glib/tests/timeloop.c
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 11 Jun 2010 15:26:22 +0300
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permissions -rw-r--r--
Revision: 201023 Kit: 2010123
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/* Portion Copyright © 2008-09 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.*/
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#undef G_DISABLE_ASSERT
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#undef G_LOG_DOMAIN
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <glib.h>
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#ifdef __SYMBIAN32__
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#include <glib_global.h>
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#include "mrt2_glib2_test.h"
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#endif /*__SYMBIAN32__*/
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static int n_children = 3;
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static int n_active_children;
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static int n_iters = 10000;
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static GMainLoop *loop;
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static void
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io_pipe (GIOChannel **channels)
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{
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  int fds[2];
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  if (pipe(fds) < 0)
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    {
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      g_print ("Cannot create pipe %s\n", g_strerror (errno));
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      g_assert(FALSE && "timeloop failed");  
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#ifdef __SYMBIAN32__
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  testResultXml("timeloop");
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#endif /* EMULATOR */
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      exit (1);
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    }
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  channels[0] = g_io_channel_unix_new (fds[0]);
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  channels[1] = g_io_channel_unix_new (fds[1]);
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}
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static gboolean
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read_all (GIOChannel *channel, char *buf, int len)
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{
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  gsize bytes_read = 0;
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  gsize count;
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  GIOError err;
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  while (bytes_read < len)
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    {
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      err = g_io_channel_read (channel, buf + bytes_read, len - bytes_read, &count);
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      if (err)
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	{
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	  if (err != G_IO_ERROR_AGAIN)
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	  {
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	  	g_assert(FALSE && "timeloop failed");
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	    return FALSE;
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	  }
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	}
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      else if (count == 0)
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	return FALSE;
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      bytes_read += count;
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    }
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  return TRUE;
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}
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static gboolean
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write_all (GIOChannel *channel, char *buf, int len)
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{
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  gsize bytes_written = 0;
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  gsize count;
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  GIOError err;
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  while (bytes_written < len)
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    {
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      err = g_io_channel_write (channel, buf + bytes_written, len - bytes_written, &count);
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      if (err && err != G_IO_ERROR_AGAIN)
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	return FALSE;
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      bytes_written += count;
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    }
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  return TRUE;
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}
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#ifndef __SYMBIAN32__
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static void
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run_child (GIOChannel *in_channel, GIOChannel *out_channel)
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#else
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gpointer
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run_child (gpointer data)
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#endif//__SYMBIAN32__
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{
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  int i;
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  int val = 1;
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#ifdef __SYMBIAN32__
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GIOChannel *in_channel,*out_channel;
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#endif//__SYMBIAN32__
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  GTimer *timer = g_timer_new();
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#ifdef __SYMBIAN32__  
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  GIOChannel **channels = data;  
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  in_channel = channels[0];
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  out_channel = channels[1];
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#endif//__SYMBIAN32__
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  for (i = 0; i < n_iters; i++)
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    {
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      write_all (out_channel, (char *)&val, sizeof (val));
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      read_all (in_channel, (char *)&val, sizeof (val));
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    }
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   114
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   115
  val = 0;
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  write_all (out_channel, (char *)&val, sizeof (val));
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   117
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  val = g_timer_elapsed (timer, NULL) * 1000;
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   119
  
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  write_all (out_channel, (char *)&val, sizeof (val));
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   121
  g_timer_destroy (timer);
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   122
#ifndef __SYMBIAN32__ 
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  exit (0);
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   124
#else
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  return NULL;
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   126
#endif//__SYMBIAN32__  
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}
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   128
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static gboolean
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input_callback (GIOChannel   *source,
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		GIOCondition  condition,
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		gpointer      data)
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{
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  int val;
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  GIOChannel *dest = (GIOChannel *)data;
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  if (!read_all (source, (char *)&val, sizeof(val)))
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    {
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      g_print("Unexpected EOF\n");
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      g_assert(FALSE && "timeloop failed");
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   141
#ifdef __SYMBIAN32__
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  testResultXml("timeloop");
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#endif /* EMULATOR */
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      exit (1);
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    }
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   146
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  if (val)
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    {
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      write_all (dest, (char *)&val, sizeof(val));
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      return TRUE;
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    }
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  else
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    {
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      g_io_channel_close (source);
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      g_io_channel_close (dest);
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   157
      
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      g_io_channel_unref (source);
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   159
      g_io_channel_unref (dest);
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   160
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      n_active_children--;
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      if (n_active_children == 0)
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	g_main_loop_quit (loop);
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   164
      
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      return FALSE;
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   166
    }
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}
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   168
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static void
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create_child (void)
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{
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   172
#ifndef __SYMBIAN32__
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  int pid;
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#else  
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  GError *err = NULL;
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   176
#endif//__SYMBIAN32__    
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  GIOChannel *in_channels[2];
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  GIOChannel *out_channels[2];
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   179
#ifdef __SYMBIAN32__  
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  GIOChannel **sub_channels;
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   181
  
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  sub_channels = g_new (GIOChannel *, 2);
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   183
  
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   184
  io_pipe (in_channels);
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   185
  io_pipe (out_channels);
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   186
  sub_channels[0] = in_channels[0];
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   187
  sub_channels[1] = out_channels[1];
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   188
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   189
  g_io_add_watch (out_channels[0], G_IO_IN | G_IO_HUP,
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   190
		      input_callback, in_channels[1]);
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   191
  
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   192
  g_thread_create(run_child,sub_channels,FALSE,&err);
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   193
#else
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   194
  pid = fork ();
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   195
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   196
  if (pid > 0)			/* Parent */
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   197
    {
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   198
      g_io_channel_close (in_channels[0]);
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   199
      g_io_channel_close (out_channels[1]);
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parents:
diff changeset
   200
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   201
      g_io_add_watch (out_channels[0], G_IO_IN | G_IO_HUP,
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parents:
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   202
		      input_callback, in_channels[1]);
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parents:
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   203
    }
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   204
  else if (pid == 0)		/* Child */
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   205
    {
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   206
      g_io_channel_close (in_channels[1]);
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parents:
diff changeset
   207
      g_io_channel_close (out_channels[0]);
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parents:
diff changeset
   208
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   209
      setsid ();
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parents:
diff changeset
   210
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   211
      run_child (in_channels[0], out_channels[1]);
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   212
    }
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   213
  else				/* Error */
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parents:
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   214
    {
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   215
      fprintf (stderr, "Cannot fork: %s\n", g_strerror (errno));
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   216
      exit (1);
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   217
    }
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   218
#endif//__SYMBIAN32__	
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   219
}
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diff changeset
   220
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   221
static double 
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   222
difftimeval (struct timeval *old, struct timeval *new)
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parents:
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   223
{
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   224
  return
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   225
    (new->tv_sec - old->tv_sec) * 1000. + (new->tv_usec - old->tv_usec) / 1000;
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parents:
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   226
}
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parents:
diff changeset
   227
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   228
int 
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main (int argc, char **argv)
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{
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  int i;
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  #ifdef __SYMBIAN32__
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  g_log_set_handler (NULL,  G_LOG_FLAG_FATAL| G_LOG_FLAG_RECURSION | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_MESSAGE | G_LOG_LEVEL_INFO | G_LOG_LEVEL_DEBUG, &mrtLogHandler, NULL);
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  g_set_print_handler(mrtPrintHandler);
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  g_thread_init(NULL);
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  #endif /*__SYMBIAN32__*/
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  if (argc > 1)
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    n_children = atoi(argv[1]);
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  if (argc > 2)
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    n_iters = atoi(argv[2]);
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  printf ("Children: %d     Iters: %d\n", n_children, n_iters);
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  n_active_children = n_children;
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  for (i = 0; i < n_children; i++)
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    create_child ();
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#ifndef __SYMBIAN32__
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  getrusage (RUSAGE_SELF, &old_usage);
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#endif  
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  loop = g_main_loop_new (NULL, FALSE);
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  g_main_loop_run (loop);
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#ifndef __SYMBIAN32__   
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  getrusage (RUSAGE_SELF, &new_usage);
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  printf ("Elapsed user: %g\n",
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	  difftimeval (&old_usage.ru_utime, &new_usage.ru_utime));
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  printf ("Elapsed system: %g\n",
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	  difftimeval (&old_usage.ru_stime, &new_usage.ru_stime));
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  printf ("Elapsed total: %g\n",
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	  difftimeval (&old_usage.ru_utime, &new_usage.ru_utime) +	   
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	  difftimeval (&old_usage.ru_stime, &new_usage.ru_stime));
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  printf ("total / iteration: %g\n",
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	  (difftimeval (&old_usage.ru_utime, &new_usage.ru_utime) +	   
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	   difftimeval (&old_usage.ru_stime, &new_usage.ru_stime)) /
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	  (n_iters * n_children));
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#endif	  
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  #ifdef __SYMBIAN32__
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  testResultXml("timeloop");
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  #endif /* EMULATOR */
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  return 0;
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}