GLIB-GENMARSHAL(1)GLIB-GENMARSHAL(1)NAMEglib-genmarshal - C code marshaller generation utility for
GLib closures
SYNOPSISglib-genmarshal [options...] [files...]
DESCRIPTIONglib-genmarshal is a small utility that generates C code
marshallers for callback functions of the GClosure mecha-
nism in the GObject sublibrary of GLib. The marshaller
functions have a standard signature, they get passed in
the invoking closure, an array of value structures holding
the callback function parameters and a value structure for
the return value of the callback. The marshaller is then
responsible to call the respective C code function of the
closure with all the parameters on the stack and to col-
lect its return value.
INVOKATIONglib-genmarshal takes a list of marshallers to generate
as input. The marshaller list is either read from standard
input or from files passed as additional arguments on the
command line.
Options
--header
Generate header file contents of the marshallers.
--body Generate C code file contents of the marshallers.
--prefix=string, --prefix string
Specify marshaller prefix. The default prefix is
`g_cclosure_marshal'.
--skip-source
Skip source location remarks in generated comments.
--nostdinc
Do not use the standard marshallers of the GObject
library, and skip gmarshal.h include directive in
generated header files.
--g-fatal-warnings
Make warnings fatal, that is, exit immediately once
a warning occurs.
-h, --help
Print brief help and exit.
-v, --version
Print version and exit.
Marshaller list format
The marshaller lists are processed line by line, a line
can contain a comment in the form of
# this is a comment
or a marshaller specification of the form
RTYPE:PTYPE
RTYPE:PTYPE,PTYPE
RTYPE:PTYPE,PTYPE,PTYPE
(up to 16 PTYPEs may be present).
The RTYPE part specifies the callback's return type and
the PTYPEs right to the colon specify the callback's
parameter list, except for the first and the last argu-
ments which are always pointers.
Parameter types
Currently, the following types are supported:
VOID indicates no return type, or no extra parameters.
If VOID is used as the parameter list, no addi-
tional parameters may be present.
BOOLEAN
for boolean types (gboolean)
CHAR for signed char types (gchar)
UCHAR for unsigned char types (guchar)
INT for signed integer types (gint)
UINT for unsigned integer types (guint)
LONG for signed long integer types (glong)
ULONG for unsigned long integer types (gulong)
ENUM for enumeration types (gint)
FLAGS for flag enumeration types (guint)
FLOAT for single-precision float types (gfloat)
DOUBLE for double-precision float types (gdouble)
STRING for string types (gchar*)
BOXED for boxed (anonymous but reference counted) types
(GBoxed*)
PARAM for GParamSpec or derived types (GParamSpec*)
POINTER
for anonymous pointer types (gpointer)
OBJECT for GObject or derived types (GObject*)
NONE deprecated alias for VOID
BOOL deprecated alias for BOOLEAN
EXAMPLE
To generate marshallers for the following callback func-
tions:
void foo (gpointer data1,
gpointer data2);
void bar (gpointer data1,
gint param1,
gpointer data2);
gfloat baz (gpointer data1,
gboolean param1,
guchar param2,
gpointer data2);
The marshaller list has to look like this:
VOID:VOID
VOID:INT
FLOAT:BOOLEAN,UCHAR
The generated marshallers have the arguments encoded in
their function name. For this particular list, they are
g_cclosure_marshal_VOID__VOID(),
g_cclosure_marshal_VOID__INT(),
g_cclosure_marshal_FLOAT__BOOLEAN_UCHAR().
They can be used directly for GClosures or be passed in as
the GSignalCMarshaller c_marshaller; argument upon cre-
ation of signals:
GClosure *cc_foo, *cc_bar, *cc_baz;
cc_foo = g_cclosure_new (NULL, foo, NULL);
g_closure_set_marshal (cc_foo, g_cclosure_marshal_VOID__VOID);
cc_bar = g_cclosure_new (NULL, bar, NULL);
g_closure_set_marshal (cc_bar, g_cclosure_marshal_VOID__INT);
cc_baz = g_cclosure_new (NULL, baz, NULL);
g_closure_set_marshal (cc_baz, g_cclosure_marshal_FLOAT__BOOLEAN_UCHAR);
SEE ALSOglib-mkenums(1)BUGS
None known yet.
AUTHORglib-genmarshal has been written by Tim Janik
<timj@gtk.org>.
This manual page was provided by Tim Janik <timj@gtk.org>.
GLIB-GENMARSHAL(1)
