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girffi: Add new g_function_invoker_new_for_address

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This is a new method designed to make a GIFunctionInvoker for
any GICallableInfo*, for bindings to use.
This commit is contained in:
Jasper St. Pierre 2011-11-28 14:51:04 -05:00
parent 3e1486f924
commit a0d19ca066
2 changed files with 70 additions and 14 deletions
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79
girffi.c
View File

@ -230,13 +230,7 @@ g_function_info_prep_invoker (GIFunctionInfo *info,
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;
gpointer addr;
g_return_val_if_fail (info != NULL, FALSE);
g_return_val_if_fail (invoker != NULL, FALSE);
@ -244,7 +238,7 @@ g_function_info_prep_invoker (GIFunctionInfo *info,
symbol = g_function_info_get_symbol ((GIFunctionInfo*) info);
if (!g_typelib_symbol (g_base_info_get_typelib((GIBaseInfo *) info),
symbol, &(invoker->native_address)))
symbol, &addr))
{
g_set_error (error,
G_INVOKE_ERROR,
@ -254,15 +248,72 @@ g_function_info_prep_invoker (GIFunctionInfo *info,
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;
return g_function_invoker_new_for_address (addr, info, invoker, error);
}
tinfo = g_callable_info_get_return_type ((GICallableInfo *)info);
/**
* g_function_invoker_new_for_address:
* @addr: The address
* @info: A #GICallableInfo
* @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_invoker_new_for_address (gpointer addr,
GICallableInfo *info,
GIFunctionInvoker *invoker,
GError **error)
{
ffi_type *rtype;
ffi_type **atypes;
GITypeInfo *tinfo;
GIArgInfo *ainfo;
GIInfoType info_type;
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);
invoker->native_address = addr;
info_type = g_base_info_get_type ((GIBaseInfo *) info);
switch (info_type)
{
case GI_INFO_TYPE_FUNCTION:
{
GIFunctionInfoFlags flags;
flags = g_function_info_get_flags ((GIFunctionInfo *)info);
is_method = (flags & GI_FUNCTION_IS_METHOD) != 0;
throws = (flags & GI_FUNCTION_THROWS) != 0;
}
break;
case GI_INFO_TYPE_CALLBACK:
case GI_INFO_TYPE_VFUNC:
is_method = TRUE;
throws = FALSE;
break;
default:
g_assert_not_reached ();
}
tinfo = g_callable_info_get_return_type (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);
n_args = g_callable_info_get_n_args (info);
if (is_method)
n_invoke_args = n_args+1;
else
@ -282,7 +333,7 @@ g_function_info_prep_invoker (GIFunctionInfo *info,
for (i = 0; i < n_args; i++)
{
int offset = (is_method ? 1 : 0);
ainfo = g_callable_info_get_arg ((GICallableInfo *)info, i);
ainfo = g_callable_info_get_arg (info, i);
switch (g_arg_info_get_direction (ainfo))
{
case GI_DIRECTION_IN:

5
girffi.h
View File

@ -53,6 +53,11 @@ gboolean g_function_info_prep_invoker (GIFunctionInfo *info,
GIFunctionInvoker *invoker,
GError **error);
gboolean g_function_invoker_new_for_address (gpointer addr,
GICallableInfo *info,
GIFunctionInvoker *invoker,
GError **error);
void g_function_invoker_destroy (GIFunctionInvoker *invoker);