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 tracefile       */
  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   LttTime timestamp;                 /* Current time at the saved position */
  56 };
  57
  58 void lttv_context_init(LttvTracesetContext *self, LttvTraceset *ts)
  59 {
  60   LTTV_TRACESET_CONTEXT_GET_CLASS(self)->init(self, ts);
  61 }
  62
  63
  64 void lttv_context_fini(LttvTracesetContext *self)
  65 {
  66   LTTV_TRACESET_CONTEXT_GET_CLASS(self)->fini(self);
  67 }
  68
  69
  70 LttvTracesetContext *
  71 lttv_context_new_traceset_context(LttvTracesetContext *self)
  72 {
  73   return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_traceset_context(self);
  74 }
  75
  76
  77
  78
  79 LttvTraceContext *
  80 lttv_context_new_trace_context(LttvTracesetContext *self)
  81 {
  82   return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_trace_context(self);
  83 }
  84
  85
  86 LttvTracefileContext *
  87 lttv_context_new_tracefile_context(LttvTracesetContext *self)
  88 {
  89   return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_tracefile_context(self);
  90 }
  91
  92 /****************************************************************************
  93  * lttv_traceset_context_compute_time_span
  94  *
  95  * Keep the time span is sync with on the fly addition and removal of traces
  96  * in a trace set. It must be called each time a trace is added/removed from
  97  * the traceset. It could be more efficient to call it only once a bunch
  98  * of traces are loaded, but the calculation is not long, so it's not
  99  * critical.
 100  *
 101  * Author : Xang Xiu Yang
 102  ***************************************************************************/
 103 static void lttv_traceset_context_compute_time_span(
 104                                           LttvTracesetContext *self,
 105                                                                   TimeInterval *time_span)
 106 {
 107   LttvTraceset * traceset = self->ts;
 108   int numTraces = lttv_traceset_number(traceset);
 109   int i;
 110   LttTime s, e;
 111   LttvTraceContext *tc;
 112   LttTrace * trace;
 113
 114   time_span->start_time.tv_sec = 0;
 115   time_span->start_time.tv_nsec = 0;
 116   time_span->end_time.tv_sec = 0;
 117   time_span->end_time.tv_nsec = 0;
 118
 119   for(i=0; i<numTraces;i++){
 120     tc = self->traces[i];
 121     trace = tc->t;
 122
 123     ltt_trace_time_span_get(trace, &s, &e);
 124
 125     if(i==0){
 126       time_span->start_time = s;
 127       time_span->end_time   = e;
 128     }else{
 129       if(s.tv_sec < time_span->start_time.tv_sec
 130           || (s.tv_sec == time_span->start_time.tv_sec
 131                && s.tv_nsec < time_span->start_time.tv_nsec))
 132               time_span->start_time = s;
 133       if(e.tv_sec > time_span->end_time.tv_sec
 134           || (e.tv_sec == time_span->end_time.tv_sec
 135                && e.tv_nsec > time_span->end_time.tv_nsec))
 136         time_span->end_time = e;
 137     }
 138   }
 139 }
 140
 141
 142 static void
 143 init(LttvTracesetContext *self, LttvTraceset *ts)
 144 {
 145   guint i, j, nb_trace, nb_control, nb_per_cpu, nb_tracefile;
 146
 147   LttvTraceContext *tc;
 148
 149   LttvTracefileContext *tfc;
 150
 151   LttTime null_time = {0, 0};
 152
 153   nb_trace = lttv_traceset_number(ts);
 154   self->ts = ts;
 155   self->traces = g_new(LttvTraceContext *, nb_trace);
 156   self->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 157   self->ts_a = lttv_traceset_attribute(ts);
 158   for(i = 0 ; i < nb_trace ; i++) {
 159     tc = LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_trace_context(self);
 160     self->traces[i] = tc;
 161
 162     tc->ts_context = self;
 163     tc->index = i;
 164     tc->vt = lttv_traceset_get(ts, i);
 165     tc->t = lttv_trace(tc->vt);
 166     tc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 167     tc->t_a = lttv_trace_attribute(tc->vt);
 168     nb_control = ltt_trace_control_tracefile_number(tc->t);
 169     nb_per_cpu = ltt_trace_per_cpu_tracefile_number(tc->t);
 170     nb_tracefile = nb_control + nb_per_cpu;
 171     tc->tracefiles = g_new(LttvTracefileContext *, nb_tracefile);
 172
 173     for(j = 0 ; j < nb_tracefile ; j++) {
 174       tfc = LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_tracefile_context(self);
 175       tc->tracefiles[j] = tfc;
 176       tfc->index = j;
 177
 178       if(j < nb_control) {
 179         tfc->control = TRUE;
 180         tfc->tf = ltt_trace_control_tracefile_get(tc->t, j);
 181       }
 182       else {
 183         tfc->control = FALSE;
 184         tfc->tf = ltt_trace_per_cpu_tracefile_get(tc->t, j - nb_control);
 185       }
 186       tfc->t_context = tc;
 187       tfc->event = lttv_hooks_new();
 188       tfc->event_by_id = lttv_hooks_by_id_new();
 189       tfc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 190     }
 191   }
 192   self->pqueue = g_tree_new(compare_tracefile);
 193   lttv_process_traceset_seek_time(self, null_time);
 194   lttv_traceset_context_compute_time_span(self, &self->time_span);
 195
 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                               guint 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       return count;
 629     }
 630
 631     /* Have we reached :
 632      * - the maximum number of events specified?
 633      * - the end position ?
 634      * - the end time ?
 635      * then the read is finished. We leave the queue in the same state and
 636      * break the loop.
 637      */
 638
 639     if(last_ret == TRUE ||
 640        count >= nb_events ||
 641        (end_position!=NULL)?FALSE:lttv_traceset_context_ctx_pos_compare(self,
 642                                                            end_position) >= 0 ||
 643        ltt_time_compare(tfc->timestamp, end) >= 0)
 644     {
 645       return count;
 646     }
 647
 648     /* Get the tracefile with an event for the smallest time found. If two
 649        or more tracefiles have events for the same time, hope that lookup
 650        and remove are consistent. */
 651
 652     g_tree_remove(pqueue, tfc);
 653     count++;
 654
 655     id = ltt_event_eventtype_id(tfc->e);
 656     last_ret = lttv_hooks_call_merge(tfc->event, tfc,
 657                         lttv_hooks_by_id_get(tfc->event_by_id, id), tfc);
 658
 659     event = ltt_tracefile_read(tfc->tf);
 660     if(event != NULL) {
 661       tfc->e = event;
 662       tfc->timestamp = ltt_event_time(event);
 663             g_tree_insert(pqueue, tfc, tfc);
 664     }
 665   }
 666 }
 667
 668
 669 void lttv_process_traceset_end(LttvTracesetContext *self,
 670                                LttvHooks           *after_traceset,
 671                                LttvHooks           *after_trace,
 672                                LttvHooks           *after_tracefile,
 673                                LttvHooks           *event,
 674                                LttvHooksById       *event_by_id)
 675 {
 676   /* Remove hooks from context. _after hooks are called by remove_hooks. */
 677   /* It calls all after_traceset, after_trace, and after_tracefile hooks. */
 678   lttv_traceset_context_remove_hooks(self,
 679                                      after_traceset,
 680                                      after_trace,
 681                                      after_tracefile,
 682                                      event,
 683                                      event_by_id);
 684 }
 685
 686 void lttv_process_trace_seek_time(LttvTraceContext *self, LttTime start)
 687 {
 688   guint i, nb_tracefile;
 689
 690   LttvTracefileContext *tfc;
 691
 692   LttEvent *event;
 693
 694   GTree *pqueue = self->ts_context->pqueue;
 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     g_tree_remove(pqueue, tfc);
 703     event = ltt_tracefile_read(tfc->tf);
 704     tfc->e = event;
 705     if(event != NULL) {
 706       tfc->timestamp = ltt_event_time(event);
 707       g_tree_insert(pqueue, tfc, tfc);
 708     }
 709   }
 710 }
 711
 712
 713 void lttv_process_traceset_seek_time(LttvTracesetContext *self, LttTime start)
 714 {
 715   guint i, nb_trace;
 716
 717   LttvTraceContext *tc;
 718
 719   LttvTracefileContext *tfc;
 720
 721   nb_trace = lttv_traceset_number(self->ts);
 722   for(i = 0 ; i < nb_trace ; i++) {
 723     tc = self->traces[i];
 724     lttv_process_trace_seek_time(tc, start);
 725   }
 726 }
 727
 728
 729 gboolean lttv_process_tracefile_seek_position(LttvTracefileContext *self,
 730                                               const LttEventPosition *pos)
 731 {
 732   LttvTracefileContext *tfc = self;
 733
 734   LttEvent *event;
 735
 736   GTree *pqueue = self->t_context->ts_context->pqueue;
 737
 738   ltt_tracefile_seek_position(tfc->tf, pos);
 739   g_tree_remove(pqueue, tfc);
 740   event = ltt_tracefile_read(tfc->tf);
 741   tfc->e = event;
 742   if(event != NULL) {
 743     tfc->timestamp = ltt_event_time(event);
 744     g_tree_insert(pqueue, tfc, tfc);
 745   }
 746
 747
 748 }
 749
 750 gboolean lttv_process_trace_seek_position(LttvTraceContext *self,
 751                                         const LttvTraceContextPosition *pos)
 752 {
 753   guint i, nb_tracefile;
 754
 755   LttvTracefileContext *tfc;
 756
 757   LttEvent *event;
 758
 759   nb_tracefile = ltt_trace_control_tracefile_number(self->t) +
 760       ltt_trace_per_cpu_tracefile_number(self->t);
 761
 762   if(nb_tracefile != pos->nb_tracefile)
 763     return FALSE; /* Error */
 764
 765   for(i = 0 ; i < nb_tracefile ; i++) {
 766     tfc = self->tracefiles[i];
 767     lttv_process_tracefile_seek_position(tfc, pos->tf_pos[i]);
 768   }
 769
 770   return TRUE;
 771 }
 772
 773
 774
 775 gboolean lttv_process_traceset_seek_position(LttvTracesetContext *self,
 776                                         const LttvTracesetContextPosition *pos)
 777 {
 778   guint i, nb_trace;
 779   gboolean sum_ret = TRUE;
 780
 781   LttvTraceContext *tc;
 782
 783   LttvTracefileContext *tfc;
 784
 785   nb_trace = lttv_traceset_number(self->ts);
 786
 787   if(nb_trace != pos->nb_trace)
 788     return FALSE; /* Error */
 789
 790   for(i = 0 ; i < nb_trace ; i++) {
 791     tc = self->traces[i];
 792     sum_ret = sum_ret && lttv_process_trace_seek_position(tc, &pos->t_pos[i]);
 793   }
 794
 795   return sum_ret;
 796 }
 797
 798
 799
 800 static LttField *
 801 find_field(LttEventType *et, const char *field)
 802 {
 803   LttType *t;
 804
 805   LttField *f;
 806
 807   guint i, nb;
 808
 809   char *name;
 810
 811   if(field == NULL) return NULL;
 812
 813   f = ltt_eventtype_field(et);
 814   t = ltt_eventtype_type(et);
 815   g_assert(ltt_type_class(t) == LTT_STRUCT);
 816   nb = ltt_type_member_number(t);
 817   for(i = 0 ; i < nb ; i++) {
 818     ltt_type_member_type(t, i, &name);
 819     if(strcmp(name, field) == 0) break;
 820   }
 821   g_assert(i < nb);
 822   return ltt_field_member(f, i);
 823 }
 824
 825
 826 void
 827 lttv_trace_find_hook(LttTrace *t, char *facility, char *event_type,
 828     char *field1, char *field2, char *field3, LttvHook h, LttvTraceHook *th)
 829 {
 830   LttFacility *f;
 831
 832   LttEventType *et;
 833
 834   guint nb, pos, i;
 835
 836   char *name;
 837
 838   nb = ltt_trace_facility_find(t, facility, &pos);
 839   if(nb < 1) g_error("No %s facility", facility);
 840   f = ltt_trace_facility_get(t, pos);
 841   et = ltt_facility_eventtype_get_by_name(f, event_type);
 842   if(et == NULL) g_error("Event %s does not exist", event_type);
 843
 844   th->h = h;
 845   th->id = ltt_eventtype_id(et);
 846   th->f1 = find_field(et, field1);
 847   th->f2 = find_field(et, field2);
 848   th->f3 = find_field(et, field3);
 849 }
 850
 851
 852 void lttv_traceset_context_position_save(const LttvTracesetContext *self,
 853                                     LttvTracesetContextPosition *pos)
 854 {
 855   guint nb_trace, nb_tracefile;
 856   guint iter_trace, iter_tracefile;
 857
 858   LttvTraceContext *tc;
 859
 860   LttvTracefileContext *tfc;
 861
 862   LttEvent *event;
 863
 864   LttTime timestamp = self->time_span.end_time;
 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       if(ltt_time_compare(tfc->timestamp, timestamp) < 0)
 884         timestamp = tfc->timestamp;
 885     }
 886   }
 887   pos->timestamp = timestamp;
 888 }
 889
 890 void lttv_traceset_context_position_destroy(LttvTracesetContextPosition *pos)
 891 {
 892   guint nb_trace, nb_tracefile;
 893   guint iter_trace, iter_tracefile;
 894
 895   nb_trace = pos->nb_trace;
 896
 897   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 898     for(iter_tracefile = 0; iter_tracefile <
 899                         pos->t_pos[iter_trace].nb_tracefile;
 900                         iter_tracefile++) {
 901
 902       g_free(pos->t_pos[iter_trace].tf_pos[iter_tracefile]);
 903     }
 904     g_free(pos->t_pos[iter_trace].tf_pos);
 905   }
 906   g_free(pos->t_pos);
 907
 908 }
 909
 910 gint lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext *self,
 911                                         const LttvTracesetContextPosition *pos)
 912 {
 913   guint nb_trace, nb_tracefile;
 914   guint iter_trace, iter_tracefile;
 915   gint ret;
 916
 917   LttvTraceContext *tc;
 918
 919   LttvTracefileContext *tfc;
 920
 921   LttEvent *event;
 922
 923   nb_trace = lttv_traceset_number(self->ts);
 924
 925   if(pos->nb_trace != nb_trace)
 926     g_error("lttv_traceset_context_ctx_pos_compare : nb_trace does not match.");
 927
 928   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 929     tc = self->traces[iter_trace];
 930     nb_tracefile =  ltt_trace_control_tracefile_number(tc->t) +
 931                     ltt_trace_per_cpu_tracefile_number(tc->t);
 932
 933     if(pos->t_pos[iter_trace].nb_tracefile != nb_tracefile)
 934       g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match.");
 935
 936     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 937       tfc = tc->tracefiles[iter_tracefile];
 938       event = tfc->e;
 939       if(
 940           ret =
 941             ltt_event_event_position_compare(event,
 942                             pos->t_pos[iter_trace].tf_pos[iter_tracefile])
 943           != 0)
 944         return ret;
 945     }
 946   }
 947   return 0;
 948 }
 949
 950
 951 gint lttv_traceset_context_pos_pos_compare(
 952                                   const LttvTracesetContextPosition *pos1,
 953                                   const LttvTracesetContextPosition *pos2)
 954 {
 955   guint nb_trace, nb_tracefile;
 956   guint iter_trace, iter_tracefile;
 957
 958   gint ret;
 959
 960   nb_trace = pos1->nb_trace;
 961   if(nb_trace != pos2->nb_trace)
 962     g_error("lttv_traceset_context_pos_pos_compare : nb_trace does not match.");
 963
 964   for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) {
 965
 966     nb_tracefile = pos1->t_pos[iter_trace].nb_tracefile;
 967     if(nb_tracefile != pos2->t_pos[iter_trace].nb_tracefile)
 968       g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match.");
 969
 970     for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) {
 971       if(ret =
 972           ltt_event_position_compare(
 973                 pos1->t_pos[iter_trace].tf_pos[iter_tracefile],
 974                 pos2->t_pos[iter_trace].tf_pos[iter_tracefile])
 975           != 0)
 976         return ret;
 977     }
 978   }
 979   return 0;
 980 }
 981
 982
 983 LttTime lttv_traceset_context_position_get_time(
 984                                   const LttvTracesetContextPosition *pos)
 985 {
 986   return pos->timestamp;
 987 }
 988
 989
 990 LttvTracefileContext *lttv_traceset_context_get_current_tfc(LttvTracesetContext *self)
 991 {
 992   GTree *pqueue = self->pqueue;
 993   LttvTracefileContext *tfc;
 994
 995   g_tree_foreach(pqueue, get_first, &tfc);
 996
 997   return tfc;
 998 }