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/forward.h"
7 #include "simgrid/mutex.h"
8 #include "simgrid/s4u/Mutex.hpp"
9 #include "src/kernel/activity/MutexImpl.hpp"
10 #include "src/mc/checker/SimcallObserver.hpp"
17 if (pimpl_ != nullptr)
21 /** @brief Blocks the calling actor until the mutex can be obtained */
24 simcall_mutex_lock(pimpl_);
27 /** @brief Release the ownership of the mutex, unleashing a blocked actor (if any)
29 * Will fail if the calling actor does not own the mutex.
33 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
34 mc::MutexUnlockSimcall observer{issuer};
35 kernel::actor::simcall([this, issuer] { this->pimpl_->unlock(issuer); }, &observer);
38 /** @brief Acquire the mutex if it's free, and return false (without blocking) if not */
39 bool Mutex::try_lock()
41 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
42 mc::MutexTrylockSimcall observer{issuer, pimpl_};
43 return kernel::actor::simcall([&observer] { return observer.get_mutex()->try_lock(observer.get_issuer()); },
47 /** @brief Create a new mutex
51 MutexPtr Mutex::create()
53 auto* mutex = new kernel::activity::MutexImpl();
54 return MutexPtr(&mutex->mutex(), false);
57 /* refcounting of the intrusive_ptr is delegated to the implementation object */
58 void intrusive_ptr_add_ref(const Mutex* mutex)
64 void intrusive_ptr_release(const Mutex* mutex)
68 mutex->pimpl_->unref();
72 } // namespace simgrid
74 /* **************************** Public C interface *************************** */
75 sg_mutex_t sg_mutex_init()
77 simgrid::kernel::activity::MutexImpl* mutex =
78 simgrid::kernel::actor::simcall([] { return new simgrid::kernel::activity::MutexImpl(); });
80 return new simgrid::s4u::Mutex(mutex);
83 void sg_mutex_lock(sg_mutex_t mutex)
88 void sg_mutex_unlock(sg_mutex_t mutex)
93 int sg_mutex_try_lock(sg_mutex_t mutex)
95 return mutex->try_lock();
98 void sg_mutex_destroy(const_sg_mutex_t mutex)