replace select() with poll() (#270)

usage of select (3) in modern programs is typically discouraged.
this simply replaces the select call with poll (3) instead.

and since poll conveniently ignores negative fds, this also reduces
needs for some special casing.

this also handles error if they occur, while old implementation didn't.
other than the error handling, no change in functionality should occur.

1 files changed, 1 insertions, 0 deletions

diff --git a/nsxiv.h b/nsxiv.h
index 4350864..67c2185 100644
--- a/nsxiv.h
+++ b/nsxiv.h
@@ -44,6 +44,7 @@
 
 #define TV_DIFF(t1,t2) (((t1)->tv_sec  - (t2)->tv_sec ) * 1000 + \
                         ((t1)->tv_usec - (t2)->tv_usec) / 1000)
+#define TV_TO_MS(tv)   (((tv)->tv_sec * 1000) + ((tv)->tv_usec / 1000))
 
 #define TV_SET_MSEC(tv,t) {             \
   (tv)->tv_sec  = (t) / 1000;           \