1 /* Copyright (c) 2012-2019. 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 #ifndef SIMGRID_KERNEL_ACTIVITY_MUTEX_HPP
7 #define SIMGRID_KERNEL_ACTIVITY_MUTEX_HPP
9 #include "simgrid/s4u/ConditionVariable.hpp"
10 #include "src/kernel/actor/ActorImpl.hpp"
11 #include <boost/intrusive/list.hpp>
17 class XBT_PUBLIC MutexImpl {
18 std::atomic_int_fast32_t refcount_{1};
23 MutexImpl() : piface_(this) {}
24 MutexImpl(MutexImpl const&) = delete;
25 MutexImpl& operator=(MutexImpl const&) = delete;
27 void lock(actor::ActorImpl* issuer);
28 bool try_lock(actor::ActorImpl* issuer);
29 void unlock(actor::ActorImpl* issuer);
30 bool is_locked() { return locked_; }
35 actor::ActorImpl* owner_ = nullptr;
36 // List of sleeping actors:
37 actor::SynchroList sleeping_;
39 // boost::intrusive_ptr<Mutex> support:
40 friend void intrusive_ptr_add_ref(MutexImpl* mutex)
42 XBT_ATTRIB_UNUSED auto previous = mutex->refcount_.fetch_add(1);
43 xbt_assert(previous != 0);
46 friend void intrusive_ptr_release(MutexImpl* mutex)
48 if (mutex->refcount_.fetch_sub(1) == 1)
52 s4u::Mutex& mutex() { return piface_; }
54 } // namespace activity
56 } // namespace simgrid