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 /* Message callbacks */
28 static int amok_pm_cb_kill(gras_msg_cb_ctx_t ctx, void *payload_data)
31 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
36 static int amok_pm_cb_killrpc(gras_msg_cb_ctx_t ctx, void *payload_data)
39 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
41 gras_msg_rpcreturn(30, ctx, NULL);
45 static int amok_pm_cb_get(gras_msg_cb_ctx_t ctx, void *payload)
47 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
48 char *name = *(void **) payload;
49 xbt_dynar_t res = xbt_dict_get(g->groups, name);
51 gras_msg_rpcreturn(30, ctx, &res);
55 static int amok_pm_cb_join(gras_msg_cb_ctx_t ctx, void *payload)
57 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
58 char* group_name = *(char* *) payload;
59 xbt_dynar_t group = xbt_dict_get(g->groups, group_name);
62 gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
63 xbt_peer_t dude = xbt_peer_new(gras_socket_peer_name(exp),
64 gras_socket_peer_port(exp));
66 rank = xbt_dynar_length(group);
67 xbt_dynar_push(group, &dude);
68 VERB3("Contacted by %s:%d. Give it rank #%d", dude->name, dude->port,rank);
70 gras_msg_rpcreturn(10, ctx, &rank);
75 static int amok_pm_cb_leave(gras_msg_cb_ctx_t ctx, void *payload)
77 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
78 char *name = *(void **) payload;
79 xbt_dynar_t group = xbt_dict_get(g->groups, name);
81 gras_socket_t exp = gras_msg_cb_ctx_from(ctx);
82 xbt_peer_t dude = xbt_peer_new(gras_socket_peer_name(exp),
83 gras_socket_peer_port(exp));
88 xbt_dynar_foreach(group, cpt, peer_it) {
89 if (!strcmp(peer_it->name, dude->name) && peer_it->port == dude->port) {
90 xbt_dynar_cursor_rm(group, &cpt);
94 WARN3("Asked to remove %s:%d from group '%s', but not found. Ignoring",
95 dude->name, dude->port, name);
98 gras_msg_rpcreturn(30, ctx, NULL);
102 static int amok_pm_cb_shutdown(gras_msg_cb_ctx_t ctx, void *payload)
104 char *name = *(void **) payload;
105 amok_pm_group_shutdown(name);
107 gras_msg_rpcreturn(30, ctx, NULL);
111 /** \brief Enter the main loop of the program. It won't return until we get a kill message. */
112 void amok_pm_mainloop(double timeOut)
114 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
117 gras_msg_handle(timeOut);
121 /** \brief kill a buddy identified by its peername and port. Note that it is not removed from any group it may belong to. */
122 void amok_pm_kill_hp(char *name, int port)
124 gras_socket_t sock = gras_socket_client(name, port);
126 gras_socket_close(sock);
129 /** \brief kill a buddy to which we have a socket already. Note that it is not removed from any group it may belong to. */
130 void amok_pm_kill(gras_socket_t buddy)
132 gras_msg_send(buddy, "amok_pm_kill", NULL);
135 /** \brief kill syncronously a buddy (do not return before its death). Note that it is not removed from any group it may belong to. */
136 void amok_pm_kill_sync(gras_socket_t buddy)
138 gras_msg_rpccall(buddy, 30, "amok_pm_killrpc", NULL, NULL);
142 /** \brief create a new peermanagement group located on local peer
144 * The dynar elements are of type xbt_peer_t
146 xbt_dynar_t amok_pm_group_new(const char *group_name)
149 xbt_dynar_t res = xbt_dynar_new(sizeof(xbt_peer_t),
150 xbt_peer_free_voidp);
152 xbt_assert0(amok_pm_moddata_id != -1, "Run amok_pm_init first!");
153 g = gras_moddata_by_id(amok_pm_moddata_id);
155 DEBUG1("retrieved groups=%p", g->groups);
157 xbt_dict_set(g->groups, group_name, res, NULL); /*FIXME: leaking xbt_dynar_free_voidp); */
158 VERB1("Group %s created", group_name);
163 /** \brief retrieve all members of the given remote group */
164 xbt_dynar_t amok_pm_group_get(gras_socket_t master, const char *group_name)
168 gras_msg_rpccall(master, 30, "amok_pm_get", &group_name, &res);
172 /** \brief add current peer to the given remote group
174 * Returns the rank of the process in the group.
176 int amok_pm_group_join(gras_socket_t master, const char *group_name)
179 VERB3("Join group '%s' on %s:%d",
180 group_name, gras_socket_peer_name(master),
181 gras_socket_peer_port(master));
182 gras_msg_rpccall(master, 30, "amok_pm_join", &group_name, &rank);
183 VERB4("Joined group '%s' on %s:%d. Got rank %d",
184 group_name, gras_socket_peer_name(master),
185 gras_socket_peer_port(master),
190 /** \brief remove current peer from the given remote group if found
192 * If not found, call is ignored
194 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),
199 gras_socket_peer_port(master));
202 /** \brief stops all members of the given local group */
203 void amok_pm_group_shutdown(const char *group_name)
205 amok_pm_moddata_t g = gras_moddata_by_id(amok_pm_moddata_id);
206 xbt_dynar_t group = xbt_dict_get(g->groups, group_name);
211 xbt_dynar_foreach(group, cpt, peer_it) {
212 amok_pm_kill_hp(peer_it->name, peer_it->port);
215 xbt_dynar_free(&group);
216 xbt_dict_remove(g->groups, group_name);
219 /** \brief stops all members of the given remote group */
220 void amok_pm_group_shutdown_remote(gras_socket_t master,
221 const char *group_name)
223 gras_msg_rpccall(master, 30, "amok_pm_shutdown", &group_name, NULL);
229 * * Module management functions
235 static void _amok_pm_init(void)
237 /* no world-wide globals */
238 /* Datatype and message declarations */
239 gras_datadesc_type_t pm_group_type =
240 gras_datadesc_dynar(gras_datadesc_by_name("xbt_peer_t"),
241 xbt_peer_free_voidp);
243 gras_msgtype_declare("amok_pm_kill", NULL);
244 gras_msgtype_declare_rpc("amok_pm_killrpc", NULL, NULL);
246 gras_msgtype_declare_rpc("amok_pm_get",
247 gras_datadesc_by_name("string"), pm_group_type);
248 gras_msgtype_declare_rpc("amok_pm_join", gras_datadesc_by_name("string"), gras_datadesc_by_name("int"));
249 gras_msgtype_declare_rpc("amok_pm_leave",
250 gras_datadesc_by_name("string"), NULL);
252 gras_msgtype_declare_rpc("amok_pm_shutdown",
253 gras_datadesc_by_name("string"), NULL);
256 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);
276 static void _amok_pm_exit(void)
278 /* no world-wide globals */
281 static void _amok_pm_leave(void *p)
284 amok_pm_moddata_t mod = (amok_pm_moddata_t) p;
287 xbt_dict_free(&mod->groups);
290 gras_cb_unregister("amok_pm_kill", &amok_pm_cb_kill);
291 gras_cb_unregister("amok_pm_killrpc", &amok_pm_cb_killrpc);
293 gras_cb_unregister("amok_pm_get", &amok_pm_cb_get);
294 gras_cb_unregister("amok_pm_join", &amok_pm_cb_join);
295 gras_cb_unregister("amok_pm_leave", &amok_pm_cb_leave);
296 gras_cb_unregister("amok_pm_shutdown", &amok_pm_cb_shutdown);
299 void amok_pm_modulecreate()
301 gras_module_add("amok_pm", sizeof(s_amok_pm_moddata_t), &amok_pm_moddata_id,
302 _amok_pm_init, _amok_pm_exit, _amok_pm_join,
310 * * Old module functions (kept for compatibility)
313 /** \brief Initialize the peer management module. Every process must run it before use */
316 gras_module_join("amok_pm");
319 /** \brief Finalize the peer management module. Every process should run it after use */
322 gras_module_leave("amok_pm");