3 /* amok peer management - servers main loop and remote peer stopping */
5 /* Copyright (c) 2006 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "xbt/sysdep.h"
12 #include "amok/peermanagement.h"
14 #include "amok/amok_modinter.h" /* prototype of my module declaration */
15 #include "gras/module.h" /* module mecanism */
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(amok_pm,amok,"peer management");
21 int amok_pm_moddata_id=-1;
25 } s_amok_pm_moddata_t, *amok_pm_moddata_t;
27 /* Payload of join message */
31 } s_amok_pm_msg_join_t,*amok_pm_msg_join_t;
33 /* Message callbacks */
34 static int amok_pm_cb_kill(gras_msg_cb_ctx_t ctx,
37 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
41 static int amok_pm_cb_killrpc(gras_msg_cb_ctx_t ctx,
44 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
46 gras_msg_rpcreturn(30,ctx,NULL);
50 static int amok_pm_cb_get(gras_msg_cb_ctx_t ctx, void *payload) {
51 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
52 char *name = *(void**)payload;
53 xbt_dynar_t res = xbt_dict_get(g->groups, name);
55 gras_msg_rpcreturn(30, ctx, &res);
58 static int amok_pm_cb_join(gras_msg_cb_ctx_t ctx, void *payload) {
59 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
60 amok_pm_msg_join_t msg = *(amok_pm_msg_join_t*)payload;
61 xbt_dynar_t group = xbt_dict_get(g->groups, msg->group);
63 gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
64 xbt_peer_t dude = xbt_peer_new(gras_socket_peer_name(exp),
65 gras_socket_peer_port(exp));
66 xbt_peer_t previous = NULL;
68 if (msg->rank >= 0 && xbt_dynar_length(group) >= msg->rank +1)
69 xbt_dynar_get_cpy(group,msg->rank,&previous);
71 VERB3("Contacted by %s:%d for rank %d",dude->name,dude->port,msg->rank);
73 xbt_dynar_push(group,&dude);
76 THROW4(arg_error,0,"You wanted to get rank %d of group %s, but %s:%d is already there",
77 msg->rank, msg->group, previous->name, previous->port);
78 xbt_dynar_set(group,msg->rank,&dude);
81 gras_msg_rpcreturn(10, ctx, NULL);
86 static int amok_pm_cb_leave(gras_msg_cb_ctx_t ctx, void *payload) {
87 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
88 char *name = *(void**)payload;
89 xbt_dynar_t group = xbt_dict_get(g->groups, name);
91 gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
92 xbt_peer_t dude = xbt_peer_new(gras_socket_peer_name(exp),
93 gras_socket_peer_port(exp));
98 xbt_dynar_foreach(group, cpt, peer_it) {
99 if (!strcmp(peer_it->name, dude->name) &&
100 peer_it->port == dude->port) {
101 xbt_dynar_cursor_rm (group,&cpt);
105 WARN3("Asked to remove %s:%d from group '%s', but not found. Ignoring",
106 dude->name,dude->port, name);
109 gras_msg_rpcreturn(30, ctx, NULL);
113 static int amok_pm_cb_shutdown(gras_msg_cb_ctx_t ctx, void *payload) {
114 char *name = *(void**)payload;
115 amok_pm_group_shutdown(name);
117 gras_msg_rpcreturn(30, ctx, NULL);
121 /** \brief Enter the main loop of the program. It won't return until we get a kill message. */
122 void amok_pm_mainloop(double timeOut) {
123 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
126 gras_msg_handle(timeOut);
130 /** \brief kill a buddy identified by its peername and port. Note that it is not removed from any group it may belong to. */
131 void amok_pm_kill_hp(char *name,int port) {
132 gras_socket_t sock=gras_socket_client(name,port);
134 gras_socket_close(sock);
137 /** \brief kill a buddy to which we have a socket already. Note that it is not removed from any group it may belong to. */
138 void amok_pm_kill(gras_socket_t buddy) {
139 gras_msg_send(buddy,"amok_pm_kill",NULL);
142 /** \brief kill syncronously a buddy (do not return before its death). Note that it is not removed from any group it may belong to. */
143 void amok_pm_kill_sync(gras_socket_t buddy) {
144 gras_msg_rpccall(buddy,30,"amok_pm_killrpc",NULL,NULL);
148 /** \brief create a new peermanagement group located on local peer
150 * The dynar elements are of type xbt_peer_t
152 xbt_dynar_t amok_pm_group_new(const char *group_name) {
154 xbt_dynar_t res = xbt_dynar_new(sizeof(xbt_peer_t),
155 xbt_peer_free_voidp);
157 xbt_assert0(amok_pm_moddata_id != -1,"Run amok_pm_init first!");
158 g=gras_moddata_by_id(amok_pm_moddata_id);
160 DEBUG1("retrieved groups=%p",g->groups);
162 xbt_dict_set(g->groups,group_name,res,NULL); /*FIXME: leaking xbt_dynar_free_voidp);*/
163 VERB1("Group %s created",group_name);
167 /** \brief retrieve all members of the given remote group */
168 xbt_dynar_t amok_pm_group_get(gras_socket_t master, const char *group_name) {
171 gras_msg_rpccall(master,30,"amok_pm_get", &group_name,&res);
175 /** \brief add current peer to the given remote group
177 * You should provide rank only when you want to force the order of members
178 * (for example in strict test cases). Give -1 to leave the system choose it for you.
180 void amok_pm_group_join(gras_socket_t master, const char *group_name,int rank) {
181 amok_pm_msg_join_t msg = xbt_new(s_amok_pm_msg_join_t,1);
182 msg->group = (char*)group_name;
184 VERB4("Join group '%s' on %s:%d (at rank %d)",
185 group_name,gras_socket_peer_name(master),gras_socket_peer_port(master),rank);
186 gras_msg_rpccall(master,30,"amok_pm_join", &msg,NULL);
188 VERB3("Joined group '%s' on %s:%d",
189 group_name,gras_socket_peer_name(master),gras_socket_peer_port(master));
191 /** \brief remove current peer from the given remote group if found
193 * If not found, call is ignored
195 void amok_pm_group_leave(gras_socket_t master, const char *group_name) {
196 gras_msg_rpccall(master,30,"amok_pm_leave", &group_name,NULL);
197 VERB3("Leaved group '%s' on %s:%d",
198 group_name,gras_socket_peer_name(master),gras_socket_peer_port(master));
201 /** \brief stops all members of the given local group */
202 void amok_pm_group_shutdown(const char *group_name) {
203 amok_pm_moddata_t g=gras_moddata_by_id(amok_pm_moddata_id);
204 xbt_dynar_t group = xbt_dict_get(g->groups, group_name);
209 xbt_dynar_foreach(group, cpt, peer_it) {
210 amok_pm_kill_hp(peer_it->name, peer_it->port);
213 xbt_dynar_free(&group);
214 xbt_dict_remove(g->groups,group_name);
216 /** \brief stops all members of the given remote group */
217 void amok_pm_group_shutdown_remote(gras_socket_t master, const char *group_name){
218 gras_msg_rpccall(master,30,"amok_pm_shutdown", &group_name,NULL);
224 * * Module management functions
230 static void _amok_pm_init(void) {
231 /* no world-wide globals */
232 /* Datatype and message declarations */
233 gras_datadesc_type_t pm_group_type = gras_datadesc_dynar(gras_datadesc_by_name("xbt_peer_t"), xbt_peer_free_voidp);
235 gras_datadesc_type_t msg_join_t = gras_datadesc_struct("s_amok_pm_moddata_t");
236 gras_datadesc_struct_append(msg_join_t,"group", gras_datadesc_by_name("string"));
237 gras_datadesc_struct_append(msg_join_t,"rank", gras_datadesc_by_name("int"));
238 gras_datadesc_struct_close(msg_join_t);
239 msg_join_t=gras_datadesc_ref("amok_pm_moddata_t", gras_datadesc_by_name("s_amok_pm_moddata_t"));
241 gras_msgtype_declare("amok_pm_kill",NULL);
242 gras_msgtype_declare_rpc("amok_pm_killrpc",NULL,NULL);
244 gras_msgtype_declare_rpc("amok_pm_get",
245 gras_datadesc_by_name("string"),
247 gras_msgtype_declare_rpc("amok_pm_join", msg_join_t,NULL);
248 gras_msgtype_declare_rpc("amok_pm_leave",
249 gras_datadesc_by_name("string"),
252 gras_msgtype_declare_rpc("amok_pm_shutdown",
253 gras_datadesc_by_name("string"),
257 static void _amok_pm_join(void *p) {
258 /* moddata management */
259 amok_pm_moddata_t mod = (amok_pm_moddata_t)p;
264 mod->groups = xbt_dict_new();
267 gras_cb_register("amok_pm_kill", &amok_pm_cb_kill);
268 gras_cb_register("amok_pm_killrpc",&amok_pm_cb_killrpc);
270 gras_cb_register("amok_pm_get", &amok_pm_cb_get);
271 gras_cb_register("amok_pm_join", &amok_pm_cb_join);
272 gras_cb_register("amok_pm_leave", &amok_pm_cb_leave);
273 gras_cb_register("amok_pm_shutdown", &amok_pm_cb_shutdown);
275 static void _amok_pm_exit(void) {
276 /* no world-wide globals */
278 static void _amok_pm_leave(void *p) {
280 amok_pm_moddata_t mod = (amok_pm_moddata_t)p;
283 xbt_dict_free(&mod->groups);
286 gras_cb_unregister("amok_pm_kill", &amok_pm_cb_kill);
287 gras_cb_unregister("amok_pm_killrpc",&amok_pm_cb_killrpc);
289 gras_cb_unregister("amok_pm_get", &amok_pm_cb_get);
290 gras_cb_unregister("amok_pm_join", &amok_pm_cb_join);
291 gras_cb_unregister("amok_pm_leave", &amok_pm_cb_leave);
292 gras_cb_unregister("amok_pm_shutdown", &amok_pm_cb_shutdown);
295 void amok_pm_modulecreate() {
296 gras_module_add("amok_pm", sizeof(s_amok_pm_moddata_t), &amok_pm_moddata_id,
297 _amok_pm_init,_amok_pm_exit,_amok_pm_join,_amok_pm_leave);
304 * * Old module functions (kept for compatibility)
307 /** \brief Initialize the peer management module. Every process must run it before use */
308 void amok_pm_init() {
309 gras_module_join("amok_pm");
312 /** \brief Finalize the peer management module. Every process should run it after use */
313 void amok_pm_exit() {
314 gras_module_leave("amok_pm");