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"
15 /** @brief Blocks the calling actor until the mutex can be obtained */
18 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
19 mc::MutexLockSimcall observer{issuer, pimpl_};
20 kernel::actor::simcall_blocking<void>([&observer] { observer.get_mutex()->lock(observer.get_issuer()); }, &observer);
23 /** @brief Release the ownership of the mutex, unleashing a blocked actor (if any)
25 * Will fail if the calling actor does not own the mutex.
29 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
30 mc::MutexUnlockSimcall observer{issuer};
31 kernel::actor::simcall([this, issuer] { this->pimpl_->unlock(issuer); }, &observer);
34 /** @brief Acquire the mutex if it's free, and return false (without blocking) if not */
35 bool Mutex::try_lock()
37 kernel::actor::ActorImpl* issuer = kernel::actor::ActorImpl::self();
38 mc::MutexLockSimcall observer{issuer, pimpl_, false};
39 return kernel::actor::simcall([&observer] { return observer.get_mutex()->try_lock(observer.get_issuer()); },
43 /** @brief Create a new mutex
47 MutexPtr Mutex::create()
49 auto* mutex = new kernel::activity::MutexImpl();
50 return MutexPtr(&mutex->mutex(), false);
53 /* refcounting of the intrusive_ptr is delegated to the implementation object */
54 void intrusive_ptr_add_ref(const Mutex* mutex)
59 void intrusive_ptr_release(const Mutex* mutex)
62 mutex->pimpl_->unref();
66 } // namespace simgrid
68 /* **************************** Public C interface *************************** */
69 sg_mutex_t sg_mutex_init()
71 return simgrid::s4u::Mutex::create().detach();
74 void sg_mutex_lock(sg_mutex_t mutex)
79 void sg_mutex_unlock(sg_mutex_t mutex)
84 int sg_mutex_try_lock(sg_mutex_t mutex)
86 return mutex->try_lock();
89 void sg_mutex_destroy(const_sg_mutex_t mutex)
91 intrusive_ptr_release(mutex);