It's easier for people to debug, and side-steps the problem that errno
values differ between architectures.
Bug: http://b/17458391
Change-Id: I1db9b2cbb653839d3936b91e37e5cff02671318a
Sometimes it seems like we can get into a situation where we are
unable to remove an fd from the epoll set but it keeps sending us
events anyhow. Defensively rebuild the epoll set in this case
to prevent us from spinning forever.
Bug: 21271428
Change-Id: I5607e565f2e12460d7113a1f62a70d38d334e271
When a file descriptor is closed before removing it from the
epoll set, it will normally be removed automatically from the
epoll set by the kernel. However if there exists a duplicate
then the original file descriptor may remain in the set and
continue to receive events until all duplicates have been closed.
Unfortunately due to kernel limitations we need to rebuild the epoll
set from scratch because it may contain an old file handle that we are
now unable to remove since its file descriptor is no longer valid.
No such problem would have occurred if we were using the poll system
call instead, but that approach carries others disadvantages.
Bug: 19715279
Change-Id: If1ab8ebda0825755a416d513e888942a02ee3948
Added code to protect against situations that may occur when a
Looper callback has the side-effect of closing the file descriptor that
it is watching before it returns. This code pattern is very
convenient for implementation but it does expose issues in how
the list of callbacks is maintained. In particular, we
need to watch out for file descriptors which have been reused.
This change may resolve previously unexplained ANRs associated with
log messages such as: "Error modifying epoll events for fd 44, errno=2"
Bug: 10349083
Change-Id: I20eedf6ffbdeda382653ca0104962505194741b0
The loop isn't technically idle at this time, it's just checking
whether any file descriptors have pending events. However it's
still a good signal as to whether the loop is alive.
Bug: 19532373
Change-Id: I555c473e70ffd8a56e1b10aa60026eb674a16de9
