glib/tests/timeloop.c
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 16:46:38 +0300
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Revision: 201011 Kit: 201015
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/*
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* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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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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   116
#ifdef __SYMBIAN32__
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GIOChannel *in_channel,*out_channel;
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   118
#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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   130
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  val = 0;
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  write_all (out_channel, (char *)&val, sizeof (val));
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   133
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  val = g_timer_elapsed (timer, NULL) * 1000;
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  write_all (out_channel, (char *)&val, sizeof (val));
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   137
  g_timer_destroy (timer);
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   138
#ifndef __SYMBIAN32__ 
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  exit (0);
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   140
#else
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  return NULL;
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   142
#endif//__SYMBIAN32__  
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}
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   144
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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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   149
{
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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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   157
#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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   162
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  if (val)
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   164
    {
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   165
      write_all (dest, (char *)&val, sizeof(val));
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   166
      
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      return TRUE;
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    }
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  else
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    {
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   171
      g_io_channel_close (source);
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      g_io_channel_close (dest);
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   173
      
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   174
      g_io_channel_unref (source);
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   175
      g_io_channel_unref (dest);
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   176
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      n_active_children--;
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   178
      if (n_active_children == 0)
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   179
	g_main_loop_quit (loop);
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   180
      
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      return FALSE;
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   182
    }
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   183
}
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   184
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static void
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create_child (void)
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   187
{
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   188
#ifndef __SYMBIAN32__
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  int pid;
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   190
#else  
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  GError *err = NULL;
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   192
#endif//__SYMBIAN32__    
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   193
  GIOChannel *in_channels[2];
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   194
  GIOChannel *out_channels[2];
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   195
#ifdef __SYMBIAN32__  
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  GIOChannel **sub_channels;
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   197
  
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   198
  sub_channels = g_new (GIOChannel *, 2);
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   199
  
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   200
  io_pipe (in_channels);
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   201
  io_pipe (out_channels);
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   202
  sub_channels[0] = in_channels[0];
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   203
  sub_channels[1] = out_channels[1];
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diff changeset
   204
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   205
  g_io_add_watch (out_channels[0], G_IO_IN | G_IO_HUP,
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   206
		      input_callback, in_channels[1]);
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   207
  
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   208
  g_thread_create(run_child,sub_channels,FALSE,&err);
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   209
#else
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   210
  pid = fork ();
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   211
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   212
  if (pid > 0)			/* Parent */
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   213
    {
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   214
      g_io_channel_close (in_channels[0]);
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   215
      g_io_channel_close (out_channels[1]);
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parents:
diff changeset
   216
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   217
      g_io_add_watch (out_channels[0], G_IO_IN | G_IO_HUP,
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parents:
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   218
		      input_callback, in_channels[1]);
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   219
    }
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   220
  else if (pid == 0)		/* Child */
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parents:
diff changeset
   221
    {
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   222
      g_io_channel_close (in_channels[1]);
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parents:
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   223
      g_io_channel_close (out_channels[0]);
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parents:
diff changeset
   224
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   225
      setsid ();
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parents:
diff changeset
   226
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   227
      run_child (in_channels[0], out_channels[1]);
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   228
    }
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   229
  else				/* Error */
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    {
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      fprintf (stderr, "Cannot fork: %s\n", g_strerror (errno));
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      exit (1);
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    }
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#endif//__SYMBIAN32__	
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}
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static double 
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difftimeval (struct timeval *old, struct timeval *new)
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{
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  return
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    (new->tv_sec - old->tv_sec) * 1000. + (new->tv_usec - old->tv_usec) / 1000;
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}
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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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}