[PATCH v3 46/54] tests/qtest: libqtest: Correct the timeout unit of blocking receive calls for win32

[Bin Meng <bmeng.cn@gmail.com>]

From: Bin Meng <bin.meng@windriver.com>

Some qtest cases don't get response from the QEMU executable under
test in time on Windows. It turns out that the socket receive call
got timeout before it receive the complete response.

The timeout value is supposed to be set to 50 seconds via the
setsockopt() call, but there is a difference among platforms.
The timeout unit of blocking receive calls is measured in
seconds on non-Windows platforms but milliseconds on Windows.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---

(no changes since v1)

 tests/qtest/libqtest.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c
index 1ae58624d9..e3360338de 100644
--- a/tests/qtest/libqtest.c
+++ b/tests/qtest/libqtest.c
@@ -36,13 +36,14 @@
 #include "qapi/qmp/qstring.h"
 
 #define MAX_IRQ 256
-#define SOCKET_TIMEOUT 50
 
 #ifndef _WIN32
+# define SOCKET_TIMEOUT 50
 # define CMD_EXEC   "exec "
 # define DEV_STDERR "/dev/fd/2"
 # define DEV_NULL   "/dev/null"
 #else
+# define SOCKET_TIMEOUT 50000
 # define CMD_EXEC   ""
 # define DEV_STDERR "2"
 # define DEV_NULL   "nul"
@@ -106,8 +107,16 @@ static int socket_accept(int sock)
     struct sockaddr_un addr;
     socklen_t addrlen;
     int ret;
+    /*
+     * timeout unit of blocking receive calls is different among platfoms.
+     * It's in seconds on non-Windows platforms but milliseconds on Windows.
+     */
+#ifndef _WIN32
     struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
                                .tv_usec = 0 };
+#else
+    DWORD timeout = SOCKET_TIMEOUT;
+#endif
 
     if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
                    (void *)&timeout, sizeof(timeout))) {
-- 
2.34.1