Rust Code:
#[no_mangle] use std::thread; pub extern fn process() { let handles: Vec<_> = (0..10).map(|_| { thread::spawn(|| { let mut _x = 0; for _ in (0..5_000_001) { _x += 1 } }) }).collect(); for h in handles { h.join().ok().expect("Could not join a thread!"); } }
Cargo.toml:
[package] name = "embed" version = "0.1.0" authors = ["hustlibraco "] [lib] name = "embed" crate-type = ["dylib"]
编译得到target/release/libembed.so
共享库,然后我在此目录下面新建了一个python文件:
from ctypes import cdll lib = cdll.LoadLibrary("target/release/libembed.so") lib.process() print("done!")
执行报错:
-bash-4.2# python invoke.py Traceback (most recent call last): File "invoke.py", line 5, in lib.process() File "/usr/lib64/python2.7/ctypes/__init__.py", line 373, in __getattr__ func = self.__getitem__(name) File "/usr/lib64/python2.7/ctypes/__init__.py", line 378, in __getitem__ func = self._FuncPtr((name_or_ordinal, self)) AttributeError: target/release/libembed.so: undefined symbol: process
这是Rust官方教程给的例子,为什么我这里会执行出错呢?
#[no_mangle]应该写在函数前面,而不是use前...
楼主你是怎么编译的,我编译出来的结果没有libembed.so,好捉急_(:з」∠)_