-namespace simgrid {
-namespace simix {
-
-class XBT_PUBLIC() MutexImpl {
-public:
- MutexImpl();
- ~MutexImpl();
- MutexImpl(MutexImpl const&) = delete;
- MutexImpl& operator=(MutexImpl const&) = delete;
-
- void lock(smx_actor_t issuer);
- bool try_lock(smx_actor_t issuer);
- void unlock(smx_actor_t issuer);
-
- bool locked = false;
- smx_actor_t owner = nullptr;
- // List of sleeping processes:
- xbt_swag_t sleeping = nullptr;
-
- // boost::intrusive_ptr<Mutex> support:
- friend void intrusive_ptr_add_ref(MutexImpl* mutex)
- {
- // Atomic operation! Do not split in two instructions!
- XBT_ATTRIB_UNUSED auto previous = (mutex->refcount_)++;
- xbt_assert(previous != 0);
- }
- friend void intrusive_ptr_release(MutexImpl* mutex)
- {
- // Atomic operation! Do not split in two instructions!
- auto count = --(mutex->refcount_);
- if (count == 0)
- delete mutex;
- }
-
- simgrid::s4u::Mutex& mutex() { return mutex_; }
-
-private:
- std::atomic_int_fast32_t refcount_{1};
- simgrid::s4u::Mutex mutex_;
-};
-}
-}