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377 lines
9.6 KiB
XML
377 lines
9.6 KiB
XML
<refentry id="glib-genmarshal" lang="en">
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<refmeta>
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<refentrytitle>glib-genmarshal</refentrytitle>
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<manvolnum>1</manvolnum>
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<refmiscinfo class="manual">User Commands</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>glib-genmarshal</refname>
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<refpurpose>C code marshaller generation utility for GLib closures</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>glib-genmarshal</command>
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<arg choice="opt" rep="repeat">options</arg>
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<arg choice="opt" rep="repeat">files</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1><title>Description</title>
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<para><command>glib-genmarshal</command> is a small utility that generates C code
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marshallers for callback functions of the GClosure mechanism in the GObject
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sublibrary of GLib. The marshaller functions have a standard signature,
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they get passed in the invoking closure, an array of value structures holding
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the callback function parameters and a value structure for the return value
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of the callback. The marshaller is then responsible to call the respective C
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code function of the closure with all the parameters on the stack and to
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collect its return value.
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</para>
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</refsect1>
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<refsect1><title>Invocation</title>
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<para><command>glib-genmarshal</command> takes a list of marshallers to generate as
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input. The marshaller list is either read from standard input or from files
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passed as additional arguments on the command line.
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</para>
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<refsect2><title>Options</title>
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<variablelist>
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<varlistentry>
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<term><option>--header</option></term>
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<listitem><para>
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Generate header file contents of the marshallers.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--body</option></term>
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<listitem><para>
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Generate C code file contents of the marshallers.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--prefix=string</option>, <option>--prefix string</option></term>
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<listitem><para>
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Specify marshaller prefix. The default prefix is <literal>`g_cclosure_marshal'</literal>.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--skip-source</option></term>
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<listitem><para>
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Skip source location remarks in generated comments.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--nostdinc</option></term>
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<listitem><para>
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Do not use the standard marshallers of the GObject library, and skip
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<filename>gmarshal.h</filename> include directive in generated header files.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--internal</option></term>
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<listitem><para>
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Mark generated functions as internal, using G_GNUC_INTERNAL.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--valist-marshallers</option></term>
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<listitem><para>
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Generate valist marshallers, for use with g_signal_set_va_marshaller().
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-v</option>, <option>--version</option></term>
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<listitem><para>
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Print version information.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--g-fatal-warnings</option></term>
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<listitem><para>
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Make warnings fatal, that is, exit immediately once a warning occurs.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-h</option>, <option>--help</option></term>
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<listitem><para>
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Print brief help and exit.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-v</option>, <option>--version</option></term>
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<listitem><para>
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Print version and exit.
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</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect2>
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<refsect2><title>Marshaller list format</title>
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<para>
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The marshaller lists are processed line by line, a line can contain a
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comment in the form of
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<programlisting>
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# this is a comment
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</programlisting>
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or a marshaller specification of the form
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<programlisting>
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<replaceable>RTYPE</replaceable>:<replaceable>PTYPE</replaceable>
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<replaceable>RTYPE</replaceable>:<replaceable>PTYPE</replaceable>,<replaceable>PTYPE</replaceable>
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<replaceable>RTYPE</replaceable>:<replaceable>PTYPE</replaceable>,<replaceable>PTYPE</replaceable>,<replaceable>PTYPE</replaceable>
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</programlisting>
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(up to 16 <replaceable>PTYPE</replaceable>s may be present).
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</para>
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<para>
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The <replaceable>RTYPE</replaceable> part specifies the callback's return
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type and the <replaceable>PTYPE</replaceable>s right to the colon specify
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the callback's parameter list, except for the first and the last arguments
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which are always pointers.
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</para>
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</refsect2>
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<refsect2><title>Parameter types</title>
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<para>
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Currently, the following types are supported:
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<variablelist>
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<varlistentry>
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<term><replaceable>VOID</replaceable></term>
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<listitem><para>
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indicates no return type, or no extra parameters.
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If <replaceable>VOID</replaceable> is used as the parameter list, no
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additional parameters may be present.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>BOOLEAN</replaceable></term>
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<listitem><para>
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for boolean types (gboolean)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>CHAR</replaceable></term>
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<listitem><para>
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for signed char types (gchar)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>UCHAR</replaceable></term>
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<listitem><para>
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for unsigned char types (guchar)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>INT</replaceable></term>
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<listitem><para>
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for signed integer types (gint)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>UINT</replaceable></term>
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<listitem><para>
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for unsigned integer types (guint)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>LONG</replaceable></term>
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<listitem><para>
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for signed long integer types (glong)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>ULONG</replaceable></term>
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<listitem><para>
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for unsigned long integer types (gulong)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>INT64</replaceable></term>
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<listitem><para>
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for signed 64bit integer types (gint64)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>UINT64</replaceable></term>
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<listitem><para>
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for unsigned 64bit integer types (guint64)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>ENUM</replaceable></term>
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<listitem><para>
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for enumeration types (gint)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>FLAGS</replaceable></term>
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<listitem><para>
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for flag enumeration types (guint)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>FLOAT</replaceable></term>
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<listitem><para>
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for single-precision float types (gfloat)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>DOUBLE</replaceable></term>
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<listitem><para>
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for double-precision float types (gdouble)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>STRING</replaceable></term>
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<listitem><para>
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for string types (gchar*)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>BOXED</replaceable></term>
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<listitem><para>
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for boxed (anonymous but reference counted) types (GBoxed*)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>PARAM</replaceable></term>
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<listitem><para>
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for GParamSpec or derived types (GParamSpec*)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>POINTER</replaceable></term>
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<listitem><para>
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for anonymous pointer types (gpointer)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>OBJECT</replaceable></term>
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<listitem><para>
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for GObject or derived types (GObject*)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>VARIANT</replaceable></term>
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<listitem><para>
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for GVariant types (GVariant*)
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>NONE</replaceable></term>
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<listitem><para>
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deprecated alias for <replaceable>VOID</replaceable>
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>BOOL</replaceable></term>
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<listitem><para>
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deprecated alias for <replaceable>BOOLEAN</replaceable>
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</para></listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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</refsect1>
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<refsect1><title>Example</title>
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<para>
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To generate marshallers for the following callback functions:
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</para>
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<programlisting>
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void foo (gpointer data1,
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gpointer data2);
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void bar (gpointer data1,
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gint param1,
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gpointer data2);
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gfloat baz (gpointer data1,
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gboolean param1,
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guchar param2,
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gpointer data2);
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</programlisting>
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<para>
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The marshaller list has to look like this:
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</para>
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<programlisting>
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VOID:VOID
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VOID:INT
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FLOAT:BOOLEAN,UCHAR
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</programlisting>
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<para>
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The generated marshallers have the arguments encoded in their function name.
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For this particular list, they are
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</para>
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<programlisting>
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g_cclosure_marshal_VOID__VOID(),
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g_cclosure_marshal_VOID__INT(),
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g_cclosure_marshal_FLOAT__BOOLEAN_UCHAR().
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</programlisting>
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<para>
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They can be used directly for GClosures or be passed in as the
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GSignalCMarshaller c_marshaller; argument upon creation of signals:
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</para>
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<programlisting>
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GClosure *cc_foo, *cc_bar, *cc_baz;
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cc_foo = g_cclosure_new (NULL, foo, NULL);
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g_closure_set_marshal (cc_foo, g_cclosure_marshal_VOID__VOID);
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cc_bar = g_cclosure_new (NULL, bar, NULL);
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g_closure_set_marshal (cc_bar, g_cclosure_marshal_VOID__INT);
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cc_baz = g_cclosure_new (NULL, baz, NULL);
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g_closure_set_marshal (cc_baz, g_cclosure_marshal_FLOAT__BOOLEAN_UCHAR);
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</programlisting>
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</refsect1>
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<refsect1><title>See also</title>
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<para>
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<command>glib-mkenums</command>(1)
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</para>
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</refsect1>
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<refsect1><title>Bugs</title>
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<para>
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None known yet.
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</para>
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</refsect1>
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<refsect1><title>Author</title>
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<para><command>glib-genmarshal</command> has been written by Tim Janik
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<email>timj@gtk.org</email>.
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</para>
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<para>
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This manual page was provided by Tim Janik <email>timj@gtk.org</email>.
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</para>
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</refsect1>
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</refentry>
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