-XBT_PUBLIC(size_t) simcall_file_read(void* ptr, size_t size, smx_file_t fd);
-XBT_PUBLIC(size_t) simcall_file_write(const void* ptr, size_t size,
- smx_file_t fd);
+/***************************** File **********************************/
+XBT_PUBLIC(void *) simcall_file_get_data(smx_file_t fd);
+XBT_PUBLIC(void) simcall_file_set_data(smx_file_t fd, void *data);
+XBT_PUBLIC(size_t) simcall_file_read(size_t size, smx_file_t fd);
+XBT_PUBLIC(size_t) simcall_file_write(size_t size, smx_file_t fd);