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Update HISTORY.

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Reviewed by:	dmr
This commit is contained in:
Greg Lehey 2007-02-27 05:39:22 +00:00
parent b6c86f4b1e
commit fc5fe41fe9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=167053
1 changed files with 14 additions and 11 deletions
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25
share/man/man9/sleep.9
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@ -212,15 +212,24 @@ See above.
.Xr malloc 9 ,
.Xr mi_switch 9
.Sh HISTORY
The sleep/wakeup thread synchronization mechanism is very old.
It
appeared in a very early version of
.Ux .
The functions
.Fn sleep
and
.Fn wakeup
was present in
.At v1 .
They were probably also present in the preceding
PDP-7 version of UNIX.
They were the basic process synchronization model.
.Pp
The
.Fn tsleep
function appeared in
.Bx 4.4 .
.Bx 4.4
and added the parameters
.Fa wmesg
and
.Fa timo .
The
.Fn wakeup_one
function appeared in
@ -238,12 +247,6 @@ function appeared in
function appeared in
.Fx 7.0 .
.Pp
The
.Fn sleep
function used to be the traditional form.
It did not let you specify a timeout or a
.Fa wmesg ,
hence it was discontinued.
.Sh AUTHORS
.An -nosplit
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