-/* Copyright (c) 2019. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2019-2022. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#ifndef SIMGRID_KERNEL_ACTIVITY_SEMAPHOREIMPL_HPP_
-#define SIMGRID_KERNEL_ACTIVITY_SEMAPHOREIMPL_HPP_
+#ifndef SIMGRID_KERNEL_ACTIVITY_SEMAPHOREIMPL_HPP
+#define SIMGRID_KERNEL_ACTIVITY_SEMAPHOREIMPL_HPP
#include <atomic>
#include <boost/intrusive/list.hpp>
namespace activity {
class XBT_PUBLIC SemaphoreImpl {
+ std::atomic_int_fast32_t refcount_{1};
+ s4u::Semaphore piface_;
+ unsigned int value_;
+ actor::SynchroList sleeping_; /* list of sleeping actors*/
+
public:
- explicit SemaphoreImpl(unsigned int value) : value_(value){};
- ~SemaphoreImpl() = default;
+ explicit SemaphoreImpl(unsigned int value) : piface_(this), value_(value){};
SemaphoreImpl(SemaphoreImpl const&) = delete;
SemaphoreImpl& operator=(SemaphoreImpl const&) = delete;
- void acquire(smx_actor_t issuer, double timeout);
+ void acquire(actor::ActorImpl* issuer, double timeout);
void release();
- bool would_block() { return (value_ == 0); }
- unsigned int get_capacity() { return value_; }
+ bool would_block() const { return (value_ == 0); }
+ void remove_sleeping_actor(actor::ActorImpl& actor) { xbt::intrusive_erase(sleeping_, actor); }
+
+ unsigned int get_capacity() const { return value_; }
+ bool is_used() const { return not sleeping_.empty(); }
+
+ SemaphoreImpl* ref();
+ void unref();
friend void intrusive_ptr_add_ref(SemaphoreImpl* sem)
{
}
friend void intrusive_ptr_release(SemaphoreImpl* sem)
{
- if (sem->refcount_.fetch_sub(1) == 1)
+ if (sem->refcount_.fetch_sub(1) == 1) {
+ xbt_assert(not sem->is_used(), "Cannot destroy semaphore since someone is still using it");
delete sem;
+ }
}
- unsigned int value_;
- actor::SynchroList sleeping_; /* list of sleeping actors*/
-
-private:
- std::atomic_int_fast32_t refcount_{1};
+ s4u::Semaphore& sem() { return piface_; }
};
} // namespace activity
} // namespace kernel
} // namespace simgrid
-#endif /* SIMGRID_KERNEL_ACTIVITY_SEMAPHOREIMPL_HPP_ */
+#endif /* SIMGRID_KERNEL_ACTIVITY_SEMAPHOREIMPL_HPP */