[CRIU] [RFC PATCH 03/12] util: epoll_run: allow interrupting event polling
Mike Rapoport
rppt at linux.vnet.ibm.com
Mon Jan 9 00:23:17 PST 2017
If an event handler returns a positive value, the event polling and
handling loop is interrupted after all the pending events indicated by
epoll_wait are processed.
Signed-off-by: Mike Rapoport <rppt at linux.vnet.ibm.com>
---
criu/util.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/criu/util.c b/criu/util.c
index 4349b34..fa1d749 100644
--- a/criu/util.c
+++ b/criu/util.c
@@ -1214,6 +1214,7 @@ int epoll_add_rfd(int epfd, struct epoll_rfd *rfd)
int epoll_run_rfds(int epollfd, struct epoll_event *evs, int nr_fds, int timeout)
{
int ret, i, nr_events;
+ bool have_a_break = false;
while (1) {
/* FIXME -- timeout should decrease over time... */
@@ -1234,7 +1235,12 @@ int epoll_run_rfds(int epollfd, struct epoll_event *evs, int nr_fds, int timeout
ret = rfd->revent(rfd);
if (ret < 0)
goto out;
+ if (ret > 0)
+ have_a_break = true;
}
+
+ if (have_a_break)
+ return 1;
}
out:
return ret;
--
1.9.1
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