小编Ale*_*ons的帖子

我将数据从Rust传递给C.虽然传递原语似乎很容易,但我有点迷失结构.

我有以下Rust代码:

use ::std::os::raw::*;

static NAME: &[c_char] = &[65, 66, 67, 0];

#[repr(C)]
pub struct MyStruct {
    pub x: c_int,
    pub y: *const c_char,
}

#[no_mangle]
pub extern "C" fn get_my_struct() -> *const MyStruct {
    let my_struct = MyStruct {
        x: 11 as c_int,
        y: NAME.as_ptr(),
    };

    unsafe {
        ::std::mem::transmute(Box::new(my_struct))
    }
}

以下C代码:

typedef struct _my_struct my_struct;
extern const my_struct get_my_struct(void);

struct _my_struct {
    int x;
    const char *y;
};

int main(void) {
  my_struct my_complex_struct = get_my_struct();

  return 0;
} …