lttv/lttv/traceset.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 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include <lttv/traceset.h>
  24 #include <lttv/iattribute.h>
  25 #include <lttv/state.h>
  26 #include <lttv/event.h>
  27 #include <lttv/hook.h>
  28 #include <stdio.h>
  29 #include <babeltrace/babeltrace.h>
  30 #include <babeltrace/context.h>
  31 #include <babeltrace/ctf/iterator.h>
  32 #include <babeltrace/ctf/events.h>
  33
  34 /* To traverse a tree recursively */
  35 #include <fcntl.h>
  36 #include <fts.h>
  37 /* For the use of realpath*/
  38 #include <limits.h>
  39 #include <stdlib.h>
  40 /* For strcpy*/
  41 #include <string.h>
  42
  43 /* A trace is a sequence of events gathered in the same tracing session. The
  44    events may be stored in several tracefiles in the same directory.
  45    A trace set is defined when several traces are to be analyzed together,
  46    possibly to study the interactions between events in the different traces.
  47 */
  48
  49
  50 LttvTraceset *lttv_traceset_new(void)
  51 {
  52         LttvTraceset *ts;
  53         struct bt_iter_pos begin_pos;
  54
  55         ts = g_new(LttvTraceset, 1);
  56         ts->filename = NULL;
  57         ts->traces = g_ptr_array_new();
  58         ts->context = bt_context_create();
  59         ts->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
  60         //TODO remove this when we have really mecanism
  61         //s->tmpState = g_new(LttvTraceState *, 1);
  62         //lttv_trace_state_init(s->tmpState,0);
  63
  64         /*Initialize iterator to the beginning of the traces*/
  65         begin_pos.type = BT_SEEK_BEGIN;
  66         ts->iter = bt_ctf_iter_create(ts->context, &begin_pos, NULL);
  67
  68         ts->event_hooks = lttv_hooks_new();
  69
  70         ts->state_trace_handle_index = g_ptr_array_new();
  71         ts->has_precomputed_states = FALSE;
  72
  73         ts->time_span.start_time = ltt_time_zero;
  74         ts->time_span.end_time = ltt_time_zero;
  75         lttv_traceset_get_time_span_real(ts);
  76         return ts;
  77 }
  78
  79 char * lttv_traceset_name(LttvTraceset * s)
  80 {
  81         return s->filename;
  82 }
  83
  84 #ifdef BABEL_CLEANUP
  85 LttvTrace *lttv_trace_new(LttTrace *t)
  86 {
  87         LttvTrace *new_trace;
  88
  89         new_trace = g_new(LttvTrace, 1);
  90         new_trace->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
  91         new_trace->id = t;
  92         new_trace->ref_count = 0;
  93         return new_trace;
  94 }
  95 #endif
  96 /*
  97  * get_absolute_pathname : Return the unique pathname in the system
  98  *
  99  * pathname is the relative path.
 100  *
 101  * abs_pathname is being set to the absolute path.
 102  *
 103  */
 104 void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
 105 {
 106   abs_pathname[0] = '\0';
 107
 108   if (realpath(pathname, abs_pathname) != NULL)
 109     return;
 110   else
 111   {
 112     /* error, return the original path unmodified */
 113     strcpy(abs_pathname, pathname);
 114     return;
 115   }
 116   return;
 117 }
 118
 119
 120
 121 /*
 122  * lttv_trace_create : Create a trace from a path
 123  *
 124  * ts is the traceset in which will be contained the trace
 125  *
 126  * path is the path where to find a trace. It is not recursive.
 127  *
 128  * This function is static since a trace should always be contained in a
 129  * traceset.
 130  *
 131  * return the created trace or NULL on failure
 132  */
 133 static LttvTrace *lttv_trace_create(LttvTraceset *ts, const char *path)
 134 {
 135         int id = bt_context_add_trace(lttv_traceset_get_context(ts),
 136                 path,
 137                 "ctf",
 138                 NULL,
 139                 NULL,
 140                 NULL);
 141         if (id < 0) {
 142                 return NULL;
 143         }
 144         // Create the trace and save the trace handle id returned by babeltrace
 145         LttvTrace *new_trace;
 146
 147         new_trace = g_new(LttvTrace, 1);
 148         new_trace->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 149         new_trace->id = id;
 150         new_trace->ref_count = 0;
 151         new_trace->traceset = ts;
 152         new_trace->state = g_new(LttvTraceState,1);
 153         lttv_trace_state_init(new_trace->state,new_trace);
 154
 155         /* Add the state to the trace_handle to state index */
 156         g_ptr_array_set_size(ts->state_trace_handle_index,id+1);
 157         g_ptr_array_index(ts->state_trace_handle_index,id) = new_trace->state;
 158
 159         return new_trace;
 160 }
 161
 162 /*
 163  * lttv_trace_create : Create and add a single trace to a traceset
 164  *
 165  * ts is the traceset in which will be contained the trace
 166  *
 167  * path is the path where to find a trace. It is not recursive.
 168  *
 169  * return a positive integer (>=0)on success or -1 on failure
 170  */
 171 static int lttv_traceset_create_trace(LttvTraceset *ts, const char *path)
 172 {
 173         LttvTrace *trace = lttv_trace_create(ts, path);
 174         if (trace == NULL) {
 175                 return -1;
 176         }
 177         lttv_traceset_add(ts, trace);
 178         return 0;
 179 }
 180
 181 LttvTraceset *lttv_traceset_copy(LttvTraceset *s_orig)
 182 {
 183         guint i;
 184         LttvTraceset *s;
 185         LttvTrace * trace;
 186
 187         s = g_new(LttvTraceset, 1);
 188         s->filename = NULL;
 189         s->traces = g_ptr_array_new();
 190         s->state_trace_handle_index = g_ptr_array_new();
 191         for(i=0;i<s_orig->traces->len;i++)
 192         {
 193                 trace = g_ptr_array_index(s_orig->traces, i);
 194                 trace->ref_count++;
 195
 196                 /* WARNING: this is an alias, not a copy. */
 197                 g_ptr_array_add(s->traces, trace);
 198
 199                 g_ptr_array_set_size(s->state_trace_handle_index,trace->id+1);
 200                 g_ptr_array_index(s->state_trace_handle_index,trace->id) = trace->state;
 201
 202         }
 203         s->context = s_orig->context;
 204         bt_context_get(s->context);
 205         s->a = LTTV_ATTRIBUTE(lttv_iattribute_deep_copy(LTTV_IATTRIBUTE(s_orig->a)));
 206         return s;
 207 }
 208
 209
 210 LttvTraceset *lttv_traceset_load(const gchar *filename)
 211 {
 212         LttvTraceset *s = g_new(LttvTraceset,1);
 213         FILE *tf;
 214
 215         s->filename = g_strdup(filename);
 216         tf = fopen(filename,"r");
 217
 218         g_critical("NOT IMPLEMENTED : load traceset data from a XML file");
 219
 220         fclose(tf);
 221         return s;
 222 }
 223
 224 gint lttv_traceset_save(LttvTraceset *s)
 225 {
 226         FILE *tf;
 227
 228         tf = fopen(s->filename, "w");
 229
 230         g_critical("NOT IMPLEMENTED : save traceset data in a XML file");
 231
 232         fclose(tf);
 233         return 0;
 234 }
 235
 236 void lttv_traceset_destroy(LttvTraceset *s)
 237 {
 238         guint i;
 239
 240         for(i=0;i<s->traces->len;i++) {
 241                 LttvTrace *trace = g_ptr_array_index(s->traces, i);
 242                 lttv_trace_unref(trace);
 243                 // todo mdenis 2012-03-27: uncomment when babeltrace gets fixed
 244                 //bt_context_remove_trace(lttv_traceset_get_context(s), trace->id);
 245                 if(lttv_trace_get_ref_number(trace) == 0)
 246                         lttv_trace_destroy(trace);
 247         }
 248         g_ptr_array_free(s->traces, TRUE);
 249         bt_context_put(s->context);
 250         g_object_unref(s->a);
 251         g_free(s);
 252 }
 253
 254 struct bt_context *lttv_traceset_get_context(LttvTraceset *s)
 255 {
 256         return s->context;
 257 }
 258
 259 LttvTraceset *lttv_trace_get_traceset(LttvTrace *trace)
 260 {
 261         return trace->traceset;
 262 }
 263
 264 LttvHooks *lttv_traceset_get_hooks(LttvTraceset *s)
 265 {
 266         return s->event_hooks;
 267 }
 268
 269 void lttv_trace_destroy(LttvTrace *t)
 270 {
 271         g_object_unref(t->a);
 272         g_free(t);
 273 }
 274
 275 void lttv_traceset_add(LttvTraceset *s, LttvTrace *t)
 276 {
 277         t->ref_count++;
 278         g_ptr_array_add(s->traces, t);
 279 }
 280
 281 int lttv_traceset_add_path(LttvTraceset *ts, char *trace_path)
 282 {
 283         FTS *tree;
 284         FTSENT *node;
 285         char * const paths[2] = { trace_path, NULL };
 286         int ret = -1;
 287
 288         gboolean metaFileFound = FALSE;
 289
 290         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 291         if (tree == NULL) {
 292                 g_warning("Cannot traverse \"%s\" for reading.\n",
 293                                 trace_path);
 294                 return ret;
 295         }
 296
 297         int dirfd, metafd;
 298         while ((node = fts_read(tree))) {
 299
 300                 if (!(node->fts_info & FTS_D))
 301                         continue;
 302
 303                 dirfd = open(node->fts_accpath, 0);
 304                 if (dirfd < 0) {
 305                         g_warning("Unable to open trace "
 306                                         "directory file descriptor : %s.", node->fts_accpath);
 307                         ret = dirfd;
 308                         goto error;
 309                 }
 310
 311                 // Check if a metadata file exists in the current directory
 312                 metafd = openat(dirfd, "metadata", O_RDONLY);
 313                 if (metafd < 0) {
 314                         ret = close(dirfd);
 315                         if (ret < 0) {
 316                                 g_warning("Unable to open metadata "
 317                                                 "file descriptor : %s.", node->fts_accpath);
 318                                 goto error;
 319                         }
 320                 } else {
 321                         ret = close(metafd);
 322                         if (ret < 0) {
 323                                 g_warning("Unable to close metadata "
 324                                                 "file descriptor : %s.", node->fts_accpath);
 325                                 goto error;
 326                         }
 327                         ret = close(dirfd);
 328                         if (ret < 0) {
 329                                 g_warning("Unable to close trace "
 330                                                 "directory file descriptor : %s.", node->fts_accpath);
 331                                 goto error;
 332                         }
 333
 334                         ret = lttv_traceset_create_trace(ts, node->fts_accpath);
 335                         if (ret < 0) {
 336                                 g_warning("Opening trace \"%s\" from %s "
 337                                                 "for reading.", node->fts_accpath, trace_path);
 338                                 goto error;
 339                         }
 340                         metaFileFound = TRUE;
 341                 }
 342         }
 343
 344 error:
 345         ret = fts_close(tree);
 346         if (ret < 0) {
 347                 g_warning("Unable to close tree  "
 348                                 "file descriptor : %s.", trace_path);
 349         }
 350         if(metaFileFound)
 351           return ret;
 352         else
 353           return -1;
 354 }
 355
 356
 357 unsigned lttv_traceset_number(LttvTraceset *s)
 358 {
 359         return s->traces->len;
 360 }
 361
 362
 363 LttvTrace *lttv_traceset_get(LttvTraceset *s, unsigned i)
 364 {
 365         g_assert(s->traces->len > i);
 366         return ((LttvTrace *)s->traces->pdata[i]);
 367 }
 368
 369
 370 void lttv_traceset_remove(LttvTraceset *s, unsigned i)
 371 {
 372         LttvTrace * t;
 373         g_assert(s->traces->len > i);
 374         t = (LttvTrace *)s->traces->pdata[i];
 375         t->ref_count--;
 376         bt_context_remove_trace(lttv_traceset_get_context(s), t->id);
 377         g_ptr_array_remove_index(s->traces, i);
 378 }
 379
 380
 381 /* A set of attributes is attached to each trace set, trace and tracefile
 382          to store user defined data as needed. */
 383
 384 LttvAttribute *lttv_traceset_attribute(LttvTraceset *s)
 385 {
 386         return s->a;
 387 }
 388
 389
 390 LttvAttribute *lttv_trace_attribute(LttvTrace *t)
 391 {
 392         return t->a;
 393 }
 394
 395
 396 gint lttv_trace_get_id(LttvTrace *t)
 397 {
 398         return t->id;
 399 }
 400
 401 guint lttv_trace_get_ref_number(LttvTrace * t)
 402 {
 403         // todo mdenis: adapt to babeltrace
 404         return t->ref_count;
 405 }
 406
 407 guint lttv_trace_ref(LttvTrace * t)
 408 {
 409         t->ref_count++;
 410
 411         return t->ref_count;
 412 }
 413
 414 guint lttv_trace_unref(LttvTrace * t)
 415 {
 416         if(likely(t->ref_count > 0))
 417                 t->ref_count--;
 418
 419         return t->ref_count;
 420 }
 421
 422 guint lttv_trace_get_num_cpu(LttvTrace *t)
 423 {
 424 #warning "TODO - Set the right number of CPU"
 425         return 24;
 426 }
 427
 428 LttvTracesetPosition *lttv_traceset_create_current_position(LttvTraceset *traceset)
 429 {
 430         LttvTracesetPosition *traceset_pos;
 431
 432         traceset_pos = g_new(LttvTracesetPosition, 1);
 433
 434         /* Check if the new passed */
 435         if(traceset_pos == NULL) {
 436                 return NULL;
 437         }
 438
 439         traceset_pos->iter = traceset->iter;
 440         traceset_pos->bt_pos = bt_iter_get_pos(bt_ctf_get_iter(traceset->iter));
 441         traceset_pos->timestamp = G_MAXUINT64;
 442         traceset_pos->cpu_id = INT_MAX;
 443
 444         return traceset_pos;
 445 }
 446
 447 LttvTracesetPosition *lttv_traceset_create_time_position(LttvTraceset *traceset,
 448                                                                 LttTime timestamp)
 449 {
 450         LttvTracesetPosition *traceset_pos;
 451
 452         traceset_pos = g_new(LttvTracesetPosition, 1);
 453
 454         /* Check if the new passed */
 455         if(traceset_pos == NULL) {
 456                 return NULL;
 457         }
 458
 459         traceset_pos->iter = traceset->iter;
 460         traceset_pos->bt_pos = bt_iter_create_time_pos(
 461                                         bt_ctf_get_iter(traceset_pos->iter),
 462                                         ltt_time_to_uint64(timestamp));
 463         traceset_pos->timestamp = G_MAXUINT64;
 464         traceset_pos->cpu_id = INT_MAX;
 465         return traceset_pos;
 466 }
 467
 468 void lttv_traceset_destroy_position(LttvTracesetPosition *traceset_pos)
 469 {
 470         bt_iter_free_pos(traceset_pos->bt_pos);
 471         g_free(traceset_pos);
 472 }
 473
 474 void lttv_traceset_seek_to_position(const LttvTracesetPosition *traceset_pos)
 475 {
 476         bt_iter_set_pos(bt_ctf_get_iter(traceset_pos->iter), traceset_pos->bt_pos);
 477 }
 478
 479 guint lttv_traceset_get_cpuid_from_event(LttvEvent *event)
 480 {
 481         unsigned long timestamp;
 482         unsigned int cpu_id;
 483
 484         struct bt_ctf_event *ctf_event = event->bt_event;
 485         timestamp = bt_ctf_get_timestamp(ctf_event);
 486         if (timestamp == -1ULL) {
 487                 return 0;
 488         }
 489         const struct definition *scope = bt_ctf_get_top_level_scope(ctf_event, BT_STREAM_PACKET_CONTEXT);
 490         if (bt_ctf_field_get_error()) {
 491                 return 0;
 492         }
 493         cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(ctf_event, scope, "cpu_id"));
 494         if (bt_ctf_field_get_error()) {
 495                 return 0;
 496         } else {
 497                 return cpu_id;
 498         }
 499 }
 500
 501 guint64 lttv_traceset_get_timestamp_first_event(LttvTraceset *ts)
 502 {
 503         LttvTracesetPosition begin_position;
 504         struct bt_iter_pos pos;
 505         begin_position.bt_pos = &pos;
 506         begin_position.timestamp = G_MAXUINT64;
 507         begin_position.cpu_id = INT_MAX;
 508
 509          /* Assign iterator to the beginning of the traces */
 510         begin_position.bt_pos->type = BT_SEEK_BEGIN;
 511         begin_position.iter = ts->iter;
 512
 513         return lttv_traceset_position_get_timestamp(&begin_position);
 514 }
 515
 516 guint64 lttv_traceset_get_timestamp_last_event(LttvTraceset *ts)
 517 {
 518         LttvTracesetPosition last_position;
 519         struct bt_iter_pos pos;
 520         last_position.bt_pos = &pos;
 521         last_position.timestamp = G_MAXUINT64;
 522         last_position.cpu_id = INT_MAX;
 523
 524         /* Assign iterator to the last event of the traces */
 525         last_position.bt_pos->type = BT_SEEK_LAST;
 526         last_position.iter = ts->iter;
 527
 528         return lttv_traceset_position_get_timestamp(&last_position);
 529 }
 530
 531 /*
 532  * lttv_traceset_get_timestamp_begin : returns the  minimum timestamp of
 533  * all the traces in the traceset.
 534  *
 535  */
 536 guint64 lttv_traceset_get_timestamp_begin(LttvTraceset *traceset)
 537 {
 538         struct bt_context *bt_ctx;
 539         bt_ctx = lttv_traceset_get_context(traceset);
 540         guint64 timestamp_min, timestamp_cur = 0;
 541         int i;
 542         int trace_count;
 543         LttvTrace *currentTrace;
 544         trace_count = traceset->traces->len;
 545         if(trace_count == 0)
 546                 timestamp_min = 0;
 547         else{
 548                 timestamp_min = G_MAXUINT64;
 549                 for(i = 0; i < trace_count;i++)
 550                 {
 551                         currentTrace = g_ptr_array_index(traceset->traces,i);
 552                         timestamp_cur = bt_trace_handle_get_timestamp_begin(bt_ctx,
 553                                                                         currentTrace->id,
 554                                                                         BT_CLOCK_REAL);
 555                         if(timestamp_cur < timestamp_min)
 556                                 timestamp_min = timestamp_cur;
 557                 }
 558         }
 559         return timestamp_min;
 560 }
 561
 562 /*
 563  * lttv_traceset_get_timestamp_end: returns the maximum timestamp of
 564  * all the traces in the traceset.
 565  *
 566  */
 567 guint64 lttv_traceset_get_timestamp_end(LttvTraceset *traceset)
 568 {
 569         struct bt_context *bt_ctx;
 570         bt_ctx = lttv_traceset_get_context(traceset);
 571         guint64 timestamp_max, timestamp_cur = 0;
 572         int i;
 573         int trace_count;
 574         LttvTrace *currentTrace;
 575         trace_count = traceset->traces->len;
 576
 577         if(trace_count == 0){
 578                 timestamp_max = 1;
 579         }
 580         else{
 581                 timestamp_max = 0;
 582                 for(i =0; i < trace_count;i++)
 583                 {
 584                         currentTrace = g_ptr_array_index(traceset->traces,i);
 585                         timestamp_cur = bt_trace_handle_get_timestamp_end(bt_ctx,
 586                                                                         currentTrace->id,
 587                                                                         BT_CLOCK_REAL);
 588                         if(timestamp_cur > timestamp_max){
 589                                 timestamp_max = timestamp_cur;
 590                         }
 591                 }
 592         }
 593         return timestamp_max;
 594 }
 595 /*
 596  * lttv_traceset_get_time_span_real : return a TimeInterval representing the
 597  * minimum timestamp and the maximum timestamp of the traceset.
 598  *
 599  */
 600 TimeInterval lttv_traceset_get_time_span_real(LttvTraceset *ts)
 601 {
 602
 603
 604         if(ltt_time_compare(ts->time_span.start_time,
 605                                 ltt_time_zero) == 0 && ts->traces->len > 0){
 606                 ts->time_span.start_time = ltt_time_from_uint64(
 607                                 lttv_traceset_get_timestamp_first_event(ts));
 608                 ts->time_span.end_time = ltt_time_from_uint64(
 609                                         lttv_traceset_get_timestamp_last_event(ts));
 610         }
 611         return ts->time_span;
 612 }
 613
 614 /*
 615  * lttv_traceset_get_time_span : return a TimeInterval representing the
 616  * minimum timestamp and the maximum timestamp of the traceset.
 617  *
 618  */
 619 TimeInterval lttv_traceset_get_time_span(LttvTraceset *ts)
 620 {
 621         if(ltt_time_compare(ts->time_span.start_time, ltt_time_zero) == 0){
 622                 ts->time_span.start_time =ltt_time_from_uint64(
 623                                         lttv_traceset_get_timestamp_begin(ts));
 624                 ts->time_span.end_time = ltt_time_from_uint64(
 625                                         lttv_traceset_get_timestamp_end(ts));
 626         }
 627         return ts->time_span;
 628 }
 629
 630 const char *lttv_traceset_get_name_from_event(LttvEvent *event)
 631 {
 632         return bt_ctf_event_name(event->bt_event);
 633 }
 634
 635 int set_values_position(const LttvTracesetPosition *pos)
 636 {
 637         LttvTracesetPosition previous_pos;
 638         previous_pos.iter = pos->iter;
 639         previous_pos.bt_pos = bt_iter_get_pos(bt_ctf_get_iter(pos->iter));
 640         /* Seek to the new desired position */
 641         lttv_traceset_seek_to_position(pos);
 642         /*Read the event*/
 643         struct bt_ctf_event *event = bt_ctf_iter_read_event(pos->iter);
 644
 645         if(event != NULL){
 646                 ((LttvTracesetPosition *)pos)->timestamp = bt_ctf_get_timestamp(event);
 647
 648                 LttvEvent lttv_event;
 649                 lttv_event.bt_event = event;
 650                 ((LttvTracesetPosition *)pos)->cpu_id = lttv_traceset_get_cpuid_from_event(&lttv_event);
 651         }
 652         else {
 653                 /* The event is null */
 654                 return 0;
 655         }
 656
 657         /* Reassign the previously saved position */
 658         lttv_traceset_seek_to_position(&previous_pos);
 659         /*We must desallocate because the function bt_iter_get_pos() does a g_new */
 660         bt_iter_free_pos(previous_pos.bt_pos);
 661         return 1;
 662 }
 663
 664 guint64 lttv_traceset_position_get_timestamp(const LttvTracesetPosition *pos)
 665 {
 666         if(pos->timestamp == G_MAXUINT64){
 667                 if(set_values_position(pos) == 0){
 668                         return 0;
 669                 }
 670         }
 671
 672         return pos->timestamp;
 673 }
 674
 675 int lttv_traceset_position_get_cpuid(const LttvTracesetPosition *pos){
 676         if(pos->cpu_id == INT_MAX ){
 677                  if(set_values_position(pos) == 0){
 678                         return 0;
 679                 }
 680         }
 681         return pos->cpu_id;
 682 }
 683
 684 LttTime  lttv_traceset_position_get_time(const LttvTracesetPosition *pos)
 685 {
 686         return ltt_time_from_uint64(lttv_traceset_position_get_timestamp(pos));
 687 }
 688
 689
 690
 691 int lttv_traceset_position_compare(const LttvTracesetPosition *pos1, const LttvTracesetPosition *pos2)
 692 {
 693 #warning " TODO :Rename for lttv_traceset_position_equals && Must return COMPARAISON OF THE 2 POSITION && verify if it is the best way to compare position"
 694         if(pos1 == NULL || pos2 == NULL){
 695                 return -1;
 696         }
 697
 698         guint64 timeStampPos1,timeStampPos2;
 699         guint cpuId1, cpuId2;
 700
 701         timeStampPos1 = lttv_traceset_position_get_timestamp(pos1);
 702         timeStampPos2 = lttv_traceset_position_get_timestamp(pos2);
 703
 704
 705         cpuId1 = lttv_traceset_position_get_cpuid(pos1);
 706         cpuId2 = lttv_traceset_position_get_cpuid(pos2);
 707
 708         if(timeStampPos1 == timeStampPos2 && cpuId1 == cpuId2){
 709                 return 0;
 710         }
 711         else{
 712                 return 1;
 713         }
 714 }
 715
 716 int lttv_traceset_position_time_compare(const LttvTracesetPosition *pos1,
 717                                         const LttvTracesetPosition *pos2)
 718 {
 719         guint64 timeStampPos1,timeStampPos2;
 720
 721         timeStampPos1 = lttv_traceset_position_get_timestamp(pos1);
 722         timeStampPos2 = lttv_traceset_position_get_timestamp(pos2);
 723
 724         return timeStampPos1 - timeStampPos2;
 725 }
 726 int lttv_traceset_position_compare_current(const LttvTraceset *ts,
 727                                            const LttvTracesetPosition *pos)
 728 {
 729         int result = 0;
 730         LttvTracesetPosition *curPos = lttv_traceset_create_current_position(ts);
 731
 732         result = lttv_traceset_position_compare(curPos,pos);
 733
 734         lttv_traceset_destroy_position(curPos);
 735
 736         return result;
 737 }
 738
 739 LttTime lttv_traceset_get_current_time(const LttvTraceset *ts)
 740 {
 741         LttvTracesetPosition *curPos = lttv_traceset_create_current_position(ts);
 742         guint64 currentTimestamp = lttv_traceset_position_get_timestamp(curPos);
 743         lttv_traceset_destroy_position(curPos);
 744
 745         return ltt_time_from_uint64(currentTimestamp);
 746 }