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 <string.h>
  25 #include <unistd.h>
  26
  27 #include "sync_chain.h"
  28
  29
  30 GQueue processingModules= G_QUEUE_INIT;
  31 GQueue matchingModules= G_QUEUE_INIT;
  32 GQueue analysisModules= G_QUEUE_INIT;
  33 GQueue moduleOptions= G_QUEUE_INIT;
  34
  35
  36 /*
  37  * Calculate the elapsed time between two timeval values
  38  *
  39  * Args:
  40  *   end:          end time, result is also stored in this structure
  41  *   start:        start time
  42  */
  43 void timeDiff(struct timeval* const end, const struct timeval* const start)
  44 {
  45                 if (end->tv_usec >= start->tv_usec)
  46                 {
  47                         end->tv_sec-= start->tv_sec;
  48                         end->tv_usec-= start->tv_usec;
  49                 }
  50                 else
  51                 {
  52                         end->tv_sec= end->tv_sec - start->tv_sec - 1;
  53                         end->tv_usec= end->tv_usec - start->tv_usec + 1e6;
  54                 }
  55 }
  56
  57
  58 /*
  59  * A GCompareFunc for g_slist_find_custom()
  60  *
  61  * Args:
  62  *   a:            ProcessingModule*, element's data
  63  *   b:            char*, user data to compare against
  64  *
  65  * Returns:
  66  *   0 if the processing module a's name is b
  67  */
  68 gint gcfCompareProcessing(gconstpointer a, gconstpointer b)
  69 {
  70         const ProcessingModule* processingModule;
  71         const char* name;
  72
  73         processingModule= (const ProcessingModule*) a;
  74         name= (const char*) b;
  75
  76         return strncmp(processingModule->name, name,
  77                 strlen(processingModule->name) + 1);
  78 }
  79
  80
  81 /*
  82  * A GCompareFunc for g_slist_find_custom()
  83  *
  84  * Args:
  85  *   a:            MatchingModule*, element's data
  86  *   b:            char*, user data to compare against
  87  *
  88  * Returns:
  89  *   0 if the matching module a's name is b
  90  */
  91 gint gcfCompareMatching(gconstpointer a, gconstpointer b)
  92 {
  93         const MatchingModule* matchingModule;
  94         const char* name;
  95
  96         matchingModule= (const MatchingModule*) a;
  97         name= (const char*) b;
  98
  99         return strncmp(matchingModule->name, name, strlen(matchingModule->name) +
 100                 1);
 101 }
 102
 103
 104 /*
 105  * A GCompareFunc for g_slist_find_custom()
 106  *
 107  * Args:
 108  *   a:            AnalysisModule*, element's data
 109  *   b:            char*, user data to compare against
 110  *
 111  * Returns:
 112  *   0 if the analysis module a's name is b
 113  */
 114 gint gcfCompareAnalysis(gconstpointer a, gconstpointer b)
 115 {
 116         const AnalysisModule* analysisModule;
 117         const char* name;
 118
 119         analysisModule= (const AnalysisModule*) a;
 120         name= (const char*) b;
 121
 122         return strncmp(analysisModule->name, name, strlen(analysisModule->name) +
 123                 1);
 124 }