lttv/lttv/sync/sync_chain.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2009 Benjamin Poirier <benjamin.poirier@polymtl.ca>
   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 <errno.h>
  24 #include <unistd.h>
  25
  26 #include "sync_chain.h"
  27
  28
  29 GQueue processingModules= G_QUEUE_INIT;
  30 GQueue matchingModules= G_QUEUE_INIT;
  31 GQueue analysisModules= G_QUEUE_INIT;
  32 GQueue moduleOptions= G_QUEUE_INIT;
  33
  34
  35 /*
  36  * Calculate the elapsed time between two timeval values
  37  *
  38  * Args:
  39  *   end:          end time, result is also stored in this structure
  40  *   start:        start time
  41  */
  42 void timeDiff(struct timeval* const end, const struct timeval* const start)
  43 {
  44                 if (end->tv_usec >= start->tv_usec)
  45                 {
  46                         end->tv_sec-= start->tv_sec;
  47                         end->tv_usec-= start->tv_usec;
  48                 }
  49                 else
  50                 {
  51                         end->tv_sec= end->tv_sec - start->tv_sec - 1;
  52                         end->tv_usec= end->tv_usec - start->tv_usec + 1e6;
  53                 }
  54 }
  55
  56
  57 /*
  58  * A GCompareFunc for g_slist_find_custom()
  59  *
  60  * Args:
  61  *   a:            ProcessingModule*, element's data
  62  *   b:            char*, user data to compare against
  63  *
  64  * Returns:
  65  *   0 if the processing module a's name is b
  66  */
  67 gint gcfCompareProcessing(gconstpointer a, gconstpointer b)
  68 {
  69         const ProcessingModule* processingModule;
  70         const char* name;
  71
  72         processingModule= (const ProcessingModule*) a;
  73         name= (const char*) b;
  74
  75         return strncmp(processingModule->name, name,
  76                 strlen(processingModule->name) + 1);
  77 }
  78
  79
  80 /*
  81  * A GCompareFunc for g_slist_find_custom()
  82  *
  83  * Args:
  84  *   a:            MatchingModule*, element's data
  85  *   b:            char*, user data to compare against
  86  *
  87  * Returns:
  88  *   0 if the matching module a's name is b
  89  */
  90 gint gcfCompareMatching(gconstpointer a, gconstpointer b)
  91 {
  92         const MatchingModule* matchingModule;
  93         const char* name;
  94
  95         matchingModule= (const MatchingModule*) a;
  96         name= (const char*) b;
  97
  98         return strncmp(matchingModule->name, name, strlen(matchingModule->name) +
  99                 1);
 100 }
 101
 102
 103 /*
 104  * A GCompareFunc for g_slist_find_custom()
 105  *
 106  * Args:
 107  *   a:            AnalysisModule*, element's data
 108  *   b:            char*, user data to compare against
 109  *
 110  * Returns:
 111  *   0 if the analysis module a's name is b
 112  */
 113 gint gcfCompareAnalysis(gconstpointer a, gconstpointer b)
 114 {
 115         const AnalysisModule* analysisModule;
 116         const char* name;
 117
 118         analysisModule= (const AnalysisModule*) a;
 119         name= (const char*) b;
 120
 121         return strncmp(analysisModule->name, name, strlen(analysisModule->name) +
 122                 1);
 123 }