<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
an	O
event	O
(	O
also	O
called	O
event	O
semaphore	O
)	O
is	O
a	O
type	O
of	O
synchronization	O
mechanism	O
that	O
is	O
used	O
to	O
indicate	O
to	O
waiting	O
processes	O
when	O
a	O
particular	O
condition	O
has	O
become	O
true	O
.	O
</s>
<s>
Different	O
implementations	O
of	O
events	O
may	O
provide	O
different	O
subsets	O
of	O
these	O
possible	O
operations	O
;	O
for	O
example	O
,	O
the	O
implementation	O
provided	O
by	O
Microsoft	B-Application
Windows	I-Application
provides	O
the	O
operations	O
wait	O
(	O
WaitForObject	O
and	O
related	O
functions	O
)	O
,	O
set	O
(	O
SetEvent	O
)	O
,	O
and	O
clear	O
(	O
ResetEvent	O
)	O
.	O
</s>
<s>
Events	O
short	O
of	O
reset	O
function	O
,	O
that	O
is	O
,	O
those	O
which	O
can	B-Device
be	I-Device
completed	I-Device
only	I-Device
once	I-Device
,	O
are	O
known	O
as	O
futures	O
.	O
</s>
<s>
Monitors	O
are	O
,	O
on	O
the	O
other	O
hand	O
,	O
more	O
general	O
since	O
they	O
combine	O
completion	O
signaling	O
with	O
mutex	B-Operating_System
and	O
do	O
not	O
let	O
the	O
producer	O
and	O
consumer	O
to	O
execute	O
simultaneously	O
in	O
the	O
monitor	O
making	O
it	O
an	O
event+critical	O
section	O
.	O
</s>
