Function esp_idf_svc::sys::funopen

source ยท 
pub unsafe extern "C" fn funopen(
    __cookie: *const c_void,
    __readfn: Option<unsafe extern "C" fn(_: *mut c_void, _: *mut i8, _: i32) -> i32>,
    __writefn: Option<unsafe extern "C" fn(_: *mut c_void, _: *const i8, _: i32) -> i32>,
    __seekfn: Option<unsafe extern "C" fn(_: *mut c_void, _: i32, _: i32) -> i32>,
    __closefn: Option<unsafe extern "C" fn(_: *mut c_void) -> i32>,
) -> *mut __sFILE