Libpq non-blocking mode, from Alfred Perlstein

src/interfaces/libpq/libpq-int.h

@@ -11,7 +11,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: libpq-int.h,v 1.16 2000/01/15 05:37:21 ishii Exp $
+ * $Id: libpq-int.h,v 1.17 2000/01/18 06:09:24 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -214,6 +214,9 @@ struct pg_conn
 	int			inEnd;			/* offset to first position after avail
 								 * data */
 
+	int			nonblocking;	/* whether this connection is using a blocking
+								 * socket to the backend or not */
+
 	/* Buffer for data not yet sent to backend */
 	char	   *outBuffer;		/* currently allocated buffer */
 	int			outBufSize;		/* allocated size of buffer */
@@ -300,4 +303,10 @@ extern char *sys_errlist[];
 #endif	 /* sunos4 */
 #endif	 /* !strerror */
 
+/* 
+ * this is so that we can check is a connection is non-blocking internally
+ * without the overhead of a function call
+ */
+#define pqIsnonblocking(conn)	(conn->nonblocking)
+
 #endif	 /* LIBPQ_INT_H */