<s>
OpenBinder	B-Operating_System
is	O
a	O
system	O
for	O
inter-process	B-Operating_System
communication	I-Operating_System
.	O
</s>
<s>
It	O
was	O
developed	O
at	O
Be	O
Inc	O
.	O
and	O
then	O
Palm	O
,	O
Inc	O
.	O
and	O
was	O
the	O
basis	O
for	O
the	O
Binder	O
framework	O
now	O
used	O
in	O
the	O
Android	B-Application
operating	I-Application
system	I-Application
developed	O
by	O
Google	B-Application
.	I-Application
</s>
<s>
OpenBinder	B-Operating_System
allows	O
processes	B-Operating_System
to	O
present	O
interfaces	B-Application
which	O
may	O
be	O
called	O
by	O
other	O
threads	B-Operating_System
.	O
</s>
<s>
Each	O
process	O
maintains	O
a	O
thread	B-Operating_System
pool	O
which	O
may	O
be	O
used	O
to	O
service	O
such	O
requests	O
.	O
</s>
<s>
OpenBinder	B-Operating_System
takes	O
care	O
of	O
reference	B-General_Concept
counting	I-General_Concept
,	O
recursion	O
back	O
into	O
the	O
original	O
thread	B-Operating_System
,	O
and	O
the	O
inter-process	B-Operating_System
communication	I-Operating_System
itself	O
.	O
</s>
<s>
On	O
the	O
Linux	B-Application
version	O
of	O
OpenBinder	B-Operating_System
,	O
the	O
communication	O
is	O
achieved	O
using	O
ioctls	B-Operating_System
on	O
a	O
given	O
file	B-Application
descriptor	I-Application
,	O
communicating	O
with	O
a	O
kernel	B-Application
driver	I-Application
.	O
</s>
<s>
The	O
kernel-side	O
component	O
of	O
the	O
Linux	B-Application
version	O
of	O
OpenBinder	B-Operating_System
was	O
merged	O
into	O
the	O
Linux	B-Application
kernel	B-Operating_System
mainline	O
in	O
kernel	B-Operating_System
version	O
3.19	O
,	O
which	O
was	O
released	O
on	O
February	O
8	O
,	O
2015	O
.	O
</s>
