Rickard,
On 11/04/2013 9:51 PM, Rickard Bäckman wrote:
Hi all,
can I please have reviews for this change.
In the current implementation do_suspend uses spin loops to wait until a thread
has been suspended. I would like to change that to use semaphores to reduce CPU
usage and also make it easier to have a deterministic timeout. Since we are
posting to the semaphore in the signal handler we can't use pthread_semaphore
since it isn't async safe, which is why all implementations uses low-level
os-specific semaphore constructs.
POSIX Semaphore sem_post() is async-signal safe:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04
David
-----
Bug: http://bugs.sun.com/view_bug.do?bug_id=8011882
Webrev: http://cr.openjdk.java.net/~rbackman/8011882/
Thanks
/R
