<?xml version='1.0' encoding="UTF-8"?> <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [ <chapter id="chapter-native-plugins"> <title>Writing
Native
Plugins
</title> Writing
Native
plugins
is
pretty
simple,
but
since
it's
C/C++
it's
a
bit
There
are
currently
no
C++
bindings
and
no
intention
to
write
them,
but
the
C
API
is
still
usable
from
C++.
<simplesect id="example"> <informalexample><programlisting> #include
<gplugin.h
> #include
<gplugin-native.h
> /*
This
function
is
called
by
the
native
plugin
loader
to
get
information
*
about
the
plugin.
It
returns
a
#GPluginPluginInfo
instance
that
*
describes
the
plugin.
If
anything
goes
wrong
during
this
function,
*
@error
should
be
set
via
g_set_error()
and
%NULL
should
be
returned.
*
It
must
match
the
signature
of
#GPluginNativePluginQueryFunc,
and
it
*
will
be
passed
to
#GPLUGIN_NATIVE_PLUGIN_DECLARE
which
will
export
it
static
GPluginPluginInfo
*
gplugin_native_basic_plugin_query(GError
**error)
{
/*
Authors
is
a
list
of
authors
who
worked
on
the
plugin.
Generally
*
these
are
in
the
"Name
Surname
<user@domain.com
>"
format.
const
gchar
*
const
authors[]
=
{
"Author
O
<author@example.com
>",
/*
gplugin_plugin_info_new
only
requires
that
the
id
be
set,
and
the
*
rest
are
here
for
demonstration
purposes.
return
gplugin_plugin_info_new(
"gplugin/native-basic-plugin",
GPLUGIN_NATIVE_PLUGIN_ABI_VERSION,
"description",
"description",
/*
This
function
is
called
by
the
native
plugin
loader
when
the
plugin
*
should
be
loaded.
It
should
do
any
setup
that
the
plugin
requires
and
*
return
%TRUE
if
everything
was
successfull.
If
not,
it
should
set
*
@error
with
g_set_error()
and
return
%FALSE.
This
function
needs
to
*
match
the
signature
of
#GPluginNativePluginLoadFunc,
and
it
will
be
*
passed
to
#GPLUGIN_NATIVE_PLUGIN_DECLARE
which
will
export
it
gplugin_native_basic_plugin_load(GPluginPlugin
*plugin,
GError
**error)
{
/*
This
function
is
called
by
the
native
plugin
loader
when
the
plugin
*
should
be
unloaded.
It
should
do
any
clean
up
that
the
plugin
requires
*
and
return
%TRUE
if
everything
was
successfull.
If
not,
it
should
set
*
@error
with
g_set_error()
and
return
%FALSE.
This
function
needs
to
*
match
the
signature
of
#GPluginNativePluginUnloadFunc,
and
it
will
be
*
passed
to
#GPLUGIN_NATIVE_PLUGIN_DECLARE
which
will
export
it
gplugin_native_basic_plugin_unload(GPluginPlugin
*plugin,
GError
*error)
{
/*
This
macro
does
the
heavy
lifting
of
making
sure
to
export
all
of
the
*
symbols
correctly
as
well
as
add
some
future
proofing
for
features
*
like
statically
plugins.
It
is
highly
recommended
to
use
this
macro
*
instead
of
manually
exporting
the
symbols
yourself.
GPLUGIN_NATIVE_PLUGIN_DECLARE(gplugin_native_basic_plugin)
</programlisting></informalexample>
