ltt/branches/poly/lttv/lttv/tracecontext.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2003-2004 Michel Dagenais
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation;
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  16  * MA 02111-1307, USA.
  17  */
  18
  19
  20 #include <lttv/tracecontext.h>
  21 #include <ltt/event.h>
  22 #include <ltt/facility.h>
  23 #include <ltt/trace.h>
  24 #include <ltt/type.h>
  25
  26
  27
  28
  29 gint compare_tracefile(gconstpointer a, gconstpointer b)
  30 {
  31   gint comparison;
  32
  33   LttvTracefileContext *trace_a = (LttvTracefileContext *)a;
  34
  35   LttvTracefileContext *trace_b = (LttvTracefileContext *)b;
  36
  37   if(trace_a == trace_b) return 0;
  38   comparison = ltt_time_compare(trace_a->timestamp, trace_b->timestamp);
  39   if(comparison != 0) return comparison;
  40   if(trace_a->index < trace_b->index) return -1;
  41   else if(trace_a->index > trace_b->index) return 1;
  42   if(trace_a->t_context->index < trace_b->t_context->index) return -1;
  43   else if(trace_a->t_context->index > trace_b->t_context->index) return 1;
  44   g_assert(FALSE);
  45 }
  46
  47 struct _LttvTraceContextPosition {
  48   LttEventPosition **tf_pos;          /* Position in each trace           */
  49   guint nb_tracefile;                /* Number of tracefiles (check)     */
  50 };
  51
  52 struct _LttvTracesetContextPosition {
  53   LttvTraceContextPosition *t_pos;    /* Position in each trace           */
  54   guint nb_trace;                    /* Number of traces (check)         */
  55 };
  56
  57 void lttv_context_init(LttvTracesetContext *self, LttvTraceset *ts)
  58 {
  59   LTTV_TRACESET_CONTEXT_GET_CLASS(self)->init(self, ts);
  60 }
  61
  62
  63 void lttv_context_fini(LttvTracesetContext *self)
  64 {
  65   LTTV_TRACESET_CONTEXT_GET_CLASS(self)->fini(self);
  66 }
  67
  68
  69 LttvTracesetContext *
  70 lttv_context_new_traceset_context(LttvTracesetContext *self)
  71 {
  72   return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_traceset_context(self);
  73 }
  74
  75
  76
  77
  78 LttvTraceContext *
  79 lttv_context_new_trace_context(LttvTracesetContext *self)
  80 {
  81   return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_trace_context(self);
  82 }
  83
  84
  85 LttvTracefileContext *
  86 lttv_context_new_tracefile_context(LttvTracesetContext *self)
  87 {
  88   return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_tracefile_context(self);
  89 }
  90
  91 /****************************************************************************
  92  * lttv_traceset_context_compute_time_span
  93  *
  94  * Keep the time span is sync with on the fly addition and removal of traces
  95  * in a trace set. It must be called each time a trace is added/removed from
  96  * the traceset. It could be more efficient to call it only once a bunch
  97  * of traces are loaded, but the calculation is not long, so it's not
  98  * critical.
  99  *
 100  * Author : Xang Xiu Yang
 101  ***************************************************************************/
 102 static void lttv_traceset_context_compute_time_span(
 103                                           LttvTracesetContext *self,
 104                                                                   TimeInterval *time_span)
 105 {
 106   LttvTraceset * traceset = self->ts;
 107   int numTraces = lttv_traceset_number(traceset);
 108   int i;
 109   LttTime s, e;
 110   LttvTraceContext *tc;
 111   LttTrace * trace;
 112
 113   time_span->start_time.tv_sec = 0;
 114   time_span->start_time.tv_nsec = 0;
 115   time_span->end_time.tv_sec = 0;
 116   time_span->end_time.tv_nsec = 0;
 117
 118   for(i=0; i<numTraces;i++){
 119     tc = self->traces[i];
 120     trace = tc->t;
 121
 122     ltt_trace_time_span_get(trace, &s, &e);
 123
 124     if(i==0){
 125       time_span->start_time = s;
 126       time_span->end_time   = e;
 127     }else{
 128       if(s.tv_sec < time_span->start_time.tv_sec
 129           || (s.tv_sec == time_span->start_time.tv_sec
 130                && s.tv_nsec < time_span->start_time.tv_nsec))
 131               time_span->start_time = s;
 132       if(e.tv_sec > time_span->end_time.tv_sec
 133           || (e.tv_sec == time_span->end_time.tv_sec
 134                && e.tv_nsec > time_span->end_time.tv_nsec))
 135         time_span->end_time = e;
 136     }
 137   }
 138 }
 139
 140
 141 static void
 142 init(LttvTracesetContext *self, LttvTraceset *ts)
 143 {
 144   guint i, j, nb_trace, nb_control, nb_per_cpu, nb_tracefile;
 145
 146   LttvTraceContext *tc;
 147
 148   LttvTracefileContext *tfc;
 149
 150   LttTime null_time = {0, 0};
 151
 152   nb_trace = lttv_traceset_number(ts);
 153   self->ts = ts;
 154   self->traces = g_new(LttvTraceContext *, nb_trace);
 155   self->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 156   self->ts_a = lttv_traceset_attribute(ts);
 157   for(i = 0 ; i < nb_trace ; i++) {
 158     tc = LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_trace_context(self);
 159     self->traces[i] = tc;
 160
 161     tc->ts_context = self;
 162     tc->index = i;
 163     tc->vt = lttv_traceset_get(ts, i);
 164     tc->t = lttv_trace(tc->vt);
 165     tc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 166     tc->t_a = lttv_trace_attribute(tc->vt);
 167     nb_control = ltt_trace_control_tracefile_number(tc->t);
 168     nb_per_cpu = ltt_trace_per_cpu_tracefile_number(tc->t);
 169     nb_tracefile = nb_control + nb_per_cpu;
 170     tc->tracefiles = g_new(LttvTracefileContext *, nb_tracefile);
 171
 172     for(j = 0 ; j < nb_tracefile ; j++) {
 173       tfc = LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_tracefile_context(self);
 174       tc->tracefiles[j] = tfc;
 175       tfc->index = j;
 176
 177       if(j < nb_control) {
 178         tfc->control = TRUE;
 179         tfc->tf = ltt_trace_control_tracefile_get(tc->t, j);
 180       }
 181       else {
 182         tfc->control = FALSE;
 183         tfc->tf = ltt_trace_per_cpu_tracefile_get(tc->t, j - nb_control);
 184       }
 185       tfc->t_context = tc;
 186       tfc->event = lttv_hooks_new();
 187       tfc->event_by_id = lttv_hooks_by_id_new();
 188       tfc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 189     }
 190   }
 191   lttv_process_traceset_seek_time(self, null_time);
 192   lttv_traceset_context_compute_time_span(self, &self->time_span);
 193   self->e = NULL;
 194
 195   self->pqueue = g_tree_new(compare_tracefile);
 196 }
 197
 198
 199 void fini(LttvTracesetContext *self)
 200 {
 201   guint i, j, nb_trace, nb_tracefile;
 202
 203   LttvTraceContext *tc;
 204
 205   LttvTracefileContext *tfc;
 206
 207   LttvTraceset *ts = self->ts;
 208
 209   //FIXME : segfault
 210
 211   g_tree_destroy(self->pqueue);
 212   g_object_unref(self->a);
 213
 214   nb_trace = lttv_traceset_number(ts);
 215
 216   for(i = 0 ; i < nb_trace ; i++) {
 217     tc = self->traces[i];
 218
 219     g_object_unref(tc->a);
 220
 221     nb_tracefile = ltt_trace_control_tracefile_number(tc->t) +
 222         ltt_trace_per_cpu_tracefile_number(tc->t);
 223
 224     for(j = 0 ; j < nb_tracefile ; j++) {
 225       tfc = tc->tracefiles[j];
 226       lttv_hooks_destroy(tfc->event);
 227       lttv_hooks_by_id_destroy(tfc->event_by_id);
 228       g_object_unref(tfc->a);
 229       g_object_unref(tfc);
 230     }
 231     g_free(tc->tracefiles);
 232     g_object_unref(tc);
 233   }
 234   g_free(self->traces);
 235 }
 236
 237
 238 void lttv_traceset_context_add_hooks(LttvTracesetContext *self,
 239     LttvHooks *before_traceset,
 240     LttvHooks *before_trace,
 241     LttvHooks *before_tracefile,
 242     LttvHooks *event,
 243     LttvHooksById *event_by_id)
 244 {
 245   LttvTraceset *ts = self->ts;
 246
 247   guint i, nb_trace;
 248
 249   LttvTraceContext *tc;
 250
 251   lttv_hooks_call(before_traceset, self);
 252
 253   nb_trace = lttv_traceset_number(ts);
 254
 255   for(i = 0 ; i < nb_trace ; i++) {
 256     tc = self->traces[i];
 257     lttv_trace_context_add_hooks(tc,
 258                                  before_trace,
 259                                  before_tracefile,
 260                                  event,
 261                                  event_by_id);
 262   }
 263 }
 264
 265
 266 void lttv_traceset_context_remove_hooks(LttvTracesetContext *self,
 267     LttvHooks *after_traceset,
 268     LttvHooks *after_trace,
 269     LttvHooks *after_tracefile,
 270     LttvHooks *event,
 271     LttvHooksById *event_by_id)
 272 {
 273
 274   LttvTraceset *ts = self->ts;
 275
 276   guint i, nb_trace;
 277
 278   LttvTraceContext *tc;
 279
 280   nb_trace = lttv_traceset_number(ts);
 281
 282   for(i = 0 ; i < nb_trace ; i++) {
 283     tc = self->traces[i];
 284     lttv_trace_context_remove_hooks(tc,
 285                                     after_trace,
 286                                     after_tracefile,
 287                                     event,
 288                                     event_by_id);
 289   }
 290
 291   lttv_hooks_call(after_traceset, self);
 292
 293
 294 }
 295
 296 void lttv_trace_context_add_hooks(LttvTraceContext *self,
 297     LttvHooks *before_trace,
 298     LttvHooks *before_tracefile,
 299     LttvHooks *event,
 300     LttvHooksById *event_by_id)
 301 {
 302   guint i, nb_tracefile;
 303
 304   LttvTracefileContext *tfc;
 305
 306   lttv_hooks_call(before_trace, self);
 307   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 308       ltt_trace_per_cpu_tracefile_number(self->t);
 309
 310   for(i = 0 ; i < nb_tracefile ; i++) {
 311     tfc = self->tracefiles[i];
 312     lttv_tracefile_context_add_hooks(tfc,
 313                                      before_tracefile,
 314                                      event,
 315                                      event_by_id);
 316   }
 317 }
 318
 319
 320
 321 void lttv_trace_context_remove_hooks(LttvTraceContext *self,
 322     LttvHooks *after_trace,
 323     LttvHooks *after_tracefile,
 324     LttvHooks *event,
 325     LttvHooksById *event_by_id)
 326 {
 327   guint i, nb_tracefile;
 328
 329   LttvTracefileContext *tfc;
 330
 331   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 332       ltt_trace_per_cpu_tracefile_number(self->t);
 333
 334   for(i = 0 ; i < nb_tracefile ; i++) {
 335     tfc = self->tracefiles[i];
 336     lttv_tracefile_context_remove_hooks(tfc,
 337                                         after_tracefile,
 338                                         event,
 339                                         event_by_id);
 340   }
 341
 342   lttv_hooks_call(after_trace, self);
 343 }
 344
 345 void lttv_tracefile_context_add_hooks(LttvTracefileContext *self,
 346           LttvHooks *before_tracefile,
 347           LttvHooks *event,
 348           LttvHooksById *event_by_id)
 349 {
 350   guint i;
 351
 352   LttvHooks *hook;
 353
 354   lttv_hooks_call(before_tracefile, self);
 355   lttv_hooks_add_list(self->event, event);
 356   if(event_by_id != NULL)
 357     for(i = 0; i < lttv_hooks_by_id_max_id(event_by_id); i++) {
 358       hook = lttv_hooks_by_id_get(self->event_by_id, i);
 359       if(hook != NULL)
 360         lttv_hooks_remove_list(hook, lttv_hooks_by_id_get(event_by_id, i));
 361     }
 362
 363 }
 364
 365 void lttv_tracefile_context_remove_hooks(LttvTracefileContext *self,
 366            LttvHooks *after_tracefile,
 367            LttvHooks *event,
 368            LttvHooksById *event_by_id)
 369 {
 370   guint i;
 371
 372   LttvHooks *hook;
 373
 374
 375   lttv_hooks_remove_list(self->event, event);
 376   if(event_by_id != NULL)
 377     for(i = 0; i < lttv_hooks_by_id_max_id(event_by_id); i++) {
 378       hook = lttv_hooks_by_id_find(self->event_by_id, i);
 379       lttv_hooks_add_list(hook, lttv_hooks_by_id_get(event_by_id, i));
 380     }
 381
 382   lttv_hooks_call(after_tracefile, self);
 383 }
 384
 385
 386
 387 void lttv_tracefile_context_add_hooks_by_id(LttvTracefileContext *tfc,
 388                                             unsigned i,
 389                                             LttvHooks *event_by_id)
 390 {
 391   LttvHooks * h;
 392   h = lttv_hooks_by_id_find(tfc->event_by_id, i);
 393   lttv_hooks_add_list(h, event_by_id);
 394 }
 395
 396 void lttv_tracefile_context_remove_hooks_by_id(LttvTracefileContext *tfc,
 397                                                unsigned i)
 398 {
 399   lttv_hooks_by_id_remove(tfc->event_by_id, i);
 400 }
 401
 402 static LttvTracesetContext *
 403 new_traceset_context(LttvTracesetContext *self)
 404 {
 405   return g_object_new(LTTV_TRACESET_CONTEXT_TYPE, NULL);
 406 }
 407
 408
 409 static LttvTraceContext *
 410 new_trace_context(LttvTracesetContext *self)
 411 {
 412   return g_object_new(LTTV_TRACE_CONTEXT_TYPE, NULL);
 413 }
 414
 415
 416 static LttvTracefileContext *
 417 new_tracefile_context(LttvTracesetContext *self)
 418 {
 419   return g_object_new(LTTV_TRACEFILE_CONTEXT_TYPE, NULL);
 420 }
 421
 422
 423 static void
 424 traceset_context_instance_init (GTypeInstance *instance, gpointer g_class)
 425 {
 426   /* Be careful of anything which would not work well with shallow copies */
 427 }
 428
 429
 430 static void
 431 traceset_context_finalize (LttvTracesetContext *self)
 432 {
 433   G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACESET_CONTEXT_TYPE)))
 434       ->finalize(G_OBJECT(self));
 435 }
 436
 437
 438 static void
 439 traceset_context_class_init (LttvTracesetContextClass *klass)
 440 {
 441   GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 442
 443   gobject_class->finalize = (void (*)(GObject *self))traceset_context_finalize;
 444   klass->init = init;
 445   klass->fini = fini;
 446   klass->new_traceset_context = new_traceset_context;
 447   klass->new_trace_context = new_trace_context;
 448   klass->new_tracefile_context = new_tracefile_context;
 449 }
 450
 451
 452 GType
 453 lttv_traceset_context_get_type(void)
 454 {
 455   static GType type = 0;
 456   if (type == 0) {
 457     static const GTypeInfo info = {
 458       sizeof (LttvTracesetContextClass),
 459       NULL,   /* base_init */
 460       NULL,   /* base_finalize */
 461       (GClassInitFunc) traceset_context_class_init,   /* class_init */
 462       NULL,   /* class_finalize */
 463       NULL,   /* class_data */
 464       sizeof (LttvTracesetContext),
 465       0,      /* n_preallocs */
 466       (GInstanceInitFunc) traceset_context_instance_init /* instance_init */
 467     };
 468
 469     type = g_type_register_static (G_TYPE_OBJECT, "LttvTracesetContextType",
 470         &info, 0);
 471   }
 472   return type;
 473 }
 474
 475
 476 static void
 477 trace_context_instance_init (GTypeInstance *instance, gpointer g_class)
 478 {
 479   /* Be careful of anything which would not work well with shallow copies */
 480 }
 481
 482
 483 static void
 484 trace_context_finalize (LttvTraceContext *self)
 485 {
 486   G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACE_CONTEXT_TYPE)))->
 487       finalize(G_OBJECT(self));
 488 }
 489
 490
 491 static void
 492 trace_context_class_init (LttvTraceContextClass *klass)
 493 {
 494   GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 495
 496   gobject_class->finalize = (void (*)(GObject *self)) trace_context_finalize;
 497 }
 498
 499
 500 GType
 501 lttv_trace_context_get_type(void)
 502 {
 503   static GType type = 0;
 504   if (type == 0) {
 505     static const GTypeInfo info = {
 506       sizeof (LttvTraceContextClass),
 507       NULL,   /* base_init */
 508       NULL,   /* base_finalize */
 509       (GClassInitFunc) trace_context_class_init,   /* class_init */
 510       NULL,   /* class_finalize */
 511       NULL,   /* class_data */
 512       sizeof (LttvTraceContext),
 513       0,      /* n_preallocs */
 514       (GInstanceInitFunc) trace_context_instance_init    /* instance_init */
 515     };
 516
 517     type = g_type_register_static (G_TYPE_OBJECT, "LttvTraceContextType",
 518         &info, 0);
 519   }
 520   return type;
 521 }
 522
 523
 524 static void
 525 tracefile_context_instance_init (GTypeInstance *instance, gpointer g_class)
 526 {
 527   /* Be careful of anything which would not work well with shallow copies */
 528 }
 529
 530
 531 static void
 532 tracefile_context_finalize (LttvTracefileContext *self)
 533 {
 534   G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACEFILE_CONTEXT_TYPE)))
 535       ->finalize(G_OBJECT(self));
 536 }
 537
 538
 539 static void
 540 tracefile_context_class_init (LttvTracefileContextClass *klass)
 541 {
 542   GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 543
 544   gobject_class->finalize = (void (*)(GObject *self))tracefile_context_finalize;
 545 }
 546
 547
 548 GType
 549 lttv_tracefile_context_get_type(void)
 550 {
 551   static GType type = 0;
 552   if (type == 0) {
 553     static const GTypeInfo info = {
 554       sizeof (LttvTracefileContextClass),
 555       NULL,   /* base_init */
 556       NULL,   /* base_finalize */
 557       (GClassInitFunc) tracefile_context_class_init,   /* class_init */
 558       NULL,   /* class_finalize */
 559       NULL,   /* class_data */
 560       sizeof (LttvTracefileContext),
 561       0,      /* n_preallocs */
 562       (GInstanceInitFunc) tracefile_context_instance_init    /* instance_init */
 563     };
 564
 565     type = g_type_register_static (G_TYPE_OBJECT, "LttvTracefileContextType",
 566         &info, 0);
 567   }
 568   return type;
 569 }
 570
 571
 572
 573 gboolean get_first(gpointer key, gpointer value, gpointer user_data) {
 574   *((LttvTracefileContext **)user_data) = (LttvTracefileContext *)value;
 575   return TRUE;
 576 }
 577
 578
 579
 580 void lttv_process_traceset_begin(LttvTracesetContext *self,
 581                                  LttvHooks       *before_traceset,
 582                                  LttvHooks       *before_trace,
 583                                  LttvHooks       *before_tracefile,
 584                                  LttvHooks       *event,
 585                                  LttvHooksById   *event_by_id)
 586 {
 587
 588   /* simply add hooks in context. _before hooks are called by add_hooks. */
 589   /* It calls all before_traceset, before_trace, and before_tracefile hooks. */
 590   lttv_traceset_context_add_hooks(self,
 591                                   before_traceset,
 592                                   before_trace,
 593                                   before_tracefile,
 594                                   event,
 595                                   event_by_id);
 596
 597 }
 598
 599 /* Note : a _middle must be preceded from a _seek or another middle */
 600 guint lttv_process_traceset_middle(LttvTracesetContext *self,
 601                               LttTime end,
 602                               unsigned nb_events,
 603                               const LttvTracesetContextPosition *end_position)
 604 {
 605   GTree *pqueue = self->pqueue;
 606
 607   guint id;
 608
 609   LttvTracefileContext *tfc;
 610
 611   LttEvent *event;
 612
 613   unsigned count = 0;
 614
 615   gboolean last_ret = FALSE; /* return value of the last hook list called */
 616
 617   /* Get the next event from the pqueue, call its hooks,
 618      reinsert in the pqueue the following event from the same tracefile
 619      unless the tracefile is finished or the event is later than the
 620      end time. */
 621
 622   while(TRUE) {
 623     tfc = NULL;
 624     g_tree_foreach(pqueue, get_first, &tfc);
 625     /* End of traceset : tfc is NULL */
 626     if(tfc == NULL)
 627     {
 628       self->e = event;
 629       return count;
 630     }
 631
 632     /* Have we reached :
 633      * - the maximum number of events specified?
 634      * - the end position ?
 635      * - the end time ?
 636      * then the read is finished. We leave the queue in the same state and
 637      * break the loop.
 638      */
 639
 640     if(last_ret == TRUE ||
 641        count >= nb_events ||
 642        lttv_traceset_context_ctx_pos_compare(self,
 643                                              end_position) >= 0 ||
 644        ltt_time_compare(tfc->timestamp, end) >= 0)
 645     {
 646       self->e = event;
 647       return count;
 648     }
 649
 650     /* Get the tracefile with an event for the smallest time found. If two
 651        or more tracefiles have events for the same time, hope that lookup
 652        and remove are consistent. */
 653
 654     g_tree_remove(pqueue, tfc);
 655     count++;
 656
 657     id = ltt_event_eventtype_id(tfc->e);
 658     last_ret = lttv_hooks_call_merge(tfc->event, tfc,
 659                         lttv_hooks_by_id_get(tfc->event_by_id, id), tfc);
 660
 661     event = ltt_tracefile_read(tfc->tf);
 662     if(event != NULL) {
 663       tfc->e = event;
 664       tfc->timestamp = ltt_event_time(event);
 665             g_tree_insert(pqueue, tfc, tfc);
 666     }
 667   }
 668 }
 669
 670
 671 void lttv_process_traceset_end(LttvTracesetContext *self,
 672                                LttvHooks           *after_traceset,
 673                                LttvHooks           *after_trace,
 674                                LttvHooks           *after_tracefile,
 675                                LttvHooks           *event,
 676                                LttvHooksById       *event_by_id)
 677 {
 678   /* Remove hooks from context. _after hooks are called by remove_hooks. */
 679   /* It calls all after_traceset, after_trace, and after_tracefile hooks. */
 680   lttv_traceset_context_remove_hooks(self,
 681                                      after_traceset,
 682                                      after_trace,
 683                                      after_tracefile,
 684                                      event,
 685                                      event_by_id);
 686 }
 687
 688 void lttv_process_trace_seek_time(LttvTraceContext *self, LttTime start)
 689 {
 690   guint i, nb_tracefile;
 691
 692   LttvTracefileContext *tfc;
 693
 694   LttEvent *event;
 695
 696   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 697       ltt_trace_per_cpu_tracefile_number(self->t);
 698
 699   for(i = 0 ; i < nb_tracefile ; i++) {
 700     tfc = self->tracefiles[i];
 701     ltt_tracefile_seek_time(tfc->tf, start);
 702     event = ltt_tracefile_read(tfc->tf);
 703     tfc->e = event;
 704     if(event != NULL) {
 705       tfc->timestamp = ltt_event_time(event);
 706       g_tree_insert(self->ts_context->pqueue, tfc, tfc);
 707     }
 708   }
 709 }
 710
 711
 712 void lttv_process_traceset_seek_time(LttvTracesetContext *self, LttTime start)
 713 {
 714   guint i, nb_trace;
 715
 716   LttvTraceContext *tc;
 717
 718   LttvTracefileContext *tfc;
 719
 720   /* Empty the pqueue */
 721
 722   while(TRUE){
 723     tfc = NULL;
 724     g_tree_foreach(self->pqueue, get_first, &tfc);
 725     if(tfc == NULL) break;
 726     g_tree_remove(self->pqueue, &(tfc->timestamp));
 727   }
 728
 729   nb_trace = lttv_traceset_number(self->ts);
 730   for(i = 0 ; i < nb_trace ; i++) {
 731     tc = self->traces[i];
 732     lttv_process_trace_seek_time(tc, start);
 733   }
 734 }
 735
 736
 737 gboolean lttv_process_trace_seek_position(LttvTraceContext *self,
 738                                         const LttvTraceContextPosition *pos)
 739 {
 740   guint i, nb_tracefile;
 741
 742   LttvTracefileContext *tfc;
 743
 744   LttEvent *event;
 745
 746   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 747       ltt_trace_per_cpu_tracefile_number(self->t);
 748
 749   if(nb_tracefile != pos->nb_tracefile)
 750     return FALSE; /* Error */
 751
 752   for(i = 0 ; i < nb_tracefile ; i++) {
 753     tfc = self->tracefiles[i];
 754     ltt_tracefile_seek_position(tfc->tf, pos->tf_pos[i]);
 755     event = ltt_tracefile_read(tfc->tf);
 756     tfc->e = event;
 757     if(event != NULL) {
 758       tfc->timestamp = ltt_event_time(event);
 759       g_tree_insert(self->ts_context->pqueue, tfc, tfc);
 760     }
 761   }
 762
 763   return TRUE;
 764 }
 765
 766
 767
 768 gboolean lttv_process_traceset_seek_position(LttvTracesetContext *self,
 769                                         const LttvTracesetContextPosition *pos)
 770 {
 771   guint i, nb_trace;
 772   gboolean sum_ret = TRUE;
 773
 774   LttvTraceContext *tc;
 775
 776   LttvTracefileContext *tfc;
 777
 778   nb_trace = lttv_traceset_number(self->ts);
 779
 780   if(nb_trace != pos->nb_trace)
 781     return FALSE; /* Error */
 782
 783   /* Empty the pqueue */
 784
 785   while(TRUE){
 786     tfc = NULL;
 787     g_tree_foreach(self->pqueue, get_first, &tfc);
 788     if(tfc == NULL) break;
 789     g_tree_remove(self->pqueue, &(tfc->timestamp));
 790   }
 791
 792   for(i = 0 ; i < nb_trace ; i++) {
 793     tc = self->traces[i];
 794     sum_ret = sum_ret && lttv_process_trace_seek_position(tc, &pos->t_pos[i]);
 795   }
 796
 797   return sum_ret;
 798 }
 799
 800
 801
 802 static LttField *
 803 find_field(LttEventType *et, const char *field)
 804 {
 805   LttType *t;
 806
 807   LttField *f;
 808
 809   guint i, nb;
 810
 811   char *name;
 812
 813   if(field == NULL) return NULL;
 814
 815   f = ltt_eventtype_field(et);
 816   t = ltt_eventtype_type(et);
 817   g_assert(ltt_type_class(t) == LTT_STRUCT);
 818   nb = ltt_type_member_number(t);
 819   for(i = 0 ; i < nb ; i++) {
 820     ltt_type_member_type(t, i, &name);
 821     if(strcmp(name, field) == 0) break;
 822   }
 823   g_assert(i < nb);
 824   return ltt_field_member(f, i);
 825 }
 826
 827
 828 void
 829 lttv_trace_find_hook(LttTrace *t, char *facility, char *event_type,
 830     char *field1, char *field2, char *field3, LttvHook h, LttvTraceHook *th)
 831 {
 832   LttFacility *f;
 833
 834   LttEventType *et;
 835
 836   guint nb, pos, i;
 837
 838   char *name;
 839
 840   nb = ltt_trace_facility_find(t, facility, &pos);
 841   if(nb < 1) g_error("No %s facility", facility);
 842   f = ltt_trace_facility_get(t, pos);
 843   et = ltt_facility_eventtype_get_by_name(f, event_type);
 844   if(et == NULL) g_error("Event %s does not exist", event_type);
 845
 846   th->h = h;
 847   th->id = ltt_eventtype_id(et);
 848   th->f1 = find_field(et, field1);
 849   th->f2 = find_field(et, field2);
 850   th->f3 = find_field(et, field3);
 851 }
 852
 853
 854 void lttv_traceset_context_position_save(const LttvTracesetContext *self,
 855                                     LttvTracesetContextPosition *pos)
 856 {
 857   guint nb_trace, nb_tracefile;
 858   guint iter_trace, iter_tracefile;
 859
 860   LttvTraceContext *tc;
 861
 862   LttvTracefileContext *tfc;
 863
 864   LttEvent *event;
 865
 866   pos->nb_trace = nb_trace = lttv_traceset_number(self->ts);
 867   pos->t_pos = g_new(LttvTraceContextPosition, nb_trace);
 868
 869   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 870     tc = self->traces[iter_trace];
 871     pos->t_pos[iter_trace].nb_tracefile = nb_tracefile =
 872                     ltt_trace_control_tracefile_number(tc->t) +
 873                     ltt_trace_per_cpu_tracefile_number(tc->t);
 874
 875     pos->t_pos[iter_trace].tf_pos = g_new(LttEventPosition*, nb_tracefile);
 876     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 877       pos->t_pos[iter_trace].tf_pos[iter_tracefile]
 878                                                 = ltt_event_position_new();
 879       tfc = tc->tracefiles[iter_tracefile];
 880       event = tfc->e;
 881       ltt_event_position(event,
 882                          pos->t_pos[iter_trace].tf_pos[iter_tracefile]);
 883     }
 884   }
 885 }
 886
 887 void lttv_traceset_context_position_destroy(LttvTracesetContextPosition *pos)
 888 {
 889   guint nb_trace, nb_tracefile;
 890   guint iter_trace, iter_tracefile;
 891
 892   nb_trace = pos->nb_trace;
 893
 894   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 895     for(iter_tracefile = 0; iter_tracefile <
 896                         pos->t_pos[iter_trace].nb_tracefile;
 897                         iter_tracefile++) {
 898
 899       g_free(pos->t_pos[iter_trace].tf_pos[iter_tracefile]);
 900     }
 901     g_free(pos->t_pos[iter_trace].tf_pos);
 902   }
 903   g_free(pos->t_pos);
 904
 905 }
 906
 907 gint lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext *self,
 908                                         const LttvTracesetContextPosition *pos)
 909 {
 910   guint nb_trace, nb_tracefile;
 911   guint iter_trace, iter_tracefile;
 912   gint ret;
 913
 914   LttvTraceContext *tc;
 915
 916   LttvTracefileContext *tfc;
 917
 918   LttEvent *event;
 919
 920   nb_trace = lttv_traceset_number(self->ts);
 921
 922   if(pos->nb_trace != nb_trace)
 923     g_error("lttv_traceset_context_ctx_pos_compare : nb_trace does not match.");
 924
 925   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 926     tc = self->traces[iter_trace];
 927     nb_tracefile =  ltt_trace_control_tracefile_number(tc->t) +
 928                     ltt_trace_per_cpu_tracefile_number(tc->t);
 929
 930     if(pos->t_pos[iter_trace].nb_tracefile != nb_tracefile)
 931       g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match.");
 932
 933     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 934       tfc = tc->tracefiles[iter_tracefile];
 935       event = tfc->e;
 936       if(
 937           ret =
 938             ltt_event_event_position_compare(event,
 939                             pos->t_pos[iter_trace].tf_pos[iter_tracefile])
 940           != 0)
 941         return ret;
 942     }
 943   }
 944   return 0;
 945 }
 946
 947
 948 gint lttv_traceset_context_pos_pos_compare(
 949                                   const LttvTracesetContextPosition *pos1,
 950                                   const LttvTracesetContextPosition *pos2)
 951 {
 952   guint nb_trace, nb_tracefile;
 953   guint iter_trace, iter_tracefile;
 954
 955   gint ret;
 956
 957   nb_trace = pos1->nb_trace;
 958   if(nb_trace != pos2->nb_trace)
 959     g_error("lttv_traceset_context_pos_pos_compare : nb_trace does not match.");
 960
 961   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 962
 963     nb_tracefile = pos1->t_pos[iter_trace].nb_tracefile;
 964     if(nb_tracefile != pos2->t_pos[iter_trace].nb_tracefile)
 965       g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match.");
 966
 967     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 968       if(ret =
 969           ltt_event_position_compare(
 970                 pos1->t_pos[iter_trace].tf_pos[iter_tracefile],
 971                 pos2->t_pos[iter_trace].tf_pos[iter_tracefile])
 972           != 0)
 973         return ret;
 974     }
 975   }
 976   return 0;
 977 }
 978
 979