uloop: Add flag to allow callback to be called on error conditions.

In some conditions, an application is interested in errors happening
on a file descriptor and might be able to resolve the issue in the
callback function.

This patch adds a flag to notify the uloop framework that errors
should be passed to the callback function, instead of silently
removing the fd from the polling set.

Signed-off-by: Karl Vogel <karl.vogel@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/uloop.h b/uloop.h
index 98dd818..7564514 100644
--- a/uloop.h
+++ b/uloop.h
@@ -53,6 +53,8 @@ typedef void (*uloop_process_handler)(struct uloop_process *c, int ret);
 #define ULOOP_EDGE_DEFER	(1 << 5)
 #endif
 
+#define ULOOP_ERROR_CB		(1 << 6)
+
 struct uloop_fd
 {
 	uloop_fd_handler cb;