[Qemu-devel] [PATCH v5 1/4] sockets: introduce set_socket_error()

[Amos Kong <akong@redhat.com>]

Introduce set_socket_error() to set the errno, use
WSASetLastError() for win32.
Sometimes, clean work would rewrite errno in error path,
we can use this function to restore real errno.

Signed-off-by: Amos Kong <akong@redhat.com>
---
 qemu_socket.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/qemu_socket.h b/qemu_socket.h
index fe4cf6c..a4c5170 100644
--- a/qemu_socket.h
+++ b/qemu_socket.h
@@ -8,6 +8,7 @@
 #include <ws2tcpip.h>
 
 #define socket_error() WSAGetLastError()
+#define set_socket_error(e) WSASetLastError(e)
 #undef EINTR
 #define EWOULDBLOCK WSAEWOULDBLOCK
 #define EINTR       WSAEINTR
@@ -26,6 +27,7 @@ int inet_aton(const char *cp, struct in_addr *ia);
 #include <sys/un.h>
 
 #define socket_error() errno
+#define set_socket_error(e) errno = e
 #define closesocket(s) close(s)
 
 #endif /* !_WIN32 */