/*
* Copyright (c) 2004, Bull S.A..  All rights reserved.
* Created by: Sebastien Decugis

* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.


* This sample test aims to check the following assertion:
*
* The CPU-time clock of the new process/ new process's thread is initialized to 0.

* The steps are:
* -> compute until the parent process CPU-time clock is greater than 1 sec.
* -> fork
* -> check the child process process CPU time and thread CPU time clocks.

* The test fails if any of these clocks are > 1sec.

*/


/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
#define _POSIX_C_SOURCE 200112L

/********************************************************************************************/
/****************************** standard includes *****************************************/
/********************************************************************************************/
#include <pthread.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

#include <sys/wait.h>
 #include <errno.h>

#include <time.h> 
/********************************************************************************************/
/******************************   Test framework   *****************************************/
/********************************************************************************************/
#include "testfrmw.h"
 #include "testfrmw.c" 
/* This header is responsible for defining the following macros:
 * UNRESOLVED(ret, descr);  
 *    where descr is a description of the error and ret is an int (error code for example)
 * FAILED(descr);
 *    where descr is a short text saying why the test has failed.
 * PASSED();
 *    No parameter.
 * 
 * Both three macros shall terminate the calling process.
 * The testcase shall not terminate in any other maneer.
 * 
 * The other file defines the functions
 * void output_init()
 * void output(char * string, ...)
 * 
 * Those may be used to output information.
 */

/********************************************************************************************/
/********************************** Configuration ******************************************/
/********************************************************************************************/
#ifndef VERBOSE
#define VERBOSE 1
#endif

/********************************************************************************************/
/***********************************    Test case   *****************************************/
/********************************************************************************************/

/* The main test function. */
int main( int argc, char * argv[] )
{
	int ret, status;
	pid_t child, ctl;

	long ctp, ctt;
	clockid_t clp, clt;

	struct timespec tp;

	/* Initialize output */
	output_init();

	ctp = sysconf( _SC_CPUTIME );
	ctt = sysconf( _SC_THREAD_CPUTIME );

	if ( ( ctp == -1 ) && ( ctt == -1 ) )
	{
		UNTESTED( "The testcase needs CPUTIME or THREAD_CPUTIME support" );
	}

#if VERBOSE > 0
	output( "System abilities:\n" );

	output( "  _POSIX_CPUTIME        : %ld\n", ctp );

	output( "  _POSIX_THREAD_CPUTIME : %ld\n", ctt );

#endif
	if ( ctp > 0 )
	{
		ret = clock_getcpuclockid( 0, &clp );

		if ( ret != 0 )
		{
			UNRESOLVED( ret, "Unable to get cpu-time clock id of the process" );
		}

		do
		{
			ret = clock_gettime( clp, &tp );

			if ( ret != 0 )
			{
				UNRESOLVED( errno, "Failed to read CPU time clock" );
			}
		}
		while ( tp.tv_sec < 1 );
	}

	if ( ctt > 0 )
	{
		ret = pthread_getcpuclockid( pthread_self(), &clt );

		if ( ret != 0 )
		{
			UNRESOLVED( ret, "Unable to get cpu-time clock id of the thread" );
		}

		do
		{
			ret = clock_gettime( clt, &tp );

			if ( ret != 0 )
			{
				UNRESOLVED( errno, "Failed to read thread CPU time clock" );
			}
		}
		while ( tp.tv_sec < 1 );
	}


	/* Create the child */
	child = fork();

	if ( child == ( pid_t ) - 1 )
	{
		UNRESOLVED( errno, "Failed to fork" );
	}

	/* child */
	if ( child == ( pid_t ) 0 )
	{
		if ( ctp > 0 )
		{
			ret = clock_getcpuclockid( 0, &clp );

			if ( ret != 0 )
			{
				UNRESOLVED( ret, "Unable to get cpu-time clock id of the process" );
			}

			ret = clock_gettime( clp, &tp );

			if ( ret != 0 )
			{
				UNRESOLVED( errno, "Failed to read CPU time clock" );
			}

			if ( tp.tv_sec > 0 )
			{
				FAILED( "The process CPU-time clock was not reset in child\n" );
			}
		}

		if ( ctt > 0 )
		{
			ret = pthread_getcpuclockid( pthread_self(), &clt );

			if ( ret != 0 )
			{
				UNRESOLVED( ret, "Unable to get cpu-time clock id of the thread" );
			}

			ret = clock_gettime( clt, &tp );

			if ( ret != 0 )
			{
				UNRESOLVED( errno, "Failed to read thread CPU time clock" );
			}

			if ( tp.tv_sec > 0 )
			{
				FAILED( "The thread CPU-time clock was not reset in child\n" );
			}
		}

		/* We're done */
		exit( PTS_PASS );
	}

	/* Parent joins the child */
	ctl = waitpid( child, &status, 0 );

	if ( ctl != child )
	{
		UNRESOLVED( errno, "Waitpid returned the wrong PID" );
	}

	if ( ( !WIFEXITED( status ) ) || ( WEXITSTATUS( status ) != PTS_PASS ) )
	{
		FAILED( "Child exited abnormally" );
	}


	/* Test passed */
#if VERBOSE > 0
	output( "Test passed\n" );

#endif
	PASSED;
}