--- /dev/null
+/* Copyright (c) 2012-2018. 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_CONDITIONVARIABLEIMPL_HPP
+#define SIMGRID_KERNEL_ACTIVITY_CONDITIONVARIABLEIMPL_HPP
+
+#include "simgrid/s4u/ConditionVariable.hpp"
+#include "src/simix/ActorImpl.hpp"
+#include <boost/intrusive/list.hpp>
+
+struct s_smx_cond_t {
+ s_smx_cond_t() : cond_(this) {}
+
+ std::atomic_int_fast32_t refcount_{1};
+ smx_mutex_t mutex = nullptr;
+ simgrid::kernel::actor::SynchroList sleeping; /* list of sleeping processes */
+ simgrid::s4u::ConditionVariable cond_;
+};
+
+XBT_PRIVATE smx_cond_t SIMIX_cond_init();
+XBT_PRIVATE void SIMIX_cond_broadcast(smx_cond_t cond);
+XBT_PRIVATE void SIMIX_cond_signal(smx_cond_t cond);
+XBT_PRIVATE void intrusive_ptr_add_ref(s_smx_cond_t* cond);
+XBT_PRIVATE void intrusive_ptr_release(s_smx_cond_t* cond);
+
+#endif