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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Authors:
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
#include <sys/types.h>
#include <string.h>
#include "mono-plugin.h"
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/object.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/mono-config.h>
#include <mono/jit/jit.h>
#define d(x) (x)
static MonoDomain *domain;
/* ********************************************************************** */
static gpointer epm_parent_class;
typedef struct _EPluginMonoPrivate {
MonoAssembly *assembly;
MonoClass *klass;
MonoObject *plugin;
GHashTable *methods;
} EPluginMonoPrivate;
#define epm ((EPluginMono *)ep)
gpointer load_plugin_type_register_function (gpointer a, gpointer b);
static gchar *
get_xml_prop(xmlNodePtr node, const gchar *id)
{
gchar *p = xmlGetProp(node, id);
gchar *out = NULL;
if (p) {
out = g_strdup(p);
xmlFree(p);
}
return out;
}
/*
Two approaches:
You can have a Evolution.Plugin implementation which has every callback as methods on it.
Or you can just use static methods for everything.
All methods take a single (structured) argument.
*/
static gpointer
epm_invoke(EPlugin *ep, const gchar *name, gpointer data)
{
EPluginMonoPrivate *p = epm->priv;
MonoMethodDesc *d;
MonoMethod *m;
MonoObject *x = NULL, *res;
gpointer *params;
g_print ("\n\a epm_invoke in mono-plugin.c in mono plugin loader is called \n\a");
/* we need to do this every time since we may be called from any thread for some uses */
mono_thread_attach(domain);
if (p->assembly == NULL) {
p->assembly = mono_domain_assembly_open(domain, epm->location);
if (p->assembly == NULL) {
g_warning("can't load assembly '%s'", epm->location);
return NULL;
}
if (epm->handler == NULL
|| (p->klass = mono_class_from_name(mono_assembly_get_image(p->assembly), "", epm->handler)) == NULL) {
d(printf("Using static callbacks only"));
} else {
p->plugin = mono_object_new(domain, p->klass);
/* could conceivably init with some context too */
mono_runtime_object_init(p->plugin);
}
}
m = g_hash_table_lookup(p->methods, name);
if (m == NULL) {
if (p->klass) {
d(printf("looking up method '%s' in class\n", name));
/* class method */
d = mono_method_desc_new(name, FALSE);
/*if (d == NULL) {
g_warning("Can't create method descriptor for '%s'", name);
return NULL;
}*/
gpointer iter = NULL;
MonoMethod* mono_method;
d(printf ("\n\a About to get methods in klass\n\a"));
while ((mono_method = mono_class_get_methods (p->klass, &iter))) {
g_print ("\n\a Method name is : <%s>\n\a", mono_method_get_name(mono_method));
}
d(printf ("\n\a Got methods in klass \n\a"));
//mono_class_get_method_from_name
m = mono_class_get_method_from_name (p->klass, name, -1);
if (m == NULL) {
g_warning("Can't find method callback '%s'", name);
return NULL;
}
} else {
d(printf("looking up static method '%s'\n", name));
/* static method */
d = mono_method_desc_new(name, FALSE);
if (d == NULL) {
g_warning("Can't create method descriptor for '%s'", name);
return NULL;
}
m = mono_method_desc_search_in_image(d, mono_assembly_get_image(p->assembly));
if (m == NULL) {
g_warning("Can't find method callback '%s'", name);
return NULL;
}
}
g_hash_table_insert(p->methods, g_strdup(name), m);
}
params = g_malloc0(sizeof(*params)*1);
params[0] = &data;
res = mono_runtime_invoke(m, p->plugin, params, &x);
/* do i need to free params?? */
if (x)
mono_print_unhandled_exception(x);
if (res) {
gpointer *p = mono_object_unbox(res);
d(printf("mono method returned '%p' %ld\n", *p, (long int)*p));
return *p;
} else
return NULL;
}
static int
epm_construct(EPlugin *ep, xmlNodePtr root)
{
if (((EPluginClass *)epm_parent_class)->construct(ep, root) == -1)
return -1;
epm->location = get_xml_prop(root, "location");
epm->handler = get_xml_prop(root, "handler");
if (epm->location == NULL)
return -1;
return 0;
}
static void
epm_finalise(GObject *o)
{
EPlugin *ep = (EPlugin *)o;
EPluginMonoPrivate *p = epm->priv;
g_free(epm->location);
g_free(epm->handler);
g_hash_table_destroy(p->methods);
g_free(epm->priv);
((GObjectClass *)epm_parent_class)->finalize(o);
}
static void
epm_class_init(EPluginClass *klass)
{
((GObjectClass *)klass)->finalize = epm_finalise;
klass->construct = epm_construct;
klass->invoke = epm_invoke;
klass->type = "mono";
}
static void
epm_init(GObject *o)
{
EPlugin *ep = (EPlugin *)o;
epm->priv = g_malloc0(sizeof(*epm->priv));
epm->priv->methods = g_hash_table_new_full(
g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) NULL);
}
gpointer
load_plugin_type_register_function (gpointer a, gpointer b)
{
static GType type = 0;
if (!type) {
static const GTypeInfo info = {
sizeof(EPluginMonoClass), NULL, NULL, (GClassInitFunc) epm_class_init, NULL, NULL,
sizeof(EPluginMono), 0, (GInstanceInitFunc) epm_init,
};
epm_parent_class = g_type_class_ref(e_plugin_get_type());
type = g_type_register_static(e_plugin_get_type(), "EPluginMono", &info, 0);
e_plugin_register_type (type);
d(printf("\nType EPluginMono registered from the mono-plugin-loader\n"));
domain = mono_jit_init("Evolution");
mono_thread_attach(domain);
}
return GUINT_TO_POINTER(type);
}
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