--- /dev/null
+/* Copyright (c) 2006-2020. The SimGrid Team. All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <mutex> /* std::mutex and std::lock_guard */
+#include <simgrid/s4u.hpp> /* All of S4U */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "a sample log category");
+
+simgrid::s4u::MutexPtr mtx = nullptr;
+simgrid::s4u::ConditionVariablePtr cv = nullptr;
+bool ready = false;
+
+static void competitor(int id)
+{
+ XBT_INFO("Entering the race...");
+ std::unique_lock<simgrid::s4u::Mutex> lck(*mtx);
+ while (!ready) {
+ auto now = simgrid::s4u::Engine::get_clock();
+ if (cv->wait_until(lck, now + (id+1)*0.25) == std::cv_status::timeout) {
+ XBT_INFO("Out of wait_until (timeout)");
+ }
+ else {
+ XBT_INFO("Out of wait_until (YAY!)");
+ }
+ }
+ XBT_INFO("Running!");
+}
+
+static void go()
+{
+ XBT_INFO("Are you ready? ...");
+ simgrid::s4u::this_actor::sleep_for(3);
+ {
+ std::unique_lock<simgrid::s4u::Mutex> lck(*mtx);
+ XBT_INFO("Go go go!");
+ ready = true;
+ cv->notify_all();
+ }
+}
+
+static void main_actor()
+{
+ mtx = simgrid::s4u::Mutex::create();
+ cv = simgrid::s4u::ConditionVariable::create();
+
+ auto host = simgrid::s4u::this_actor::get_host();
+ for (int i = 0; i < 10; ++i)
+ simgrid::s4u::Actor::create("competitor", host, competitor, i);
+ simgrid::s4u::Actor::create("go", host, go);
+}
+
+int main(int argc, char* argv[])
+{
+ simgrid::s4u::Engine e(&argc, argv);
+ e.load_platform("../../platforms/small_platform.xml");
+
+ auto host = simgrid::s4u::Host::by_name("Tremblay");
+ simgrid::s4u::Actor::create("main", host, main_actor);
+
+ e.run();
+ return 0;
+}
--- /dev/null
+#!/usr/bin/env tesh
+
+$ ${bindir:=.}/s4u-synchro-condition-variable-waituntil "--log=root.fmt:[%10.6r]%e(%i:%P@%h)%e%m%n"
+> [ 0.000000] (2:competitor@Tremblay) Entering the race...
+> [ 0.000000] (3:competitor@Tremblay) Entering the race...
+> [ 0.000000] (4:competitor@Tremblay) Entering the race...
+> [ 0.000000] (5:competitor@Tremblay) Entering the race...
+> [ 0.000000] (6:competitor@Tremblay) Entering the race...
+> [ 0.000000] (7:competitor@Tremblay) Entering the race...
+> [ 0.000000] (8:competitor@Tremblay) Entering the race...
+> [ 0.000000] (9:competitor@Tremblay) Entering the race...
+> [ 0.000000] (10:competitor@Tremblay) Entering the race...
+> [ 0.000000] (11:competitor@Tremblay) Entering the race...
+> [ 0.000000] (12:go@Tremblay) Are you ready? ...
+> [ 0.250000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 0.500000] (3:competitor@Tremblay) Out of wait_until (timeout)
+> [ 0.500000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 0.750000] (4:competitor@Tremblay) Out of wait_until (timeout)
+> [ 0.750000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.000000] (5:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.000000] (3:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.000000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.250000] (6:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.250000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.500000] (7:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.500000] (4:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.500000] (3:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.500000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.750000] (8:competitor@Tremblay) Out of wait_until (timeout)
+> [ 1.750000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.000000] (9:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.000000] (5:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.000000] (3:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.000000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.250000] (10:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.250000] (4:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.250000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.500000] (11:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.500000] (6:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.500000] (3:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.500000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 2.750000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 3.000000] (12:go@Tremblay) Go go go!
+> [ 3.000000] (7:competitor@Tremblay) Out of wait_until (timeout)
+> [ 3.000000] (7:competitor@Tremblay) Running!
+> [ 3.000000] (5:competitor@Tremblay) Out of wait_until (timeout)
+> [ 3.000000] (5:competitor@Tremblay) Running!
+> [ 3.000000] (4:competitor@Tremblay) Out of wait_until (timeout)
+> [ 3.000000] (4:competitor@Tremblay) Running!
+> [ 3.000000] (3:competitor@Tremblay) Out of wait_until (timeout)
+> [ 3.000000] (3:competitor@Tremblay) Running!
+> [ 3.000000] (2:competitor@Tremblay) Out of wait_until (timeout)
+> [ 3.000000] (2:competitor@Tremblay) Running!
+> [ 3.000000] (8:competitor@Tremblay) Out of wait_until (YAY!)
+> [ 3.000000] (8:competitor@Tremblay) Running!
+> [ 3.000000] (9:competitor@Tremblay) Out of wait_until (YAY!)
+> [ 3.000000] (9:competitor@Tremblay) Running!
+> [ 3.000000] (10:competitor@Tremblay) Out of wait_until (YAY!)
+> [ 3.000000] (10:competitor@Tremblay) Running!
+> [ 3.000000] (11:competitor@Tremblay) Out of wait_until (YAY!)
+> [ 3.000000] (11:competitor@Tremblay) Running!
+> [ 3.000000] (6:competitor@Tremblay) Out of wait_until (YAY!)
+> [ 3.000000] (6:competitor@Tremblay) Running!