/*
 * 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:
 *
 * When the abstime parameter is invalid, 
 * the function must return EINVAL and 
 * the mutex state must not have changed during the call.

 * The steps are:
 *  -> parent (for each mutex type and each condvar options, across threads or processes)
 *     -> locks the mutex m
 *     -> sets ctrl = 0
 *     -> creates a bunch of children, which:
 *        -> lock the mutex m
 *        -> if ctrl == 0, test has failed
 *        -> unlock the mutex then exit
 *     -> calls pthread_cond_timedwait with invalid values (nsec > 999999999)
 *     -> sets ctrl = non-zero value
 *     -> unlocks the mutex m
 */
 
 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
 #define _POSIX_C_SOURCE 200112L
 
 /* We need the XSI extention for the mutex attributes
   and the mkstemp() routine */
#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 <sys/wait.h>
 #include <sys/mman.h>
 #include <string.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

#define NCHILDREN (20)

#ifndef WITHOUT_ALTCLK
#define USE_ALTCLK  /* make tests with MONOTONIC CLOCK if supported */
#endif

/********************************************************************************************/
/***********************************    Test case   *****************************************/
/********************************************************************************************/
#ifndef WITHOUT_XOPEN

typedef struct 
{
	pthread_mutex_t mtx;
	int ctrl;   /* Control value */
	int gotit;  /* Thread locked the mutex while ctrl == 0 */
	int status; /* error code */
} testdata_t;

struct _scenar
{
	int m_type; /* Mutex type to use */
	int mc_pshared; /* 0: mutex and cond are process-private (default) ~ !0: Both are process-shared, if supported */
	int c_clock; /* 0: cond uses the default clock. ~ !0: Cond uses monotonic clock, if supported. */
	int fork; /* 0: Test between threads. ~ !0: Test across processes, if supported (mmap) */
	char * descr; /* Case description */
}
scenarii[] =
{
	 {PTHREAD_MUTEX_DEFAULT,    0, 0, 0, "Default mutex"}
	,{PTHREAD_MUTEX_NORMAL,     0, 0, 0, "Normal mutex"}
	,{PTHREAD_MUTEX_ERRORCHECK, 0, 0, 0, "Errorcheck mutex"}
	,{PTHREAD_MUTEX_RECURSIVE,  0, 0, 0, "Recursive mutex"}

	,{PTHREAD_MUTEX_DEFAULT,    1, 0, 0, "PShared default mutex"}
	,{PTHREAD_MUTEX_NORMAL,     1, 0, 0, "Pshared normal mutex"}
	,{PTHREAD_MUTEX_ERRORCHECK, 1, 0, 0, "Pshared errorcheck mutex"}
	,{PTHREAD_MUTEX_RECURSIVE,  1, 0, 0, "Pshared recursive mutex"}

	,{PTHREAD_MUTEX_DEFAULT,    1, 0, 1, "Pshared default mutex across processes"}
	,{PTHREAD_MUTEX_NORMAL,     1, 0, 1, "Pshared normal mutex across processes"}
	,{PTHREAD_MUTEX_ERRORCHECK, 1, 0, 1, "Pshared errorcheck mutex across processes"}
	,{PTHREAD_MUTEX_RECURSIVE,  1, 0, 1, "Pshared recursive mutex across processes"}

#ifdef USE_ALTCLK
	,{PTHREAD_MUTEX_DEFAULT,    1, 1, 1, "Pshared default mutex and alt clock condvar across processes"}
	,{PTHREAD_MUTEX_NORMAL,     1, 1, 1, "Pshared normal mutex and alt clock condvar across processes"}
	,{PTHREAD_MUTEX_ERRORCHECK, 1, 1, 1, "Pshared errorcheck mutex and alt clock condvar across processes"}
	,{PTHREAD_MUTEX_RECURSIVE,  1, 1, 1, "Pshared recursive mutex and alt clock condvar across processes"}

	,{PTHREAD_MUTEX_DEFAULT,    0, 1, 0, "Default mutex and alt clock condvar"}
	,{PTHREAD_MUTEX_NORMAL,     0, 1, 0, "Normal mutex and alt clock condvar"}
	,{PTHREAD_MUTEX_ERRORCHECK, 0, 1, 0, "Errorcheck mutex and alt clock condvar"}
	,{PTHREAD_MUTEX_RECURSIVE,  0, 1, 0, "Recursive mutex and alt clock condvar"}

	,{PTHREAD_MUTEX_DEFAULT,    1, 1, 0, "PShared default mutex and alt clock condvar"}
	,{PTHREAD_MUTEX_NORMAL,     1, 1, 0, "Pshared normal mutex and alt clock condvar"}
	,{PTHREAD_MUTEX_ERRORCHECK, 1, 1, 0, "Pshared errorcheck mutex and alt clock condvar"}
	,{PTHREAD_MUTEX_RECURSIVE,  1, 1, 0, "Pshared recursive mutex and alt clock condvar"}
#endif
};

struct {
	long sec_val;          /* Value for seconds */
	short sec_is_offset;   /* Seconds value is added to current time or is absolute */
	long nsec_val;         /* Value for nanoseconds */
	short nsec_is_offset;  /* Nanoseconds value is added to current time or is absolute */
}
junks_ts[]={
	 {          -2 , 1,  1000000000, 1 }
	,{          -2 , 1,          -1, 0 }
	,{          -3 , 1,  2000000000, 0 }
};


void * tf(void * arg)
{
	int ret=0;
	
	testdata_t * td = (testdata_t *)arg;
	
	/* Lock the mutex */
	ret = pthread_mutex_lock(&(td->mtx));
	if (ret != 0)
	{
		td->status = ret;
		UNRESOLVED(ret, "[child] Unable to lock the mutex");
	}
	
	/* Checks whether the parent release the lock inside the timedwait function */
	if (td->ctrl == 0)
		td->gotit += 1;
	
	/* Unlock and exit */
	ret = pthread_mutex_unlock(&(td->mtx));
	if (ret != 0)
	{
		td->status=ret;
		UNRESOLVED(ret, "[child] Failed to unlock the mutex.");
	}
	return NULL;
}


int main(int argc, char * argv[])
{
	int ret, i, j, k;
	pthread_mutexattr_t ma;
	pthread_condattr_t ca;
	pthread_cond_t cnd;
	clockid_t cid = CLOCK_REALTIME;
	struct timespec ts, ts_junk;
	
	testdata_t * td;
	testdata_t alternativ;
	
	int do_fork;
	
	pid_t child_pr[NCHILDREN], chkpid;
	int status;
	pthread_t child_th[NCHILDREN];
	
	long pshared, monotonic, cs, mf;
	
	output_init();
	pshared = sysconf(_SC_THREAD_PROCESS_SHARED);
	cs = sysconf(_SC_CLOCK_SELECTION);
	monotonic = sysconf(_SC_MONOTONIC_CLOCK);
	mf =sysconf(_SC_MAPPED_FILES);
	
	#if VERBOSE > 0
	output("Test starting\n");
	output("System abilities:\n");
	output(" TPS : %li\n", pshared);
	output(" CS  : %li\n", cs);
	output(" MON : %li\n", monotonic);
	output(" MF  : %li\n", mf);
	if ((mf < 0) || (pshared < 0))
		output("Process-shared attributes won't be tested\n");
	if ((cs < 0) || (monotonic < 0))
		output("Alternative clock won't be tested\n");
	#endif
	
	/* We are not interested in testing the clock if we have no other clock available.. */
	if (monotonic < 0)
		cs = -1;
	
#ifndef USE_ALTCLK
	if (cs > 0)
		output("Implementation supports the MONOTONIC CLOCK but option is disabled in test.\n");
#endif
	
/**********
 * Allocate space for the testdata structure
 */
	if (mf < 0)
	{
		/* Cannot mmap a file, we use an alternative method */
		td = &alternativ;
		pshared = -1; /* We won't do this testing anyway */
		#if VERBOSE > 0
		output("Testdata allocated in the process memory.\n");
		#endif
	}
	else
	{
		/* We will place the test data in a mmaped file */
		char filename[] = "/tmp/cond_timedwait_2-4-XXXXXX";
		size_t sz;
		void * mmaped;
		int fd;
		char * tmp;
		
		/* We now create the temp files */
		fd = mkstemp(filename);
		if (fd == -1)
		{ UNRESOLVED(errno, "Temporary file could not be created"); }
		
		/* and make sure the file will be deleted when closed */
		unlink(filename);
		
		#if VERBOSE > 1
		output("Temp file created (%s).\n", filename);
		#endif
		
		sz= (size_t)sysconf(_SC_PAGESIZE);
		
		tmp = calloc(1, sz);
		if (tmp == NULL)
		{ UNRESOLVED(errno, "Memory allocation failed"); }
		
		/* Write the data to the file.  */
		if (write (fd, tmp, sz) != (ssize_t) sz)
		{ UNRESOLVED(sz, "Writting to the file failed"); }
		
		free(tmp);
		
		/* Now we can map the file in memory */
		mmaped = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
		if (mmaped == MAP_FAILED)
		{ UNRESOLVED(errno, "mmap failed"); }
		
		td = (testdata_t *) mmaped;
		
		/* Our datatest structure is now in shared memory */
		#if VERBOSE > 1
		output("Testdata allocated in shared memory.\n");
		#endif
	}
	
	
/**********
 * For each test scenario, initialize the attributes and other variables.
 * Do the whole thing for each time to test.
 */
	for ( i=0; i< (sizeof(scenarii) / sizeof(scenarii[0])); i++)
	{
		for ( j=0; j< (sizeof(junks_ts) / sizeof(junks_ts[0])); j++)
		{
			#if VERBOSE > 1
			output("[parent] Preparing attributes for: %s\n", scenarii[i].descr);
			#endif
			/* set / reset everything */
			do_fork=0;
			ret = pthread_mutexattr_init(&ma);
			if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to initialize the mutex attribute object");  }
			ret = pthread_condattr_init(&ca);
			if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to initialize the cond attribute object");  }
			
			/* Set the mutex type */
			ret = pthread_mutexattr_settype(&ma, scenarii[i].m_type);
			if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to set mutex type");  }
			#if VERBOSE > 1
			output("[parent] Mutex type : %i\n", scenarii[i].m_type);
			#endif
			
			/* Set the pshared attributes, if supported */
			if ((pshared > 0) && (scenarii[i].mc_pshared != 0))
			{
				ret = pthread_mutexattr_setpshared(&ma, PTHREAD_PROCESS_SHARED);
				if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to set the mutex process-shared");  }
				ret = pthread_condattr_setpshared(&ca, PTHREAD_PROCESS_SHARED);
				if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to set the cond var process-shared");  }
				#if VERBOSE > 1
				output("[parent] Mutex & cond are process-shared\n");
				#endif
			}
			#if VERBOSE > 1
			else {
				output("[parent] Mutex & cond are process-private\n");
			}
			#endif
			
			/* Set the alternative clock, if supported */
			#ifdef USE_ALTCLK
			if ((cs > 0) && (scenarii[i].c_clock != 0))
			{
				ret = pthread_condattr_setclock(&ca, CLOCK_MONOTONIC);
				if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to set the monotonic clock for the cond");  }
				#if VERBOSE > 1
				output("[parent] Cond uses the Monotonic clock\n");
				#endif
			}
			#if VERBOSE > 1
			else {
				output("[parent] Cond uses the default clock\n");
			}
			#endif
			ret = pthread_condattr_getclock(&ca, &cid);
			if (ret != 0)  {  UNRESOLVED(ret, "Unable to get clock from cond attr");  }
			#endif
			
			/* Tell whether the test will be across processes */
			if ((pshared > 0) && (scenarii[i].fork != 0))
			{
				do_fork = 1;
				#if VERBOSE > 1
				output("[parent] Child will be a new process\n");
				#endif
			}
			#if VERBOSE > 1
			else {
				output("[parent] Child will be a new thread\n");
			}
			#endif
	
			/* initialize the condvar */
			ret = pthread_cond_init(&cnd, &ca);
			if (ret != 0)
			{  UNRESOLVED(ret, "[parent] Cond init failed");  }
			
			
/**********
 * Initialize the testdata_t structure with the previously defined attributes 
 */
			/* Initialize the mutex */
			ret = pthread_mutex_init(&(td->mtx), &ma);
			if (ret != 0)
			{  UNRESOLVED(ret, "[parent] Mutex init failed");  }
			
			/* Initialize the other datas from the test structure */
			td->ctrl=0;
			td->gotit=0;
			td->status=0;
			
/**********
 * Proceed to the actual testing 
 */
			/* Lock the mutex before creating children */
			ret = pthread_mutex_lock(&(td->mtx));
			if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to lock the mutex");  }
			
			/* Create the children */
			if (do_fork != 0)
			{
				/* We are testing across processes */
				for (k=0; k<NCHILDREN; k++)
				{
					child_pr[k] = fork();
					if (child_pr[k] == -1)
					{  UNRESOLVED(errno, "[parent] Fork failed");  }
					
					if (child_pr[k] == 0)
					{
						#if VERBOSE > 3
						output("[child] Child process %i starting...\n", k);
						#endif
						
						if (tf((void *)td) != NULL)
						{
							UNRESOLVED( -1, "[child] Got an unexpected return value from test function");
						}
						else
						{
							/* We cannot use the PASSED macro here since it would terminate the output */
							exit (0);
						}
					}
				}
				/* Only the parent process goes further */
			}
			else /* do_fork == 0 */
			{
				/* We are testing across two threads */
				for (k=0; k<NCHILDREN; k++)
				{
					ret = pthread_create(&child_th[k], NULL, tf, td);
					if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to create the child thread.");  }
				}
			}
			
			/* Children are now running and trying to lock the mutex.*/
			
			ret = clock_gettime(cid, &ts);
			if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to read clock");  }
			
			/* Do the junk timedwaits */
			ts_junk.tv_sec = junks_ts[j].sec_val + (junks_ts[j].sec_is_offset?ts.tv_sec:0) ;
			ts_junk.tv_nsec = junks_ts[j].nsec_val + (junks_ts[j].nsec_is_offset?ts.tv_nsec:0) ;
			
			#if VERBOSE > 2
			output("TS: s = %s%li ; ns = %s%li\n", 
				junks_ts[j].sec_is_offset?"n + ":" ", 
				junks_ts[j].sec_val, 
				junks_ts[j].nsec_is_offset?"n + ":" ", 
				junks_ts[j].nsec_val);
			output("Now is: %i.%09li\n", ts.tv_sec, ts.tv_nsec);	
			output("Junk is: %i.%09li\n", ts_junk.tv_sec, ts_junk.tv_nsec);
			#endif
			
			do {
				ret = pthread_cond_timedwait(&cnd, &(td->mtx), &ts_junk);
			} while (ret == 0);
			#if VERBOSE > 2
			output("timedwait returns %d (%s) - gotit = %d\n", ret, strerror(ret), td->gotit);
			#endif
			
			/* check that when EINVAL is returned, the mutex has not been released */
			if (ret == EINVAL)
			{
				if (td->gotit != 0)
				{
					FAILED("The mutex was released when an invalid timestamp was detected in the function");
				}
			#if VERBOSE > 0
			} else {
				output("Warning, struct timespec with tv_sec = %i and tv_nsec = %li was not invalid\n", ts_junk.tv_sec, ts_junk.tv_nsec);
			}
			#endif
			
			/* Finally unlock the mutex */
			td->ctrl = 1;
			ret = pthread_mutex_unlock(&(td->mtx));
			if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to unlock the mutex");  }
			
			/* Wait for the child to terminate */
			if (do_fork != 0)
			{
				/* We were testing across processes */
				ret = 0;
				for (k=0; k< NCHILDREN; k++)
				{
					chkpid = waitpid(child_pr[k], &status, 0);
					if (chkpid != child_pr[k])
					{
						output("Expected pid: %i. Got %i\n", (int)child_pr[k], (int)chkpid);
						UNRESOLVED(errno, "Waitpid failed"); 
					}
					if (WIFSIGNALED(status))
					{ 
						output("Child process killed with signal %d\n",WTERMSIG(status)); 
						UNRESOLVED( -1 , "Child process was killed"); 
					}
					
					if (WIFEXITED(status))
					{
						ret |= WEXITSTATUS(status);
					}
					else
					{
						UNRESOLVED( -1, "Child process was neither killed nor exited");
					}
				}
				if (ret != 0)
				{
					exit(ret); /* Output has already been closed in child */
				}
	
			}
			else /* child was a thread */
			{
				for (k=0; k<NCHILDREN; k++)
				{
					ret = pthread_join(child_th[k], NULL);
					if (ret != 0)  {  UNRESOLVED(ret, "[parent] Unable to join the thread");  }
				}
			}
	
/**********
 * Destroy the data 
 */
			ret = pthread_cond_destroy(&cnd);
			if (ret != 0)  {  UNRESOLVED(ret, "Failed to destroy the cond var");  }
			
			ret = pthread_mutex_destroy(&(td->mtx));
			if (ret != 0)  {  UNRESOLVED(ret, "Failed to destroy the mutex");  }
			
			ret = pthread_condattr_destroy(&ca);
			if (ret != 0)  {  UNRESOLVED(ret, "Failed to destroy the cond var attribute object");  }
			
			ret = pthread_mutexattr_destroy(&ma);
			if (ret != 0)  {  UNRESOLVED(ret, "Failed to destroy the mutex attribute object");  }
			
		} /* Proceed to the next junk timedwait value */
	}  /* Proceed to the next scenario */
	
	#if VERBOSE > 0
	output("Test passed\n");
	#endif

	PASSED;
}

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