我对获取在Rust程序中创建的线程的PID感兴趣。如documentation中所述,thread::id()
不适用于此目的。我发现Get the current thread id and process id as integers?似乎是答案,但我的实验表明它不起作用。
这是代码:
extern crate rand;
extern crate libc;
use std::thread::{self, Builder};
use std::process::{self, Command};
use rand::thread_rng;
use rand::RngCore;
use std::time::Duration;
use std::os::unix::thread::JoinHandleExt;
use libc::pthread_t;
fn main() {
let main_pid = process::id();
println!("This PID {}", main_pid);
let b = Builder::new().name(String::from("LongRunningThread")).spawn(move || {
let mut rng = thread_rng();
let spawned_pid = process::id();
println!("Spawned PID {}", spawned_pid);
loop {
let u = rng.next_u64() % 1000;
println!("Processing request {}", u);
thread::sleep(Duration::from_millis(u));
}
}).expect("Could not spawn worker thread");
let p_threadid : pthread_t = b.as_pthread_t();
println!("Spawned p_threadid {}", p_threadid);
let thread_id = b.thread().id();
println!("Spawned thread_id {:?}", thread_id);
thread::sleep(Duration::from_millis(60_000));
}
在Linux机器内部运行程序的输出如下:
This PID 8597
Spawned p_threadid 139858455706368. <-- Clearly wrong
Spawned thread_id ThreadId(1) <-- Clearly wrong
Spawned PID 8597
Processing request 289
Processing request 476
Processing request 361
Processing request 567
以下是我系统中htop输出的摘录:
6164 1026 root 20 0 98M 7512 6512 S 0.0 0.0 0:00.03 │ ├─ sshd: dash [priv]
6195 6164 dash 20 0 98M 4176 3176 S 0.0 0.0 0:00.20 │ │ └─ sshd: dash@pts/11
6196 6195 dash 20 0 22964 5648 3408 S 0.0 0.0 0:00.09 │ │ └─ -bash
8597 6196 dash 20 0 2544 4 0 S 0.0 0.0 0:00.00 │ │ └─ ./process_priorities
8598 6196 dash 20 0 2544 4 0 S 0.0 0.0 0:00.00 │ │ └─ LongRunningThre
我想要的派生线程的PID是8598,但是我不知道如何在Rust程序中获得它。有什么想法吗?
答案 0 :(得分:0)
我使用一个名为Palaver的现有板条箱找到了答案。它包含一个gettid()
,可跨平台使用。唯一需要注意的是,板条箱的默认配置使用夜间功能,因此,如果您处于稳定状态,请确保像这样palaver = { version = "*", default-features = false }
现在,当我运行使用gettid()
的代码时,这是输出:
This PID 9009
Priority changed for thread
Spawned PID 9010
Processing request 803
Processing request 279
Processing request 624
还有我的htop的输出:
6164 1026 root 20 0 98M 7512 6512 S 0.0 0.0 0:00.03 │ ├─ sshd: dash [priv]
6195 6164 dash 20 0 98M 4176 3176 S 0.0 0.0 0:00.21 │ │ └─ sshd: dash@pts/11
6196 6195 dash 20 0 22964 5648 3408 S 0.0 0.0 0:00.10 │ │ └─ -bash
9009 6196 dash 20 0 2544 4 0 S 0.0 0.0 0:00.00 │ │ └─ ./process_priorities
9010 6196 dash 20 0 2544 4 0 S 0.0 0.0 0:00.00 │ │ └─ LongRunningThre