rust/compiler/rustc_codegen_cranelift/example/raw-dylib.rs

32 lines
1.1 KiB
Rust

// Tests the raw-dylib feature for Windows.
// https://doc.rust-lang.org/reference/items/external-blocks.html#the-link-attribute
fn main() {
#[cfg(windows)]
{
#[link(name = "kernel32", kind = "raw-dylib")]
extern "C" {
fn GetModuleFileNameA(
module: *mut std::ffi::c_void,
filename: *mut u8,
size: u32,
) -> u32;
}
// Get the filename of the current executable....
let mut buffer = [0u8; 1024];
let size = unsafe {
GetModuleFileNameA(core::ptr::null_mut(), buffer.as_mut_ptr(), buffer.len() as u32)
};
if size == 0 {
eprintln!("failed to get module file name: {}", std::io::Error::last_os_error());
return;
} else {
// ...and make sure that it matches the test name.
let filename =
std::ffi::CStr::from_bytes_with_nul(&buffer[..size as usize + 1]).unwrap();
assert!(filename.to_str().unwrap().ends_with("raw-dylib.exe"));
}
}
}