1 /* Copyright (c) 2006-2023. 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 #include <simgrid/cond.h>
7 #include <simgrid/s4u/ConditionVariable.hpp>
10 #include "src/kernel/activity/ActivityImpl.hpp"
11 #include "src/kernel/activity/ConditionVariableImpl.hpp"
12 #include "src/kernel/actor/SimcallObserver.hpp"
16 namespace simgrid::s4u {
18 ConditionVariablePtr ConditionVariable::create()
20 kernel::activity::ConditionVariableImpl* cond =
21 kernel::actor::simcall_answered([] { return new kernel::activity::ConditionVariableImpl(); });
22 return ConditionVariablePtr(cond->get_iface(), false);
28 void ConditionVariable::wait(MutexPtr lock)
30 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
31 kernel::actor::ConditionWaitSimcall observer{issuer, pimpl_, lock->pimpl_};
32 kernel::actor::simcall_blocking(
33 [&observer] { observer.get_cond()->wait(observer.get_mutex(), -1.0, observer.get_issuer()); }, &observer);
36 void ConditionVariable::wait(const std::unique_lock<Mutex>& lock)
38 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
39 kernel::actor::ConditionWaitSimcall observer{issuer, pimpl_, lock.mutex()->pimpl_};
40 kernel::actor::simcall_blocking(
41 [&observer] { observer.get_cond()->wait(observer.get_mutex(), -1.0, observer.get_issuer()); }, &observer);
44 std::cv_status s4u::ConditionVariable::wait_for(const std::unique_lock<Mutex>& lock, double timeout)
46 // The simcall uses -1 for "any timeout" but we don't want this:
50 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
51 kernel::actor::ConditionWaitSimcall observer{issuer, pimpl_, lock.mutex()->pimpl_, timeout};
52 bool timed_out = kernel::actor::simcall_blocking(
53 [&observer] { observer.get_cond()->wait(observer.get_mutex(), observer.get_timeout(), observer.get_issuer()); },
56 // If we reached the timeout, we have to take the lock again:
58 return std::cv_status::timeout;
60 return std::cv_status::no_timeout;
64 std::cv_status ConditionVariable::wait_until(const std::unique_lock<Mutex>& lock, double timeout_time)
66 double now = Engine::get_clock();
68 if (timeout_time < now)
71 timeout = timeout_time - now;
72 return this->wait_for(lock, timeout);
78 void ConditionVariable::notify_one()
80 simgrid::kernel::actor::simcall_answered([this]() { pimpl_->signal(); });
83 void ConditionVariable::notify_all()
85 simgrid::kernel::actor::simcall_answered([this]() { pimpl_->broadcast(); });
88 void intrusive_ptr_add_ref(const ConditionVariable* cond)
90 intrusive_ptr_add_ref(cond->pimpl_);
93 void intrusive_ptr_release(const ConditionVariable* cond)
95 intrusive_ptr_release(cond->pimpl_);
98 } // namespace simgrid::s4u
100 /* **************************** Public C interface *************************** */
101 sg_cond_t sg_cond_init()
103 return simgrid::s4u::ConditionVariable::create().detach();
106 void sg_cond_wait(sg_cond_t cond, sg_mutex_t mutex)
111 int sg_cond_wait_for(sg_cond_t cond, sg_mutex_t mutex, double delay)
113 std::unique_lock lock(*mutex);
114 return cond->wait_for(lock, delay) == std::cv_status::timeout;
117 void sg_cond_notify_one(sg_cond_t cond)
122 void sg_cond_notify_all(sg_cond_t cond)
127 void sg_cond_destroy(const_sg_cond_t cond)
129 intrusive_ptr_release(cond);