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Direct context switching: clean the semantics of parmap
[simgrid.git] / src / surf / surf_routing_floyd.c
1 /* Copyright (c) 2009, 2010, 2011. The SimGrid Team.
2  * All rights reserved.                                                     */
3
4 /* This program is free software; you can redistribute it and/or modify it
5  * under the terms of the license (GNU LGPL) which comes with this package. */
6
7 #include "surf_routing_private.h"
8
9 /* Global vars */
10 extern routing_global_t global_routing;
11 extern routing_component_t current_routing;
12 extern model_type_t current_routing_model;
13
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_route_floyd, surf, "Routing part of surf");
15
16 #define TO_FLOYD_COST(i,j) (routing->cost_table)[(i)+(j)*table_size]
17 #define TO_FLOYD_PRED(i,j) (routing->predecessor_table)[(i)+(j)*table_size]
18 #define TO_FLOYD_LINK(i,j) (routing->link_table)[(i)+(j)*table_size]
19
20 /* Routing model structure */
21
22 typedef struct {
23   s_routing_component_t generic_routing;
24   /* vars for calculate the floyd algorith. */
25   int *predecessor_table;
26   double *cost_table;
27   route_extended_t *link_table; /* char* -> int* */
28 } s_routing_component_floyd_t, *routing_component_floyd_t;
29
30 static route_extended_t floyd_get_route(routing_component_t rc,
31                                         const char *src, const char *dst);
32
33 /* Business methods */
34 static xbt_dynar_t floyd_get_onelink_routes(routing_component_t rc)
35 {
36   xbt_dynar_t ret = xbt_dynar_new(sizeof(onelink_t), xbt_free);
37
38   routing_component_floyd_t routing = (routing_component_floyd_t) rc;
39   //size_t table_size = xbt_dict_length(routing->generic_routing.to_index);
40   xbt_dict_cursor_t c1 = NULL, c2 = NULL;
41   char *k1, *d1, *k2, *d2;
42   xbt_dict_foreach(routing->generic_routing.to_index, c1, k1, d1) {
43     xbt_dict_foreach(routing->generic_routing.to_index, c2, k2, d2) {
44       route_extended_t route = floyd_get_route(rc, k1, k2);
45       if (route) {
46         if (xbt_dynar_length(route->generic_route.link_list) == 1) {
47           void *link =
48               *(void **) xbt_dynar_get_ptr(route->generic_route.link_list,
49                                            0);
50           onelink_t onelink = xbt_new0(s_onelink_t, 1);
51           onelink->link_ptr = link;
52           if (routing->generic_routing.hierarchy == SURF_ROUTING_BASE) {
53             onelink->src = xbt_strdup(k1);
54             onelink->dst = xbt_strdup(k2);
55           } else if (routing->generic_routing.hierarchy ==
56                      SURF_ROUTING_RECURSIVE) {
57             onelink->src = xbt_strdup(route->src_gateway);
58             onelink->dst = xbt_strdup(route->dst_gateway);
59           }
60           xbt_dynar_push(ret, &onelink);
61         }
62       }
63     }
64   }
65   return ret;
66 }
67
68 static route_extended_t floyd_get_route(routing_component_t rc,
69                                         const char *src, const char *dst)
70 {
71   xbt_assert(rc && src
72               && dst,
73               "Invalid params for \"get_route\" function at AS \"%s\"",
74               rc->name);
75
76   /* set utils vars */
77   routing_component_floyd_t routing = (routing_component_floyd_t) rc;
78   size_t table_size = xbt_dict_length(routing->generic_routing.to_index);
79
80   generic_src_dst_check(rc, src, dst);
81   int *src_id = xbt_dict_get_or_null(routing->generic_routing.to_index, src);
82   int *dst_id = xbt_dict_get_or_null(routing->generic_routing.to_index, dst);
83   xbt_assert(src_id
84               && dst_id,
85               "Ask for route \"from\"(%s)  or \"to\"(%s) no found in the local table",
86               src, dst);
87
88   /* create a result route */
89   route_extended_t new_e_route = xbt_new0(s_route_extended_t, 1);
90   new_e_route->generic_route.link_list =
91       xbt_dynar_new(global_routing->size_of_link, NULL);
92   new_e_route->src_gateway = NULL;
93   new_e_route->dst_gateway = NULL;
94
95   int first = 1;
96   int pred = *dst_id;
97   int prev_pred = 0;
98   char *gw_src = NULL, *gw_dst = NULL, *prev_gw_src, *first_gw = NULL;
99   unsigned int cpt;
100   void *link;
101   xbt_dynar_t links;
102
103   do {
104     prev_pred = pred;
105     pred = TO_FLOYD_PRED(*src_id, pred);
106     if (pred == -1)             /* if no pred in route -> no route to host */
107       break;
108     xbt_assert(TO_FLOYD_LINK(pred, prev_pred),
109                 "Invalid link for the route between \"%s\" or \"%s\"", src,
110                 dst);
111
112     prev_gw_src = gw_src;
113
114     route_extended_t e_route = TO_FLOYD_LINK(pred, prev_pred);
115     gw_src = e_route->src_gateway;
116     gw_dst = e_route->dst_gateway;
117
118     if (first)
119       first_gw = gw_dst;
120
121     if (rc->hierarchy == SURF_ROUTING_RECURSIVE && !first
122         && strcmp(gw_dst, prev_gw_src)) {
123       xbt_dynar_t e_route_as_to_as =
124           (*(global_routing->get_route)) (gw_dst, prev_gw_src);
125       xbt_assert(e_route_as_to_as, "no route between \"%s\" and \"%s\"",
126                   gw_dst, prev_gw_src);
127       links = e_route_as_to_as;
128       int pos = 0;
129       xbt_dynar_foreach(links, cpt, link) {
130         xbt_dynar_insert_at(new_e_route->generic_route.link_list, pos,
131                             &link);
132         pos++;
133       }
134     }
135
136     links = e_route->generic_route.link_list;
137     xbt_dynar_foreach(links, cpt, link) {
138       xbt_dynar_unshift(new_e_route->generic_route.link_list, &link);
139     }
140     first = 0;
141
142   } while (pred != *src_id);
143   xbt_assert(pred != -1, "no route from host %d to %d (\"%s\" to \"%s\")",
144               *src_id, *dst_id, src, dst);
145
146   if (rc->hierarchy == SURF_ROUTING_RECURSIVE) {
147     new_e_route->src_gateway = xbt_strdup(gw_src);
148     new_e_route->dst_gateway = xbt_strdup(first_gw);
149   }
150
151   return new_e_route;
152 }
153
154 static void floyd_finalize(routing_component_t rc)
155 {
156   routing_component_floyd_t routing = (routing_component_floyd_t) rc;
157   int i, j;
158   size_t table_size;
159   if (routing) {
160     table_size = xbt_dict_length(routing->generic_routing.to_index);
161     /* Delete link_table */
162     for (i = 0; i < table_size; i++)
163       for (j = 0; j < table_size; j++)
164         generic_free_extended_route(TO_FLOYD_LINK(i, j));
165     xbt_free(routing->link_table);
166     /* Delete bypass dict */
167     xbt_dict_free(&routing->generic_routing.bypassRoutes);
168     /* Delete index dict */
169     xbt_dict_free(&(routing->generic_routing.to_index));
170     /* Delete dictionary index dict, predecessor and links table */
171     xbt_free(routing->predecessor_table);
172     /* Delete structure */
173     xbt_free(rc);
174   }
175 }
176
177 void *model_floyd_create(void)
178 {
179   routing_component_floyd_t new_component =
180       xbt_new0(s_routing_component_floyd_t, 1);
181   new_component->generic_routing.set_processing_unit =
182       generic_set_processing_unit;
183   new_component->generic_routing.set_autonomous_system =
184       generic_set_autonomous_system;
185   new_component->generic_routing.set_route = model_floyd_set_route;
186   new_component->generic_routing.set_ASroute = model_floyd_set_route;
187   new_component->generic_routing.set_bypassroute = generic_set_bypassroute;
188   new_component->generic_routing.get_route = floyd_get_route;
189   new_component->generic_routing.get_latency = generic_get_link_latency;
190   new_component->generic_routing.get_onelink_routes =
191       floyd_get_onelink_routes;
192   new_component->generic_routing.get_bypass_route =
193       generic_get_bypassroute;
194   new_component->generic_routing.finalize = floyd_finalize;
195   new_component->generic_routing.to_index = xbt_dict_new();
196   new_component->generic_routing.bypassRoutes = xbt_dict_new();
197   new_component->generic_routing.get_network_element_type = get_network_element_type;
198   return new_component;
199 }
200
201 void model_floyd_load(void)
202 {
203   /* use "surfxml_add_callback" to add a parse function call */
204 }
205
206 void model_floyd_unload(void)
207 {
208   /* use "surfxml_del_callback" to remove a parse function call */
209 }
210
211 void model_floyd_end(void)
212 {
213
214         routing_component_floyd_t routing =
215           ((routing_component_floyd_t) current_routing);
216
217         unsigned int i, j, a, b, c;
218
219         /* set the size of table routing */
220         size_t table_size = xbt_dict_length(routing->generic_routing.to_index);
221
222         if(!routing->link_table)
223         {
224                 /* Create Cost, Predecessor and Link tables */
225                 routing->cost_table = xbt_new0(double, table_size * table_size);       /* link cost from host to host */
226                 routing->predecessor_table = xbt_new0(int, table_size * table_size);  /* predecessor host numbers */
227                 routing->link_table = xbt_new0(route_extended_t, table_size * table_size);    /* actual link between src and dst */
228
229                 /* Initialize costs and predecessors */
230                 for (i = 0; i < table_size; i++)
231                 for (j = 0; j < table_size; j++) {
232                   TO_FLOYD_COST(i, j) = DBL_MAX;
233                   TO_FLOYD_PRED(i, j) = -1;
234                   TO_FLOYD_LINK(i, j) = NULL;       /* fixed, missing in the previous version */
235                 }
236         }
237
238         /* Add the loopback if needed */
239         if (current_routing->hierarchy == SURF_ROUTING_BASE) {
240                 for (i = 0; i < table_size; i++) {
241                   route_extended_t e_route = TO_FLOYD_LINK(i, i);
242                   if (!e_route) {
243                         e_route = xbt_new0(s_route_extended_t, 1);
244                         e_route->src_gateway = NULL;
245                         e_route->dst_gateway = NULL;
246                         e_route->generic_route.link_list =
247                                 xbt_dynar_new(global_routing->size_of_link, NULL);
248                         xbt_dynar_push(e_route->generic_route.link_list,
249                                                    &global_routing->loopback);
250                         TO_FLOYD_LINK(i, i) = e_route;
251                         TO_FLOYD_PRED(i, i) = i;
252                         TO_FLOYD_COST(i, i) = 1;
253                   }
254                 }
255         }
256         /* Calculate path costs */
257         for (c = 0; c < table_size; c++) {
258                 for (a = 0; a < table_size; a++) {
259                   for (b = 0; b < table_size; b++) {
260                         if (TO_FLOYD_COST(a, c) < DBL_MAX && TO_FLOYD_COST(c, b) < DBL_MAX) {
261                           if (TO_FLOYD_COST(a, b) == DBL_MAX ||
262                                   (TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b) <
263                                    TO_FLOYD_COST(a, b))) {
264                                 TO_FLOYD_COST(a, b) =
265                                         TO_FLOYD_COST(a, c) + TO_FLOYD_COST(c, b);
266                                 TO_FLOYD_PRED(a, b) = TO_FLOYD_PRED(c, b);
267                           }
268                         }
269                   }
270                 }
271         }
272 }
273
274 void model_floyd_set_route(routing_component_t rc, const char *src,
275         const char *dst, name_route_extended_t route)
276 {
277         routing_component_floyd_t routing = (routing_component_floyd_t) rc;
278
279         /* set the size of table routing */
280         size_t table_size = xbt_dict_length(rc->to_index);
281         int *src_id, *dst_id;
282         int i,j;
283
284         src_id = xbt_dict_get_or_null(rc->to_index, src);
285         dst_id = xbt_dict_get_or_null(rc->to_index, dst);
286
287         xbt_assert(src_id, "Network elements %s not found", src);
288         xbt_assert(dst_id, "Network elements %s not found", dst);
289
290         if(!routing->link_table)
291         {
292                 /* Create Cost, Predecessor and Link tables */
293                 routing->cost_table = xbt_new0(double, table_size * table_size);       /* link cost from host to host */
294                 routing->predecessor_table = xbt_new0(int, table_size * table_size);  /* predecessor host numbers */
295                 routing->link_table = xbt_new0(route_extended_t, table_size * table_size);    /* actual link between src and dst */
296
297                 /* Initialize costs and predecessors */
298                 for (i = 0; i < table_size; i++)
299                 for (j = 0; j < table_size; j++) {
300                   TO_FLOYD_COST(i, j) = DBL_MAX;
301                   TO_FLOYD_PRED(i, j) = -1;
302                   TO_FLOYD_LINK(i, j) = NULL;       /* fixed, missing in the previous version */
303                 }
304         }
305
306         if(TO_FLOYD_LINK(*src_id, *dst_id))
307         {
308                 if(!route->dst_gateway && !route->src_gateway)
309                         XBT_DEBUG("See Route from \"%s\" to \"%s\"", src, dst);
310                 else
311                         XBT_DEBUG("See ASroute from \"%s(%s)\" to \"%s(%s)\"", src,
312                                  route->src_gateway, dst, route->dst_gateway);
313                 char * link_name;
314                 unsigned int cpt;
315                 xbt_dynar_t link_route_to_test = xbt_dynar_new(global_routing->size_of_link, NULL);
316                 xbt_dynar_foreach(route->generic_route.link_list,cpt,link_name)
317                 {
318                         void *link = xbt_lib_get_or_null(link_lib, link_name, SURF_LINK_LEVEL);
319                         xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
320                         xbt_dynar_push(link_route_to_test,&link);
321                 }
322                 xbt_assert(!xbt_dynar_compare(
323                           (void*)TO_FLOYD_LINK(*src_id, *dst_id)->generic_route.link_list,
324                           (void*)link_route_to_test,
325                           (int_f_cpvoid_cpvoid_t) surf_pointer_resource_cmp),
326                           "The route between \"%s\" and \"%s\" already exists", src,dst);
327         }
328         else
329         {
330                 if(!route->dst_gateway && !route->src_gateway)
331                   XBT_DEBUG("Load Route from \"%s\" to \"%s\"", src, dst);
332                 else{
333                         XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", src,
334                                  route->src_gateway, dst, route->dst_gateway);
335                         if(global_routing->get_network_element_type((const char*)route->dst_gateway) == SURF_NETWORK_ELEMENT_NULL)
336                                 xbt_die("The dst_gateway '%s' does not exist!",route->dst_gateway);
337                         if(global_routing->get_network_element_type((const char*)route->src_gateway) == SURF_NETWORK_ELEMENT_NULL)
338                                 xbt_die("The src_gateway '%s' does not exist!",route->src_gateway);
339                 }
340             TO_FLOYD_LINK(*src_id, *dst_id) =
341                         generic_new_extended_route(rc->hierarchy, route, 1);
342             TO_FLOYD_PRED(*src_id, *dst_id) = *src_id;
343             TO_FLOYD_COST(*src_id, *dst_id) =
344                         ((TO_FLOYD_LINK(*src_id, *dst_id))->generic_route.link_list)->used;   /* count of links, old model assume 1 */
345         }
346
347         if( A_surfxml_route_symmetrical == A_surfxml_route_symmetrical_YES
348                 || A_surfxml_ASroute_symmetrical == A_surfxml_ASroute_symmetrical_YES )
349         {
350                 if(TO_FLOYD_LINK(*dst_id, *src_id))
351                 {
352                         if(!route->dst_gateway && !route->src_gateway)
353                           XBT_DEBUG("See Route from \"%s\" to \"%s\"", dst, src);
354                         else
355                           XBT_DEBUG("See ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
356                                          route->src_gateway, src, route->dst_gateway);
357                         char * link_name;
358                         unsigned int i;
359                         xbt_dynar_t link_route_to_test = xbt_dynar_new(global_routing->size_of_link, NULL);
360                         for(i=xbt_dynar_length(route->generic_route.link_list) ;i>0 ;i--)
361                         {
362                                 link_name = xbt_dynar_get_as(route->generic_route.link_list,i-1,void *);
363                                 void *link = xbt_lib_get_or_null(link_lib, link_name, SURF_LINK_LEVEL);
364                                 xbt_assert(link,"Link : '%s' doesn't exists.",link_name);
365                                 xbt_dynar_push(link_route_to_test,&link);
366                         }
367                         xbt_assert(!xbt_dynar_compare(
368                                   (void*)TO_FLOYD_LINK(*dst_id, *src_id)->generic_route.link_list,
369                               (void*)link_route_to_test,
370                                   (int_f_cpvoid_cpvoid_t) surf_pointer_resource_cmp),
371                                   "The route between \"%s\" and \"%s\" already exists", src,dst);
372                 }
373                 else
374                 {
375                         if(route->dst_gateway && route->src_gateway)
376                         {
377                           char *gw_src = xbt_strdup(route->src_gateway);
378                           char *gw_dst = xbt_strdup(route->dst_gateway);
379                           route->src_gateway = gw_dst;
380                           route->dst_gateway = gw_src;
381                         }
382
383                         if(!route->dst_gateway && !route->src_gateway)
384                           XBT_DEBUG("Load Route from \"%s\" to \"%s\"", dst, src);
385                         else
386                           XBT_DEBUG("Load ASroute from \"%s(%s)\" to \"%s(%s)\"", dst,
387                                          route->src_gateway, src, route->dst_gateway);
388
389                     TO_FLOYD_LINK(*dst_id, *src_id) =
390                                 generic_new_extended_route(rc->hierarchy, route, 0);
391                     TO_FLOYD_PRED(*dst_id, *src_id) = *dst_id;
392                     TO_FLOYD_COST(*dst_id, *src_id) =
393                                 ((TO_FLOYD_LINK(*dst_id, *src_id))->generic_route.link_list)->used;   /* count of links, old model assume 1 */
394                 }
395         }
396 }