Skip to content

Set Windows timeouts to enforce non-blocking read #38

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
larsch wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Set Windows timeouts to enforce non-blocking read #38

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
11 changes: 6 additions & 5 deletions src/lib.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -803,17 +803,18 @@ mod sys {
#[cfg(windows)]
mod sys {

use winapi::um::winnt::MAXDWORD;

use super::os_prelude::*;
use super::StdIoResult;
/// Overrides timeout value set by serialport-rs so that the read end will
/// never wake up with 0-byte payload.
pub(crate) fn override_comm_timeouts(handle: RawHandle) -> StdIoResult<()> {
let mut timeouts = COMMTIMEOUTS {
// wait at most 1ms between two bytes (0 means no timeout)
ReadIntervalTimeout: 1,
// disable "total" timeout to wait at least 1 byte forever
ReadTotalTimeoutMultiplier: 0,
ReadTotalTimeoutConstant: 0,
// Enable POSIX-like behaviour to wait for ANY about of bytes or timeout
ReadIntervalTimeout: MAXDWORD,
ReadTotalTimeoutMultiplier: MAXDWORD,
ReadTotalTimeoutConstant: 1,
// write timeouts are just copied from serialport-rs
WriteTotalTimeoutMultiplier: 0,
WriteTotalTimeoutConstant: 0,
Expand Down