* under the terms of the license (GNU LGPL) which comes with this package. */
#include "simgrid/s4u.hpp"
+#include <vector>
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
-simgrid::s4u::ExecPtr child;
-
static void worker()
{
+ // Define an amount of work that should take 1 second to execute.
double computation_amount = simgrid::s4u::this_actor::get_host()->get_speed();
+ std::vector<simgrid::s4u::ExecPtr> pending_execs;
+ // Create a small DAG
+ // + Two parents and a child
+ // + First parent ends after 1 second and the Second parent after 2 seconds.
simgrid::s4u::ExecPtr first_parent = simgrid::s4u::this_actor::exec_init(computation_amount);
+ pending_execs.push_back(first_parent);
simgrid::s4u::ExecPtr second_parent = simgrid::s4u::this_actor::exec_init(2 * computation_amount);
+ pending_execs.push_back(second_parent);
+ simgrid::s4u::ExecPtr child = simgrid::s4u::this_actor::exec_init(computation_amount);
+ pending_execs.push_back(child);
- child = simgrid::s4u::this_actor::exec_init(computation_amount);
+ // Name the activities (for logging purposes only)
+ first_parent->set_name("parent 1");
+ second_parent->set_name("parent 2");
+ child->set_name("child");
+ // Create the dependencies by declaring 'child' as a successor of first_parent and second_parent
first_parent->add_successor(child.get());
second_parent->add_successor(child.get());
- second_parent->start();
- first_parent->wait();
- second_parent->wait();
-}
-static void vetoed_worker()
-{
+ // Start the activities.
+ first_parent->start();
+ second_parent->start();
+ // child uses a vetoable start to force it to wait for the completion of its predecessors
child->vetoable_start();
- while (not child->test()) {
- if (child->get_state() == simgrid::s4u::Exec::State::STARTING)
- XBT_INFO("child cannot start yet");
- else
- XBT_INFO("child is now in state %d", (int)child->get_state());
- simgrid::s4u::this_actor::sleep_for(0.25);
+
+ // wait for the completion of all activities
+ while (not pending_execs.empty()) {
+ int changed_pos = simgrid::s4u::Exec::wait_any_for(&pending_execs, -1);
+ XBT_INFO("Exec '%s' is complete", pending_execs[changed_pos]->get_cname());
+ pending_execs.erase(pending_execs.begin() + changed_pos);
}
- XBT_INFO("Should be okay now, child is in state %d", (int)child->get_state());
}
int main(int argc, char* argv[])
e.load_platform(argv[1]);
simgrid::s4u::Actor::create("worker", simgrid::s4u::Host::by_name("Fafard"), worker);
- simgrid::s4u::Actor::create("vetoed_worker", simgrid::s4u::Host::by_name("Fafard"), vetoed_worker);
e.run();
