| History log of /src/share/man/man9/condvar.9 |
| Revision | | Date | Author | Comments |
| 1.31 |
| 07-Sep-2023 |
ad | Permit calling cv_signal()/cv_broadcast() after mutex release.
|
| 1.30 |
| 27-Aug-2020 |
fcambus | Fix a bunch of typos in various kernel man pages.
|
| 1.29 |
| 19-Aug-2020 |
msaitoh | s/ be be / be /
|
| 1.28 |
| 11-May-2020 |
riastradh | Remove timedwaitclock.
This did not fix the bug I hoped it would fix in futex, and needs
more design thought. Might redo it somewhat differently later.
|
| 1.27 |
| 03-May-2020 |
riastradh | Bump date.
|
| 1.26 |
| 03-May-2020 |
riastradh | Document cv_timedwaitclock.
|
| 1.25 |
| 03-May-2020 |
riastradh | Add a note about setting the timeout to zero _and_ returning success.
|
| 1.24 |
| 03-May-2020 |
riastradh | Simplify example of cv_timedwaitbt.
It is simpler if there is only one place we check the condition.
That said, there are cases where the caller needs to re-check before
choosing to fail (e.g., futex_wait in kern/sys_futex.c, which must
verify the condition before taking destructive steps to abort the
wait). But it's not clear that that's the norm.
|
| 1.23 |
| 03-May-2020 |
riastradh | Update cv_timedwaitbt documentation to reflect useful reality.
Previously, a negative timeout was forbidden (kassert), a zero or
maybe even just a sufficiently small timeout would block forever, and
we would subtract the time elapsed -- possibly longer than the
timeout, leading to a negative updated timeout, which would trip the
kassert the next time around if used as advertised. DERP.
Now negative timeouts are still forbidden in order to detect usage
mistakes, but a zero timeout fails immediately and we clamp the
subtracted time to be at least zero so you can always safely call
cv_timedwaitbt in a loop.
(An alternative would be to fail immediately for all nonpositive
timeouts, and to leave in the timespec the negative time we overshot,
but it's not clear this would be useful.)
|
| 1.22 |
| 10-Apr-2020 |
ad | - Make this needed sequence always work for condvars, by not touching the CV
again after wakeup. Previously it could panic because cv_signal() could
be called by cv_wait_sig() + others:
cv_broadcast(cv);
cv_destroy(cv);
- In support of the above, if an LWP doing a timed wait is awoken by
cv_broadcast() or cv_signal(), don't return an error if the timer
fires after the fact, i.e. either succeed or fail, not both.
- Remove LOCKDEBUG code for CVs which never worked properly and is of
questionable use.
|
| 1.21 |
| 12-Dec-2019 |
pgoyette | Point out that spurious wake-ups are possible, and that an LWP should
check for resource availability after being awoken.
|
| 1.20 |
| 12-Apr-2019 |
abhinav | Split the examples into two separate literal sections
ok wiz@
|
| 1.19 |
| 13-Nov-2017 |
wiz | branches: 1.19.4;
Bump date for previous.
|
| 1.18 |
| 12-Nov-2017 |
riastradh | Replace xref mb(9) by xref membar_ops(3).
|
| 1.17 |
| 12-Nov-2017 |
riastradh | Rework cv_timedwaitbt documentation and example code.
|
| 1.16 |
| 03-Jul-2017 |
wiz | Remove workaround for ancient HTML generation code.
|
| 1.15 |
| 03-Jul-2017 |
pgoyette | Update to include new cv_timedwaitbt() and cv_timedwaitbt_sig().
Also update code example.
OK riastradh@
|
| 1.14 |
| 02-Dec-2010 |
wiz | Remove boilerplate in CODE REFERENCES on file paths.
Describe in intro(9) how to read paths in the CODE REFERENCES section.
|
| 1.13 |
| 06-Aug-2008 |
skrll | Spellos
|
| 1.12 |
| 04-Jun-2008 |
ad | Note that DIAGNOSTIC/LOCKDEBUG applies.
|
| 1.11 |
| 30-Apr-2008 |
martin | branches: 1.11.2;
Convert TNF licenses to new 2 clause variant
|
| 1.10 |
| 26-Jan-2008 |
wiz | branches: 1.10.4; 1.10.6;
Document that cv_timedwait with a ticks argument of zero behaves like
cv_wait.
|
| 1.9 |
| 29-Mar-2007 |
ad | branches: 1.9.4;
- Note that cv_has_waiters() can only be used to assert that there are
waiters sleeping non-interruptably (i.e., in cv_wait()). Prompted by
a discussion with pooka@.
- Minor cosmetic changes.
|
| 1.8 |
| 05-Feb-2007 |
ad | Sync with latest changes.
|
| 1.7 |
| 03-Feb-2007 |
ad | Document cv_has_waiters().
|
| 1.6 |
| 03-Feb-2007 |
ad | - Require that cv_signal/cv_broadcast be called with the interlock held.
- Provide 'async' versions that don't need the interlock.
|
| 1.5 |
| 02-Feb-2007 |
wiz | Sort SEE ALSO. Fix typo.
|
| 1.4 |
| 02-Feb-2007 |
ad | Add manpage for memory barrier ops. Not enabled in the Makefile yet.
|
| 1.3 |
| 04-Dec-2006 |
wiz | Use more markup. Use HTML escapes. Use .Rs/.Re for book citation.
|
| 1.2 |
| 13-Nov-2006 |
ad | Fix errors.
|
| 1.1 |
| 13-Nov-2006 |
ad | Add manual pages for RW locks, mutexes and condition variables. Not
enabled in the Makefile.
|
| 1.9.4.1 |
| 23-Mar-2008 |
matt | sync with HEAD
|
| 1.10.6.2 |
| 17-Jun-2008 |
yamt | sync with head.
|
| 1.10.6.1 |
| 18-May-2008 |
yamt | sync with head.
|
| 1.10.4.3 |
| 05-Oct-2008 |
mjf | Sync with HEAD.
|
| 1.10.4.2 |
| 29-Jun-2008 |
mjf | Sync with HEAD.
|
| 1.10.4.1 |
| 02-Jun-2008 |
mjf | Sync with HEAD.
|
| 1.11.2.2 |
| 18-Sep-2008 |
wrstuden | Sync with wrstuden-revivesa-base-2.
|
| 1.11.2.1 |
| 23-Jun-2008 |
wrstuden | Sync w/ -current. 34 merge conflicts to follow.
|
| 1.19.4.3 |
| 13-Apr-2020 |
martin | Mostly merge changes from HEAD upto 20200411
|
| 1.19.4.2 |
| 08-Apr-2020 |
martin | Merge changes from current as of 20200406
|
| 1.19.4.1 |
| 10-Jun-2019 |
christos | Sync with HEAD
|
