SerialPort: avoid occasional hangs in .read() on Windows

aslze · Sep 24, 2024 · a621c86 · a621c86
1 parent 0b2f37c
commit a621c86
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/SerialPort.cpp b/src/SerialPort.cpp
@@ -157,7 +157,7 @@ int SerialPort::read(void *p, int n)
 	DWORD bytes;
 	OVERLAPPED overlapped;
 	memset(&overlapped, 0, sizeof(OVERLAPPED));
-	if (!ReadFile(_handle, p, n, NULL, &overlapped))
+	if (!ReadFile(_handle, p, n, NULL, &overlapped) && GetLastError() != ERROR_IO_PENDING)
 		return 0;
 	GetOverlappedResult(_handle, &overlapped, &bytes, TRUE);
 	return bytes;