From: Martin Ling <redacted>
Date: Tue, 8 Dec 2015 20:08:49 +0000 (+0000)
Subject: windows: Handle ERROR_IO_PENDING from ReadFile in sp_nonblocking_read().
X-Git-Tag: libserialport-0.1.1~9
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=ae2c5825e79ab5b38a8ca53941df6d73679a52e6;p=libserialport.git

windows: Handle ERROR_IO_PENDING from ReadFile in sp_nonblocking_read().

This fixes bug #707.
---

diff --git a/serialport.c b/serialport.c
index 2f7618e..520d27e 100644
--- a/serialport.c
+++ b/serialport.c
@@ -1234,10 +1234,11 @@ SP_API enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf,
 
 	/* Do read. */
 	if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
-		RETURN_FAIL("ReadFile() failed");
+		if (GetLastError() != ERROR_IO_PENDING)
+			RETURN_FAIL("ReadFile() failed");
 
 	/* Get number of bytes read. */
-	if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
+	if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, FALSE) == 0)
 		RETURN_FAIL("GetOverlappedResult() failed");
 
 	TRY(restart_wait_if_needed(port, bytes_read));