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.startTime.tv_sec = 0;
 114   time_span.startTime.tv_nsec = 0;
 115   time_span.endTime.tv_sec = 0;
 116   time_span.endTime.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.startTime = s;
 126       time_span.endTime   = e;
 127     }else{
 128       if(s.tv_sec < time_span.startTime.tv_sec
 129           || (s.tv_sec == time_span.startTime.tv_sec
 130                && s.tv_nsec < time_span.startTime.tv_nsec))
 131               time_span.startTime = s;
 132       if(e.tv_sec > time_span.endTime.tv_sec
 133           || (e.tv_sec == time_span.endTime.tv_sec
 134                && e.tv_nsec > time_span.endTime.tv_nsec))
 135         time_span.endTime = 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   /* Get the next event from the pqueue, call its hooks,
 616      reinsert in the pqueue the following event from the same tracefile
 617      unless the tracefile is finished or the event is later than the
 618      end time. */
 619
 620   while(TRUE) {
 621     tfc = NULL;
 622     g_tree_foreach(pqueue, get_first, &tfc);
 623     if(tfc == NULL)
 624     {
 625       self->e = event;
 626       return count;
 627     }
 628
 629     /* Have we reached :
 630      * - the maximum number of events specified?
 631      * - the end position ?
 632      * - the end time ?
 633      * then the read is finished. We leave the queue in the same state and
 634      * break the loop.
 635      */
 636
 637     if(count >= nb_events ||
 638        lttv_traceset_context_ctx_pos_compare(self,
 639                                              end_position) >= 0 ||
 640        ltt_time_compare(tfc->timestamp, end) >= 0)
 641     {
 642       self->e = event;
 643       return count;
 644     }
 645
 646     /* Get the tracefile with an event for the smallest time found. If two
 647        or more tracefiles have events for the same time, hope that lookup
 648        and remove are consistent. */
 649
 650     g_tree_remove(pqueue, tfc);
 651     count++;
 652
 653     id = ltt_event_eventtype_id(tfc->e);
 654     lttv_hooks_call_merge(tfc->event, tfc,
 655                         lttv_hooks_by_id_get(tfc->event_by_id, id), tfc);
 656
 657     event = ltt_tracefile_read(tfc->tf);
 658     if(event != NULL) {
 659       tfc->e = event;
 660       tfc->timestamp = ltt_event_time(event);
 661       if(tfc->timestamp.tv_sec < end.tv_sec ||
 662                   (tfc->timestamp.tv_sec == end.tv_sec &&
 663                 tfc->timestamp.tv_nsec <= end.tv_nsec))
 664               g_tree_insert(pqueue, tfc, tfc);
 665     }
 666   }
 667 }
 668
 669
 670 void lttv_process_traceset_end(LttvTracesetContext *self,
 671                                LttvHooks           *after_traceset,
 672                                LttvHooks           *after_trace,
 673                                LttvHooks           *after_tracefile,
 674                                LttvHooks           *event,
 675                                LttvHooksById       *event_by_id)
 676 {
 677   /* Remove hooks from context. _after hooks are called by remove_hooks. */
 678   /* It calls all after_traceset, after_trace, and after_tracefile hooks. */
 679   lttv_traceset_context_remove_hooks(self,
 680                                      after_traceset,
 681                                      after_trace,
 682                                      after_tracefile,
 683                                      event,
 684                                      event_by_id);
 685 }
 686
 687 void lttv_process_trace_seek_time(LttvTraceContext *self, LttTime start)
 688 {
 689   guint i, nb_tracefile;
 690
 691   LttvTracefileContext *tfc;
 692
 693   LttEvent *event;
 694
 695   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 696       ltt_trace_per_cpu_tracefile_number(self->t);
 697
 698   for(i = 0 ; i < nb_tracefile ; i++) {
 699     tfc = self->tracefiles[i];
 700     ltt_tracefile_seek_time(tfc->tf, start);
 701     event = ltt_tracefile_read(tfc->tf);
 702     tfc->e = event;
 703     if(event != NULL) {
 704       tfc->timestamp = ltt_event_time(event);
 705       g_tree_insert(self->ts_context->pqueue, tfc, tfc);
 706     }
 707   }
 708 }
 709
 710
 711 void lttv_process_traceset_seek_time(LttvTracesetContext *self, LttTime start)
 712 {
 713   guint i, nb_trace;
 714
 715   LttvTraceContext *tc;
 716
 717   LttvTracefileContext *tfc;
 718
 719   /* Empty the pqueue */
 720
 721   while(TRUE){
 722     tfc = NULL;
 723     g_tree_foreach(self->pqueue, get_first, &tfc);
 724     if(tfc == NULL) break;
 725     g_tree_remove(self->pqueue, &(tfc->timestamp));
 726   }
 727
 728   nb_trace = lttv_traceset_number(self->ts);
 729   for(i = 0 ; i < nb_trace ; i++) {
 730     tc = self->traces[i];
 731     lttv_process_trace_seek_time(tc, start);
 732   }
 733 }
 734
 735
 736 gboolean lttv_process_trace_seek_position(LttvTraceContext *self,
 737                                         const LttvTraceContextPosition *pos)
 738 {
 739   guint i, nb_tracefile;
 740
 741   LttvTracefileContext *tfc;
 742
 743   LttEvent *event;
 744
 745   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 746       ltt_trace_per_cpu_tracefile_number(self->t);
 747
 748   if(nb_tracefile != pos->nb_tracefile)
 749     return FALSE; /* Error */
 750
 751   for(i = 0 ; i < nb_tracefile ; i++) {
 752     tfc = self->tracefiles[i];
 753     ltt_tracefile_seek_position(tfc->tf, pos->tf_pos[i]);
 754     event = ltt_tracefile_read(tfc->tf);
 755     tfc->e = event;
 756     if(event != NULL) {
 757       tfc->timestamp = ltt_event_time(event);
 758       g_tree_insert(self->ts_context->pqueue, tfc, tfc);
 759     }
 760   }
 761
 762   return TRUE;
 763 }
 764
 765
 766
 767 gboolean lttv_process_traceset_seek_position(LttvTracesetContext *self,
 768                                         const LttvTracesetContextPosition *pos)
 769 {
 770   guint i, nb_trace;
 771   gboolean sum_ret = TRUE;
 772
 773   LttvTraceContext *tc;
 774
 775   LttvTracefileContext *tfc;
 776
 777   nb_trace = lttv_traceset_number(self->ts);
 778
 779   if(nb_trace != pos->nb_trace)
 780     return FALSE; /* Error */
 781
 782   /* Empty the pqueue */
 783
 784   while(TRUE){
 785     tfc = NULL;
 786     g_tree_foreach(self->pqueue, get_first, &tfc);
 787     if(tfc == NULL) break;
 788     g_tree_remove(self->pqueue, &(tfc->timestamp));
 789   }
 790
 791   for(i = 0 ; i < nb_trace ; i++) {
 792     tc = self->traces[i];
 793     sum_ret = sum_ret && lttv_process_trace_seek_position(tc, &pos->t_pos[i]);
 794   }
 795
 796   return sum_ret;
 797 }
 798
 799
 800
 801 static LttField *
 802 find_field(LttEventType *et, const char *field)
 803 {
 804   LttType *t;
 805
 806   LttField *f;
 807
 808   guint i, nb;
 809
 810   char *name;
 811
 812   if(field == NULL) return NULL;
 813
 814   f = ltt_eventtype_field(et);
 815   t = ltt_eventtype_type(et);
 816   g_assert(ltt_type_class(t) == LTT_STRUCT);
 817   nb = ltt_type_member_number(t);
 818   for(i = 0 ; i < nb ; i++) {
 819     ltt_type_member_type(t, i, &name);
 820     if(strcmp(name, field) == 0) break;
 821   }
 822   g_assert(i < nb);
 823   return ltt_field_member(f, i);
 824 }
 825
 826
 827 void
 828 lttv_trace_find_hook(LttTrace *t, char *facility, char *event_type,
 829     char *field1, char *field2, char *field3, LttvHook h, LttvTraceHook *th)
 830 {
 831   LttFacility *f;
 832
 833   LttEventType *et;
 834
 835   guint nb, pos, i;
 836
 837   char *name;
 838
 839   nb = ltt_trace_facility_find(t, facility, &pos);
 840   if(nb < 1) g_error("No %s facility", facility);
 841   f = ltt_trace_facility_get(t, pos);
 842   et = ltt_facility_eventtype_get_by_name(f, event_type);
 843   if(et == NULL) g_error("Event %s does not exist", event_type);
 844
 845   th->h = h;
 846   th->id = ltt_eventtype_id(et);
 847   th->f1 = find_field(et, field1);
 848   th->f2 = find_field(et, field2);
 849   th->f3 = find_field(et, field3);
 850 }
 851
 852
 853 void lttv_traceset_context_position_save(const LttvTracesetContext *self,
 854                                     LttvTracesetContextPosition *pos)
 855 {
 856   guint nb_trace, nb_tracefile;
 857   guint iter_trace, iter_tracefile;
 858
 859   LttvTraceContext *tc;
 860
 861   LttvTracefileContext *tfc;
 862
 863   LttEvent *event;
 864
 865   pos->nb_trace = nb_trace = lttv_traceset_number(self->ts);
 866   pos->t_pos = g_new(LttvTraceContextPosition, nb_trace);
 867
 868   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 869     tc = self->traces[iter_trace];
 870     pos->t_pos[iter_trace].nb_tracefile = nb_tracefile =
 871                     ltt_trace_control_tracefile_number(tc->t) +
 872                     ltt_trace_per_cpu_tracefile_number(tc->t);
 873
 874     pos->t_pos[iter_trace].tf_pos = g_new(LttEventPosition*, nb_tracefile);
 875     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 876       pos->t_pos[iter_trace].tf_pos[iter_tracefile]
 877                                                 = ltt_event_position_new();
 878       tfc = tc->tracefiles[iter_tracefile];
 879       event = tfc->e;
 880       ltt_event_position(event,
 881                          pos->t_pos[iter_trace].tf_pos[iter_tracefile]);
 882     }
 883   }
 884 }
 885
 886 void lttv_traceset_context_position_destroy(LttvTracesetContextPosition *pos)
 887 {
 888   guint nb_trace, nb_tracefile;
 889   guint iter_trace, iter_tracefile;
 890
 891   nb_trace = pos->nb_trace;
 892
 893   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 894     for(iter_tracefile = 0; iter_tracefile <
 895                         pos->t_pos[iter_trace].nb_tracefile;
 896                         iter_tracefile++) {
 897
 898       g_free(pos->t_pos[iter_trace].tf_pos[iter_tracefile]);
 899     }
 900     g_free(pos->t_pos[iter_trace].tf_pos);
 901   }
 902   g_free(pos->t_pos);
 903
 904 }
 905
 906 gint lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext *self,
 907                                         const LttvTracesetContextPosition *pos)
 908 {
 909   guint nb_trace, nb_tracefile;
 910   guint iter_trace, iter_tracefile;
 911   gint ret;
 912
 913   LttvTraceContext *tc;
 914
 915   LttvTracefileContext *tfc;
 916
 917   LttEvent *event;
 918
 919   nb_trace = lttv_traceset_number(self->ts);
 920
 921   if(pos->nb_trace != nb_trace)
 922     g_error("lttv_traceset_context_ctx_pos_compare : nb_trace does not match.");
 923
 924   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 925     tc = self->traces[iter_trace];
 926     nb_tracefile =  ltt_trace_control_tracefile_number(tc->t) +
 927                     ltt_trace_per_cpu_tracefile_number(tc->t);
 928
 929     if(pos->t_pos[iter_trace].nb_tracefile != nb_tracefile)
 930       g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match.");
 931
 932     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 933       tfc = tc->tracefiles[iter_tracefile];
 934       event = tfc->e;
 935       if(
 936           ret =
 937             ltt_event_event_position_compare(event,
 938                             pos->t_pos[iter_trace].tf_pos[iter_tracefile])
 939           != 0)
 940         return ret;
 941     }
 942   }
 943   return 0;
 944 }
 945
 946
 947 gint lttv_traceset_context_pos_pos_compare(
 948                                   const LttvTracesetContextPosition *pos1,
 949                                   const LttvTracesetContextPosition *pos2)
 950 {
 951   guint nb_trace, nb_tracefile;
 952   guint iter_trace, iter_tracefile;
 953
 954   gint ret;
 955
 956   nb_trace = pos1->nb_trace;
 957   if(nb_trace != pos2->nb_trace)
 958     g_error("lttv_traceset_context_pos_pos_compare : nb_trace does not match.");
 959
 960   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 961
 962     nb_tracefile = pos1->t_pos[iter_trace].nb_tracefile;
 963     if(nb_tracefile != pos2->t_pos[iter_trace].nb_tracefile)
 964       g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match.");
 965
 966     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 967       if(ret =
 968           ltt_event_position_compare(
 969                 pos1->t_pos[iter_trace].tf_pos[iter_tracefile],
 970                 pos2->t_pos[iter_trace].tf_pos[iter_tracefile])
 971           != 0)
 972         return ret;
 973     }
 974   }
 975   return 0;
 976 }
 977
 978