-XBT_PUBLIC(void) SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, size_t));
-XBT_PUBLIC(void) SIMIX_comm_copy_pointer_callback(smx_action_t comm, size_t buff_size);
-XBT_PUBLIC(void) SIMIX_comm_copy_buffer_callback(smx_action_t comm, size_t buff_size);
+XBT_PUBLIC(void) SIMIX_comm_set_copy_data_callback(void (*callback) (smx_action_t, void*, size_t));
+XBT_PUBLIC(void) SIMIX_comm_copy_pointer_callback(smx_action_t comm, void* buff, size_t buff_size);
+XBT_PUBLIC(void) SIMIX_comm_copy_buffer_callback(smx_action_t comm, void* buff, size_t buff_size);
+XBT_PUBLIC(void) smpi_comm_copy_data_callback(smx_action_t comm, void* buff, size_t buff_size);
+