1 files changed, 45 insertions, 0 deletions
diff --git a/src/port/win32gai_strerror.c b/src/port/win32gai_strerror.c
new file mode 100644
index 0000000..5b47d17
--- /dev/null
+++ b/src/port/win32gai_strerror.c
@@ -0,0 +1,45 @@
+/*-------------------------------------------------------------------------
+ *
+ * win32gai_strerror.c
+ *	  Thread-safe gai_strerror() for Windows.
+ *
+ * Portions Copyright (c) 2024, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *    src/port/win32gai_strerror.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include <sys/socket.h>
+
+/*
+ * Windows has gai_strerrorA(), but it is not thread-safe so we avoid it.
+ *
+ * https://learn.microsoft.com/en-us/windows/win32/api/ws2tcpip/nf-ws2tcpip-gai_strerrora
+ */
+const char *
+gai_strerror(int errcode)
+{
+	switch (errcode)
+	{
+		case EAI_AGAIN:
+			return "Temporary failure in name resolution";
+		case EAI_BADFLAGS:
+			return "Bad value for ai_flags";
+		case EAI_FAIL:
+			return "Non-recoverable failure in name resolution";
+		case EAI_FAMILY:
+			return "ai_family not supported";
+		case EAI_MEMORY:
+			return "Memory allocation failure";
+		case EAI_NONAME:
+			return "Name or service not known";
+		case EAI_SERVICE:
+			return "Servname not supported for ai_socktype";
+		case EAI_SOCKTYPE:
+			return "ai_socktype not supported";
+		default:
+			return "Unknown server error";
+	}
+}