1 files changed, 66 insertions, 0 deletions
diff --git a/libpq/noblock.c b/libpq/noblock.c
new file mode 100644
index 0000000..959d3ad
--- /dev/null
+++ b/libpq/noblock.c
@@ -0,0 +1,66 @@
+/*-------------------------------------------------------------------------
+ *
+ * noblock.c
+ *	  set a file descriptor as blocking or non-blocking
+ *
+ * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * IDENTIFICATION
+ *	  src/port/noblock.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "c.h"
+
+#include <fcntl.h>
+
+
+/*
+ * Put socket into nonblock mode.
+ * Returns true on success, false on failure.
+ */
+bool
+pg_set_noblock(pgsocket sock)
+{
+#if !defined(WIN32)
+	int			flags;
+
+	flags = fcntl(sock, F_GETFL);
+	if (flags < 0)
+		return false;
+	if (fcntl(sock, F_SETFL, (flags | O_NONBLOCK)) == -1)
+		return false;
+	return true;
+#else
+	unsigned long ioctlsocket_ret = 1;
+
+	/* Returns non-0 on failure, while fcntl() returns -1 on failure */
+	return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
+#endif
+}
+
+/*
+ * Put socket into blocking mode.
+ * Returns true on success, false on failure.
+ */
+bool
+pg_set_block(pgsocket sock)
+{
+#if !defined(WIN32)
+	int			flags;
+
+	flags = fcntl(sock, F_GETFL);
+	if (flags < 0)
+		return false;
+	if (fcntl(sock, F_SETFL, (flags & ~O_NONBLOCK)) == -1)
+		return false;
+	return true;
+#else
+	unsigned long ioctlsocket_ret = 0;
+
+	/* Returns non-0 on failure, while fcntl() returns -1 on failure */
+	return (ioctlsocket(sock, FIONBIO, &ioctlsocket_ret) == 0);
+#endif
+}