make sure we don't chew too much CPU when the outgoing fd is full

diff --git a/io.c b/io.c
index b469d8b..2f4162c 100644 (file)
--- a/io.c
+++ b/io.c
@@ -372,6 +372,7 @@ static void writefd_unbuffered(int fd,char *buf,int len)
 
                        if (ret == -1 && 
                            (errno == EWOULDBLOCK || errno == EAGAIN)) {
+                               msleep(1);
                                continue;
                        }
 
@@ -463,6 +464,17 @@ void io_end_buffering(int fd)
        }
 }
 
+/* some OSes have a bug where an exit causes the pending writes on
+   a socket to be flushed. Do an explicit shutdown to try to prevent this */
+void io_shutdown(void)
+{
+       if (multiplex_out_fd != -1) close(multiplex_out_fd);
+       if (io_error_fd != -1) close(io_error_fd);
+       multiplex_out_fd = -1;
+       io_error_fd = -1;
+}
+
+
 static void writefd(int fd,char *buf,int len)
 {
        stats.total_written += len;