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-rw-r--r--src/include/port/win32.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/include/port/win32.h b/src/include/port/win32.h
index fc2222be680..37f1dcc5855 100644
--- a/src/include/port/win32.h
+++ b/src/include/port/win32.h
@@ -259,11 +259,18 @@ typedef int pid_t;
/*
* Supplement to <errno.h>.
+ *
+ * We redefine network-related Berkeley error symbols as the corresponding WSA
+ * constants. This allows elog.c to recognize them as being in the Winsock
+ * error code range and pass them off to pgwin32_socket_strerror(), since
+ * Windows' version of plain strerror() won't cope. Note that this will break
+ * if these names are used for anything else besides Windows Sockets errors.
+ * See TranslateSocketError() when changing this list.
*/
#undef EAGAIN
+#define EAGAIN WSAEWOULDBLOCK
#undef EINTR
#define EINTR WSAEINTR
-#define EAGAIN WSAEWOULDBLOCK
#undef EMSGSIZE
#define EMSGSIZE WSAEMSGSIZE
#undef EAFNOSUPPORT