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Improve message usage in proc-macro

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Reuse storage for the buffer send to child process of proc-macro.
This commit is contained in:
Edwin Cheng 2021-03-24 03:47:08 +08:00
parent f41ae64722
commit 79f583ed66
3 changed files with 17 additions and 9 deletions
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7
crates/proc_macro_api/src/process.rs
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@ -90,8 +90,10 @@ impl ProcMacroProcessSrv {
fn client_loop(task_rx: Receiver<Task>, mut process: Process) {
let (mut stdin, mut stdout) = process.stdio().expect("couldn't access child stdio");
let mut buf = String::new();
for Task { req, result_tx } in task_rx {
match send_request(&mut stdin, &mut stdout, req) {
match send_request(&mut stdin, &mut stdout, req, &mut buf) {
Ok(res) => result_tx.send(res).unwrap(),
Err(err) => {
log::error!(
@ -152,7 +154,8 @@ fn send_request(
mut writer: &mut impl Write,
mut reader: &mut impl BufRead,
req: Request,
buf: &mut String,
) -> io::Result<Option<Response>> {
req.write(&mut writer)?;
Response::read(&mut reader)
Response::read(&mut reader, buf)
}