cond_(cond) {}
31 ConditionVariable(ConditionVariable const&) = delete;
32 ConditionVariable& operator=(ConditionVariable const&) = delete;
34 friend XBT_PUBLIC void intrusive_ptr_add_ref(ConditionVariable * cond);
35 friend XBT_PUBLIC void intrusive_ptr_release(ConditionVariable * cond);
37 static ConditionVariablePtr create();
39 /** @deprecated See Comm::get_mailbox() */
40 XBT_ATTRIB_DEPRECATED_v323("Please use Comm::get_mailbox()") ConditionVariablePtr createConditionVariable()
45 // Wait functions without time:
47 void wait(MutexPtr lock);
48 void wait(std::unique_lock<Mutex> & lock);
49 template <class P> void wait(std::unique_lock<Mutex> & lock, P pred)
55 // Wait function taking a plain double as time:
57 std::cv_status wait_until(std::unique_lock<Mutex> & lock, double timeout_time);
58 std::cv_status wait_for(std::unique_lock<Mutex> & lock, double duration);
59 template <class P> bool wait_until(std::unique_lock<Mutex> & lock, double timeout_time, P pred)
62 if (this->wait_until(lock, timeout_time) == std::cv_status::timeout)
66 template <class P> bool wait_for(std::unique_lock<Mutex> & lock, double duration, P pred)
68 return this->wait_until(lock, SIMIX_get_clock() + duration, std::move(pred));
71 // Wait function taking a C++ style time:
73 template <class Rep, class Period, class P>
74 bool wait_for(std::unique_lock<Mutex> & lock, std::chrono::duration<Rep, Period> duration, P pred)
76 auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
77 return this->wait_for(lock, seconds.count(), pred);
79 template <class Rep, class Period>
80 std::cv_status wait_for(std::unique_lock<Mutex> & lock, std::chrono::duration<Rep, Period> duration)
82 auto seconds = std::chrono::duration_cast<SimulationClockDuration>(duration);
83 return this->wait_for(lock, seconds.count());
85 template <class Duration>
86 std::cv_status wait_until(std::unique_lock<Mutex> & lock, const SimulationTimePoint<Duration>& timeout_time)
88 auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
89 return this->wait_until(lock, timeout_native.time_since_epoch().count());
91 template <class Duration, class P>
92 bool wait_until(std::unique_lock<Mutex> & lock, const SimulationTimePoint<Duration>& timeout_time, P pred)
94 auto timeout_native = std::chrono::time_point_cast<SimulationClockDuration>(timeout_time);
95 return this->wait_until(lock, timeout_native.time_since_epoch().count(), std::move(pred));
105 } // namespace simgrid::s4u