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futex.2: Rework the description of FUTEX_LOCK_PI2 

Note the use of FUTEX_CLOCK_REALTIME for selecting the clock,
and eliminate repetition of details already covered in the
description of FUTEX_LOCK_PI.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2021-08-09 02:07:26 +02:00
parent eeeee81162
commit 69bc3836cc
1 changed files with 14 additions and 14 deletions
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28
man2/futex.2
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@ -1130,22 +1130,22 @@ arguments are ignored.
.TP .TP
.BR FUTEX_LOCK_PI2 " (since Linux 5.14)" .BR FUTEX_LOCK_PI2 " (since Linux 5.14)"
.\" commit bf22a6976897977b0a3f1aeba6823c959fc4fdae .\" commit bf22a6976897977b0a3f1aeba6823c959fc4fdae
This operation works similar to This operation is the same as
.BR FUTEX_LOCK_PI . .BR FUTEX_LOCK_PI ,
The only difference is the except that the clock against which
.I timeout .I timeout
argument. is measured is selectable.
.B FUTEX_LOCK_PI2 By default, the (absolute) timeout specified in
has support for selectable clocks.
.IP
If
.I timeout .I timeout
is not NULL, the structure it points to specifies is measured againt the
an absolute timeout. .B CLOCK_MONOTONIC
If clock, but if the
.I timeout .B FUTEX_CLOCK_REALTIME
is NULL, the operation can block indefinitely. flag is specified in
.IP .IR futex_op ,
then the timeout is measured against the
.B CLOCK_REALTIME
clock.
.\" .\"
.\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" .\""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.\" .\"