X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=send.h;h=3aebb1600ebfdee0450c0100ae8c99921c7c0cd0;hp=2c6c7274344a6aaa03c1cf7c844639ca87c4d0ab;hb=89cde2c587229f04d779e3a387c4a801261d87f0;hpb=2ed89c59f0efcd0a2763f47c7d3455663241e623

diff --git a/send.h b/send.h
index 2c6c7274..3aebb160 100644
--- a/send.h
+++ b/send.h
@@ -84,3 +84,26 @@ struct sender {
  */
 	int (*client_cmds[NUM_SENDER_CMDS])(struct sender_command_data*);
 };
+
+/**
+ * check a file descriptor for writability
+ *
+ * \param fd the file desctiptor
+ *
+ * \return positive if fd is ready for writing, zero if it isn't, negative if
+ * an error occured.
+ */
+
+static inline int write_ok(int fd)
+{
+	struct timeval tv = {0, 0};
+	fd_set wfds;
+	int ret;
+again:
+	FD_ZERO(&wfds);
+	FD_SET(fd, &wfds);
+	ret = select(fd + 1, NULL, &wfds, NULL, &tv);
+	if (ret < 0 && errno == EINTR)
+		goto again;
+	return ret;
+}