1 /* Copyright (c) 2006-2021. 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/forward.h"
8 #include "simgrid/s4u/ConditionVariable.hpp"
9 #include "simgrid/simix.h"
10 #include "src/kernel/activity/ConditionVariableImpl.hpp"
11 #include "src/kernel/activity/MutexImpl.hpp"
12 #include "src/kernel/actor/SimcallObserver.hpp"
13 #include "xbt/log.hpp"
21 ConditionVariablePtr ConditionVariable::create()
23 kernel::activity::ConditionVariableImpl* cond =
24 kernel::actor::simcall([] { return new kernel::activity::ConditionVariableImpl(); });
25 return ConditionVariablePtr(cond->get_iface(), false);
31 void ConditionVariable::wait(MutexPtr lock)
33 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
34 kernel::actor::ConditionWaitSimcall observer{issuer, pimpl_, lock->pimpl_};
35 kernel::actor::simcall_blocking(
36 [&observer] { observer.get_cond()->wait(observer.get_mutex(), -1.0, observer.get_issuer()); }, &observer);
39 void ConditionVariable::wait(const std::unique_lock<Mutex>& lock)
41 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
42 kernel::actor::ConditionWaitSimcall observer{issuer, pimpl_, lock.mutex()->pimpl_};
43 kernel::actor::simcall_blocking(
44 [&observer] { observer.get_cond()->wait(observer.get_mutex(), -1.0, observer.get_issuer()); }, &observer);
47 std::cv_status s4u::ConditionVariable::wait_for(const std::unique_lock<Mutex>& lock, double timeout)
49 // The simcall uses -1 for "any timeout" but we don't want this:
53 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
54 kernel::actor::ConditionWaitSimcall observer{issuer, pimpl_, lock.mutex()->pimpl_, timeout};
55 bool timed_out = kernel::actor::simcall_blocking(
56 [&observer] { observer.get_cond()->wait(observer.get_mutex(), observer.get_timeout(), observer.get_issuer()); },
59 // If we reached the timeout, we have to take the lock again:
61 return std::cv_status::timeout;
63 return std::cv_status::no_timeout;
67 std::cv_status ConditionVariable::wait_until(const std::unique_lock<Mutex>& lock, double timeout_time)
69 double now = Engine::get_clock();
71 if (timeout_time < now)
74 timeout = timeout_time - now;
75 return this->wait_for(lock, timeout);
81 void ConditionVariable::notify_one()
83 simgrid::kernel::actor::simcall([this]() { pimpl_->signal(); });
86 void ConditionVariable::notify_all()
88 simgrid::kernel::actor::simcall([this]() { pimpl_->broadcast(); });
91 void intrusive_ptr_add_ref(const ConditionVariable* cond)
93 intrusive_ptr_add_ref(cond->pimpl_);
96 void intrusive_ptr_release(const ConditionVariable* cond)
98 intrusive_ptr_release(cond->pimpl_);
102 } // namespace simgrid
104 /* **************************** Public C interface *************************** */
105 sg_cond_t sg_cond_init()
107 return simgrid::s4u::ConditionVariable::create().detach();
110 void sg_cond_wait(sg_cond_t cond, sg_mutex_t mutex)
115 int sg_cond_wait_for(sg_cond_t cond, sg_mutex_t mutex, double delay)
117 std::unique_lock<simgrid::s4u::Mutex> lock(*mutex);
118 return cond->wait_for(lock, delay) == std::cv_status::timeout;
121 void sg_cond_notify_one(sg_cond_t cond)
126 void sg_cond_notify_all(sg_cond_t cond)
131 void sg_cond_destroy(const_sg_cond_t cond)
133 intrusive_ptr_release(cond);