Date: Thu, 2 Mar 2017 12:20:23 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r314553 - in head/sys: kern sys Message-ID: <201703021220.v22CKNCS072749@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hselasky Date: Thu Mar 2 12:20:23 2017 New Revision: 314553 URL: https://svnweb.freebsd.org/changeset/base/314553 Log: Implement taskqueue_poll_is_busy() for use by the LinuxKPI. Refer to comment above function for a detailed description. Discussed with: kib @ MFC after: 1 week Sponsored by: Mellanox Technologies Modified: head/sys/kern/subr_taskqueue.c head/sys/sys/taskqueue.h Modified: head/sys/kern/subr_taskqueue.c ============================================================================== --- head/sys/kern/subr_taskqueue.c Thu Mar 2 10:44:57 2017 (r314552) +++ head/sys/kern/subr_taskqueue.c Thu Mar 2 12:20:23 2017 (r314553) @@ -487,6 +487,23 @@ task_is_running(struct taskqueue *queue, return (0); } +/* + * Only use this function in single threaded contexts. It returns + * non-zero if the given task is either pending or running. Else the + * task is idle and can be queued again or freed. + */ +int +taskqueue_poll_is_busy(struct taskqueue *queue, struct task *task) +{ + int retval; + + TQ_LOCK(queue); + retval = task->ta_pending > 0 || task_is_running(queue, task); + TQ_UNLOCK(queue); + + return (retval); +} + static int taskqueue_cancel_locked(struct taskqueue *queue, struct task *task, u_int *pendp) Modified: head/sys/sys/taskqueue.h ============================================================================== --- head/sys/sys/taskqueue.h Thu Mar 2 10:44:57 2017 (r314552) +++ head/sys/sys/taskqueue.h Thu Mar 2 12:20:23 2017 (r314553) @@ -79,6 +79,7 @@ int taskqueue_start_threads_cpuset(struc int taskqueue_enqueue(struct taskqueue *queue, struct task *task); int taskqueue_enqueue_timeout(struct taskqueue *queue, struct timeout_task *timeout_task, int ticks); +int taskqueue_poll_is_busy(struct taskqueue *queue, struct task *task); int taskqueue_cancel(struct taskqueue *queue, struct task *task, u_int *pendp); int taskqueue_cancel_timeout(struct taskqueue *queue,
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201703021220.v22CKNCS072749>