/*
 * 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 file is a stress test for the function pthread_exit.
 *
 * It aims to check that:
 *  -> when the threads are joinable, pthread_join always retrieve the
 *     correct value.
 *  -> pthread_exit() frees all the resources used by the threads.
 *
 * The second assertion is implicitly checked by monitoring the system
 * while the stress test is running.
 *
 */
 
 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
 #define _POSIX_C_SOURCE 200112L
 
 /* We need the XSI extention for some routines */
#ifndef WITHOUT_XOPEN
 #define _XOPEN_SOURCE	600
#endif
/********************************************************************************************/
/****************************** standard includes *****************************************/
/********************************************************************************************/
 #include <pthread.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h> 
 #include <unistd.h>

 #include <errno.h>
 #include <signal.h>
 #include <semaphore.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 SCALABILITY_FACTOR
#define SCALABILITY_FACTOR 1
#endif
#ifndef VERBOSE
#define VERBOSE 1
#endif

#define FACTOR 5

/* This testcase needs the XSI features */
#ifndef WITHOUT_XOPEN
/********************************************************************************************/
/***********************************    Test case   *****************************************/
/********************************************************************************************/

#include "threads_scenarii.c"

/* This file will define the following objects:
 * scenarii: array of struct __scenario type.
 * NSCENAR : macro giving the total # of scenarii
 * scenar_init(): function to call before use the scenarii array.
 * scenar_fini(): function to call after end of use of the scenarii array.
 */

/********************************************************************************************/
/***********************************    Real Test   *****************************************/
/********************************************************************************************/

char do_it=1;
long long iterations=0;

/* Handler for user request to terminate */
void sighdl(int sig)
{
	/* do_it = 0 */
	do { do_it = 0; }
	while (do_it);
}


/* Cleanup handler to make sure the thread is exiting */
void cleanup(void * arg)
{
	int ret = 0;
	sem_t * sem = (sem_t *) arg;
	
	/* Signal we're done (especially in case of a detached thread) */
	do { ret = sem_post(sem); }
	while ((ret == -1) && (errno == EINTR));
	if (ret == -1)  {  UNRESOLVED(errno, "Failed to wait for the semaphore");  }
}


/* Thread routine */
void * threaded(void * arg)
{
	pthread_cleanup_push(cleanup, &scenarii[sc].sem);
	
	pthread_exit(arg);
	FAILED("the pthread_exit routine returned");
	
	pthread_cleanup_pop(1);
	
	return NULL; /* For the sake of compiler */
}

/* main routine */
int main(int argc, char * argv[])
{
	int ret, i;
	void * rval;
	struct sigaction sa;
	
	pthread_t threads[NSCENAR * SCALABILITY_FACTOR * FACTOR];
	int rets[NSCENAR * SCALABILITY_FACTOR * FACTOR];
	
 	/* Initialize output */
	output_init();
	
	/* Initialize scenarii table */
	scenar_init();
	
	/* Register the signal handler for SIGUSR1 */
	sigemptyset (&sa.sa_mask);
	sa.sa_flags = 0;
	sa.sa_handler = sighdl;
	if ((ret = sigaction (SIGUSR1, &sa, NULL)))
	{ UNRESOLVED(ret, "Unable to register signal handler"); }
	if ((ret = sigaction (SIGALRM, &sa, NULL)))
	{ UNRESOLVED(ret, "Unable to register signal handler"); }
	#if VERBOSE > 1
	output("[parent] Signal handler registered\n");
	#endif
	
	while (do_it)
	{
		/* Create all the threads */
		for (i=0; i<SCALABILITY_FACTOR * FACTOR; i++)
		{
			for (sc=0; sc<NSCENAR; sc++)
			{
				/* Skip the alternative stack threads */
				if (scenarii[sc].altstack != 0)
					continue;
				
				rets[i*NSCENAR + sc] = pthread_create(&threads[i*NSCENAR + sc], &scenarii[sc].ta, threaded, &threads[i*NSCENAR + sc]);
				switch (scenarii[sc].result)
				{
					case 0: /* Operation was expected to succeed */
						if (rets[i*NSCENAR + sc] != 0)  {  UNRESOLVED(rets[i*NSCENAR + sc], "Failed to create this thread");  }
						break;
					
					case 1: /* Operation was expected to fail */
						if (rets[i*NSCENAR + sc] == 0)  {  UNRESOLVED(-1, "An error was expected but the thread creation succeeded");  }
						break;
					
					case 2: /* We did not know the expected result */
					default:
						#if VERBOSE > 5
						if (rets[i*NSCENAR + sc] == 0)
							{ output("Thread has been created successfully for this scenario\n"); }
						else
							{ output("Thread creation failed with the error: %s\n", strerror(rets[i*NSCENAR + sc])); }
						#endif
						;
				}
				if (rets[i*NSCENAR + sc] == 0)
				{
					/* Just wait for the thread to terminate */
					do { ret = sem_wait(&scenarii[sc].sem); }
					while ((ret == -1) && (errno == EINTR));
					if (ret == -1)  {  UNRESOLVED(errno, "Failed to wait for the semaphore");  }
				}
			}
		}
		
		/* Join all the joinable threads and check the value */
		for (i=0; i<SCALABILITY_FACTOR * FACTOR; i++)
		{
			for (sc=0; sc<NSCENAR; sc++)
			{
				if ((scenarii[sc].altstack == 0) && (scenarii[sc].detached == 0) && (rets[i*NSCENAR + sc] == 0))
				{
					ret = pthread_join(threads[i*NSCENAR + sc], &rval);
					if (ret != 0)  {  UNRESOLVED(ret, "Unable to join a thread");  }
					
					if (rval !=  (void *)&threads[i*NSCENAR + sc])
					{
						output("arg: %p -- got %p -- NULL=%p\n", &threads[i*NSCENAR + sc], rval, NULL);
						FAILED("The retrieved error value is corrupted");
					}
				}
			}
		}
		
		iterations++;
	}
	
	/* Destroy scenarii attributes */
	scenar_fini();
	
	/* Test passed */
	output("pthread_exit stress test PASSED -- %llu iterations\n",iterations);
	PASSED;
}


#else /* WITHOUT_XOPEN */
int main(int argc, char * argv[])
{
	output_init();
	UNTESTED("This test requires XSI features");
}
#endif