2dc2ac1e6b
int/uint aren't considered FFI safe, replace them with the actual type they represent (i64/u64 or i32/u32). This is a breaking change, but at most a cast to `uint` or `int` needs to be added. [breaking-change]
44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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extern crate libc;
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mod rustrt {
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extern crate libc;
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#[link(name = "rust_test_helpers")]
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extern {
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pub fn rust_dbg_call(cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t,
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data: libc::uintptr_t)
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-> libc::uintptr_t;
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}
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}
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extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
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if data == 1 {
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data
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} else {
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count(data - 1) + 1
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}
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}
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fn count(n: libc::uintptr_t) -> libc::uintptr_t {
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unsafe {
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println!("n = {}", n);
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rustrt::rust_dbg_call(cb, n)
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}
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}
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pub fn main() {
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let result = count(1000);
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println!("result = {}", result);
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assert_eq!(result, 1000);
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}
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