+VALUE rb_host_speed(VALUE Class, VALUE host);
+void rb_host_set_data(VALUE Class, VALUE host, VALUE data);
+VALUE rb_host_get_data(VALUE Class, VALUE host);
+VALUE rb_host_is_avail(VALUE Class, VALUE host);
+VALUE rb_host_process(VALUE Class, VALUE process);
+VALUE rb_host_get_all_hosts(VALUE Class);
+
+/* Functions related to tasks */
+
+typedef struct ruby_data {
+ void *ruby_task; // Pointer to send the ruby_task
+ void *user_data; // Pointer on the user data
+} s_ruby_data_t, *rb_data_t;
+
+void rb_task_free(m_task_t tk);
+VALUE rb_task_new(VALUE Class, VALUE name, VALUE comp_size,
+ VALUE comm_size);
+VALUE rb_task_comp(VALUE Class, VALUE task); // Get Computation Size
+VALUE rb_task_name(VALUE Class, VALUE task);
+VALUE rb_task_execute(VALUE Class, VALUE task);
+void rb_task_send(VALUE Class, VALUE task, VALUE mailbox);
+VALUE rb_task_receive(VALUE Class, VALUE mailbox); // Receive : return a task
+void rb_task_receive2(VALUE Class, VALUE task, VALUE mailbox); // Receive Task 2 << Not Appreciated
+VALUE rb_task_sender(VALUE Class, VALUE task);
+VALUE rb_task_source(VALUE Class, VALUE task);
+VALUE rb_task_listen(VALUE Class, VALUE task, VALUE alias); //Listen From Alias (=mailbox)
+VALUE rb_task_listen_host(VALUE Class, VALUE task, VALUE alias, VALUE host); //Listen from Host
+void rb_task_set_priority(VALUE Class, VALUE task, VALUE priority); // Set Priority
+void rb_task_cancel(VALUE Class, VALUE task); // Cancel
+VALUE rb_task_has_data(VALUE Class, VALUE task); // check if the task contains a data
+VALUE rb_task_get_data(VALUE Class, VALUE task); // get data
+void rb_task_set_data(VALUE Class, VALUE task, VALUE data); // set data
+
+/* Upcalls for the application handler */
+void rb_application_handler_on_start_document(void);
+void rb_application_handler_on_end_document(void);
+void rb_application_handler_on_begin_process(void);
+void rb_application_handler_on_process_arg(void);
+void rb_application_handler_on_property(void);
+void rb_application_handler_on_end_process(void);
+
+#endif /* RB_SG_BINDINGS */