Function _zend_mem_block_size 

pub unsafe extern "C" fn _zend_mem_block_size(
    ptr: *mut c_void,
    __zend_filename: *const c_char,
    __zend_lineno: u32,
    __zend_orig_filename: *const c_char,
    __zend_orig_lineno: u32,
) -> usize