static void
prepare_invocation_info (GPerlI11nInvocationInfo *iinfo,
GICallableInfo *info)
{
gint orig_n_args;
guint i;
dwarn ("invoke: %s\n"
" n_args: %d\n",
g_base_info_get_name (info),
g_callable_info_get_n_args (info));
iinfo->interface = info;
iinfo->is_function = GI_IS_FUNCTION_INFO (info);
iinfo->is_vfunc = GI_IS_VFUNC_INFO (info);
iinfo->is_callback = (g_base_info_get_type (info) == GI_INFO_TYPE_CALLBACK);
iinfo->is_signal = GI_IS_SIGNAL_INFO (info);
dwarn (" is_function = %d, is_vfunc = %d, is_callback = %d\n",
iinfo->is_function, iinfo->is_vfunc, iinfo->is_callback);
orig_n_args = g_callable_info_get_n_args (info);
g_assert (orig_n_args >= 0);
iinfo->n_args = (guint) orig_n_args;
if (iinfo->n_args) {
iinfo->arg_infos = gperl_alloc_temp (sizeof (GITypeInfo*) * iinfo->n_args);
iinfo->arg_types = gperl_alloc_temp (sizeof (GITypeInfo*) * iinfo->n_args);
iinfo->aux_args = gperl_alloc_temp (sizeof (GIArgument) * iinfo->n_args);
} else {
iinfo->arg_infos = NULL;
iinfo->arg_types = NULL;
iinfo->aux_args = NULL;
}
for (i = 0 ; i < iinfo->n_args ; i++) {
iinfo->arg_infos[i] = g_callable_info_get_arg (info, (gint) i);
iinfo->arg_types[i] = g_arg_info_get_type (iinfo->arg_infos[i]);
}
iinfo->return_type_info = g_callable_info_get_return_type (info);
iinfo->has_return_value =
GI_TYPE_TAG_VOID != g_type_info_get_tag (iinfo->return_type_info);
iinfo->return_type_ffi = g_type_info_get_ffi_type (iinfo->return_type_info);
iinfo->return_type_transfer = g_callable_info_get_caller_owns (info);
iinfo->callback_infos = NULL;
iinfo->array_infos = NULL;
iinfo->free_after_call = NULL;
}
/**
* g_callable_info_get_ffi_return_type:
* @callable_info: a callable info from a typelib
*
* Fetches the ffi_type for a corresponding return value of
* a #GICallableInfo
* Return value: the ffi_type for the return value
*/
static ffi_type *
g_callable_info_get_ffi_return_type (GICallableInfo *callable_info)
{
GITypeInfo *return_type;
ffi_type *return_ffi_type;
g_return_val_if_fail (callable_info != NULL, NULL);
return_type = g_callable_info_get_return_type (callable_info);
return_ffi_type = g_type_info_get_ffi_type (return_type);
g_base_info_unref((GIBaseInfo*)return_type);
return return_ffi_type;
}
/**
* g_function_info_prep_invoker:
* @info: A #GIFunctionInfo
* @invoker: Output invoker structure
* @error: A #GError
*
* Initialize the caller-allocated @invoker structure with a cache
* of information needed to invoke the C function corresponding to
* @info with the platform's default ABI.
*
* A primary intent of this function is that a dynamic structure allocated
* by a language binding could contain a #GIFunctionInvoker structure
* inside the binding's function mapping.
*
* Returns: %TRUE on success, %FALSE otherwise with @error set.
*/
gboolean
g_function_info_prep_invoker (GIFunctionInfo *info,
GIFunctionInvoker *invoker,
GError **error)
{
const char *symbol;
ffi_type *rtype;
ffi_type **atypes;
GITypeInfo *tinfo;
GIArgInfo *ainfo;
gboolean is_method;
gboolean throws;
gint n_args, n_invoke_args, i;
g_return_val_if_fail (info != NULL, FALSE);
g_return_val_if_fail (invoker != NULL, FALSE);
symbol = g_function_info_get_symbol ((GIFunctionInfo*) info);
if (!g_typelib_symbol (g_base_info_get_typelib((GIBaseInfo *) info),
symbol, &(invoker->native_address)))
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_SYMBOL_NOT_FOUND,
"Could not locate %s: %s", symbol, g_module_error ());
return FALSE;
}
is_method = (g_function_info_get_flags (info) & GI_FUNCTION_IS_METHOD) != 0
&& (g_function_info_get_flags (info) & GI_FUNCTION_IS_CONSTRUCTOR) == 0;
throws = g_function_info_get_flags (info) & GI_FUNCTION_THROWS;
tinfo = g_callable_info_get_return_type ((GICallableInfo *)info);
rtype = g_type_info_get_ffi_type (tinfo);
g_base_info_unref ((GIBaseInfo *)tinfo);
n_args = g_callable_info_get_n_args ((GICallableInfo *)info);
if (is_method)
n_invoke_args = n_args+1;
else
n_invoke_args = n_args;
if (throws)
/* Add an argument for the GError */
n_invoke_args ++;
/* TODO: avoid malloc here? */
atypes = g_malloc0 (sizeof (ffi_type*) * n_invoke_args);
if (is_method)
{
atypes[0] = &ffi_type_pointer;
}
for (i = 0; i < n_args; i++)
{
int offset = (is_method ? 1 : 0);
ainfo = g_callable_info_get_arg ((GICallableInfo *)info, i);
switch (g_arg_info_get_direction (ainfo))
{
case GI_DIRECTION_IN:
tinfo = g_arg_info_get_type (ainfo);
atypes[i+offset] = g_type_info_get_ffi_type (tinfo);
g_base_info_unref ((GIBaseInfo *)tinfo);
break;
case GI_DIRECTION_OUT:
case GI_DIRECTION_INOUT:
atypes[i+offset] = &ffi_type_pointer;
break;
default:
g_assert_not_reached ();
}
g_base_info_unref ((GIBaseInfo *)ainfo);
}
if (throws)
{
atypes[n_invoke_args - 1] = &ffi_type_pointer;
}
return ffi_prep_cif (&(invoker->cif), FFI_DEFAULT_ABI, n_invoke_args, rtype, atypes) == FFI_OK;
}
/**
* g_callable_info_invoke:
* @info: TODO
* @function: TODO
* @in_args: TODO
* @n_in_args: TODO
* @out_args: TODO
* @n_out_args: TODO
* @return_value: TODO
* @is_method: TODO
* @throws: TODO
* @error: TODO
*
* TODO
*/
gboolean
g_callable_info_invoke (GIFunctionInfo *info,
gpointer function,
const GIArgument *in_args,
int n_in_args,
const GIArgument *out_args,
int n_out_args,
GIArgument *return_value,
gboolean is_method,
gboolean throws,
GError **error)
{
ffi_cif cif;
ffi_type *rtype;
ffi_type **atypes;
GITypeInfo *tinfo;
GITypeInfo *rinfo;
GITypeTag rtag;
GIArgInfo *ainfo;
gint n_args, n_invoke_args, in_pos, out_pos, i;
gpointer *args;
gboolean success = FALSE;
GError *local_error = NULL;
gpointer error_address = &local_error;
GIFFIReturnValue ffi_return_value;
gpointer return_value_p; /* Will point inside the union return_value */
rinfo = g_callable_info_get_return_type ((GICallableInfo *)info);
rtype = g_type_info_get_ffi_type (rinfo);
rtag = g_type_info_get_tag(rinfo);
in_pos = 0;
out_pos = 0;
n_args = g_callable_info_get_n_args ((GICallableInfo *)info);
if (is_method)
{
if (n_in_args == 0)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too few \"in\" arguments (handling this)");
goto out;
}
n_invoke_args = n_args+1;
in_pos++;
}
else
n_invoke_args = n_args;
if (throws)
/* Add an argument for the GError */
n_invoke_args ++;
atypes = g_alloca (sizeof (ffi_type*) * n_invoke_args);
args = g_alloca (sizeof (gpointer) * n_invoke_args);
if (is_method)
{
atypes[0] = &ffi_type_pointer;
args[0] = (gpointer) &in_args[0];
}
for (i = 0; i < n_args; i++)
{
int offset = (is_method ? 1 : 0);
ainfo = g_callable_info_get_arg ((GICallableInfo *)info, i);
switch (g_arg_info_get_direction (ainfo))
{
case GI_DIRECTION_IN:
tinfo = g_arg_info_get_type (ainfo);
atypes[i+offset] = g_type_info_get_ffi_type (tinfo);
g_base_info_unref ((GIBaseInfo *)tinfo);
if (in_pos >= n_in_args)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too few \"in\" arguments (handling in)");
goto out;
}
args[i+offset] = (gpointer)&in_args[in_pos];
in_pos++;
break;
case GI_DIRECTION_OUT:
atypes[i+offset] = &ffi_type_pointer;
if (out_pos >= n_out_args)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too few \"out\" arguments (handling out)");
goto out;
}
args[i+offset] = (gpointer)&out_args[out_pos];
out_pos++;
break;
case GI_DIRECTION_INOUT:
atypes[i+offset] = &ffi_type_pointer;
if (in_pos >= n_in_args)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too few \"in\" arguments (handling inout)");
goto out;
}
if (out_pos >= n_out_args)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too few \"out\" arguments (handling inout)");
goto out;
}
args[i+offset] = (gpointer)&in_args[in_pos];
in_pos++;
out_pos++;
break;
default:
g_assert_not_reached ();
}
g_base_info_unref ((GIBaseInfo *)ainfo);
}
if (throws)
{
args[n_invoke_args - 1] = &error_address;
atypes[n_invoke_args - 1] = &ffi_type_pointer;
}
if (in_pos < n_in_args)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too many \"in\" arguments (at end)");
goto out;
}
if (out_pos < n_out_args)
{
g_set_error (error,
G_INVOKE_ERROR,
G_INVOKE_ERROR_ARGUMENT_MISMATCH,
"Too many \"out\" arguments (at end)");
goto out;
}
if (ffi_prep_cif (&cif, FFI_DEFAULT_ABI, n_invoke_args, rtype, atypes) != FFI_OK)
goto out;
g_return_val_if_fail (return_value, FALSE);
/* See comment for GIFFIReturnValue above */
switch (rtag)
{
case GI_TYPE_TAG_FLOAT:
return_value_p = &ffi_return_value.v_float;
break;
case GI_TYPE_TAG_DOUBLE:
return_value_p = &ffi_return_value.v_double;
break;
case GI_TYPE_TAG_INT64:
case GI_TYPE_TAG_UINT64:
return_value_p = &ffi_return_value.v_uint64;
break;
default:
return_value_p = &ffi_return_value.v_long;
}
ffi_call (&cif, function, return_value_p, args);
if (local_error)
{
g_propagate_error (error, local_error);
success = FALSE;
}
else
{
gi_type_info_extract_ffi_return_value (rinfo, &ffi_return_value, return_value);
success = TRUE;
}
out:
g_base_info_unref ((GIBaseInfo *)rinfo);
return success;
}
