--- /dev/null
+/* Copyright (c) 2006-2015. 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_S4U_ASYNC_HPP
+#define SIMGRID_S4U_ASYNC_HPP
+
+namespace simgrid {
+namespace s4u {
+
+/* Forward declaration */
+class Comm;
+
+typedef enum {
+ inited, started, finished
+} e_s4u_async_state_t;
+
+/** @brief Asynchronous Actions
+ *
+ * This class is the ancestor of every asynchronous actions, that is, of actions that do take time in the simulated world.
+ */
+class Async {
+ friend Comm;
+protected:
+ Async();
+ virtual ~Async();
+
+private:
+ smx_synchro_t p_inferior = NULL;
+
+private:
+ e_s4u_async_state_t p_state = inited;
+public:
+ /** Starts a previously created async.
+ *
+ * This function is optional: you can call wait() even if you didn't call start()
+ */
+ virtual void start()=0;
+ /** Tests whether the given async is terminated yet */
+ //virtual bool test()=0;
+ /** Blocks until the async is terminated */
+ virtual void wait()=0;
+ /** Blocks until the async is terminated, or until the timeout is elapsed
+ * Raises: timeout exception.*/
+ virtual void wait(double timeout)=0;
+ /** Cancel that async */
+ //virtual void cancel();
+ /** Retrieve the current state of the async */
+ e_s4u_async_state_t getState() {return p_state;}
+
+private:
+ double p_remains = 0;
+public:
+ /** Get the remaining amount of work that this Async entails. When it's 0, it's done. */
+ double getRemains();
+ /** Set the [remaining] amount of work that this Async will entail
+ *
+ * It is forbidden to change the amount of work once the Async is started */
+ void setRemains(double remains);
+
+private:
+ void *p_userData = NULL;
+public:
+ /** Put some user data onto the Async */
+ void setUserData(void *data) {p_userData=data;}
+ /** Retrieve the user data of the Async */
+ void *getUserData() { return p_userData; }
+}; // class
+
+}}; // Namespace simgrid::s4u
+
+#endif /* SIMGRID_S4U_ASYNC_HPP */
