[BACK]Return to condvar.9 CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / share / man / man9

Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.

Diff for /src/share/man/man9/condvar.9 between version 1.19 and 1.19.4.2

version 1.19, 2017/11/13 09:09:28 version 1.19.4.2, 2020/04/08 14:07:22
Line 27 
Line 27 
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE  .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.  .\" POSSIBILITY OF SUCH DAMAGE.
 .\"  .\"
 .Dd November 12, 2017  .Dd December 12, 2019
 .Dt CONDVAR 9  .Dt CONDVAR 9
 .Os  .Os
 .Sh NAME  .Sh NAME
Line 144  as available until the calling LWP has b
Line 144  as available until the calling LWP has b
 .Pp  .Pp
 Non-interruptable waits have the potential to deadlock the system, and so must  Non-interruptable waits have the potential to deadlock the system, and so must
 be kept short (typically, under one second).  be kept short (typically, under one second).
   .Pp
   Upon being awakened, the calling LWP should verify the availability
   of the resource (or other condition).
   It should not blindly assume that the resource is now available.
   If the resource is still not available, the calling LWP may call
   .Fn cv_wait
   again to continue waiting.
 .It Fn cv_wait_sig "cv" "mtx"  .It Fn cv_wait_sig "cv" "mtx"
 .Pp  .Pp
 As per  As per
Line 263  be called while holding the interlocking
Line 270  be called while holding the interlocking
 .Fn cv_wait .  .Fn cv_wait .
 .El  .El
 .Sh EXAMPLES  .Sh EXAMPLES
 .Bd -literal  
 Consuming a resource:  Consuming a resource:
   .Bd -literal
         /*          /*
          * Lock the resource.  Its mutex will also serve as the           * Lock the resource.  Its mutex will also serve as the
          * interlock.           * interlock.
Line 298  Consuming a resource:
Line 304  Consuming a resource:
         res->state = BUSY;          res->state = BUSY;
         mutex_exit(&res->mutex);          mutex_exit(&res->mutex);
         consume(res);          consume(res);
   .Ed
   .Pp
 Releasing a resource for the next consumer to use:  Releasing a resource for the next consumer to use:
   .Bd -literal
         mutex_enter(&res->mutex);          mutex_enter(&res->mutex);
         res->state = IDLE;          res->state = IDLE;
         cv_signal(&res->condvar);          cv_signal(&res->condvar);
Legend:
Removed from v.1.19  
changed lines
  Added in v.1.19.4.2
CVSweb <webmaster@jp.NetBSD.org>