//gcc bug28138.c -g -o bug28138 -L/home/sbester/server/5.0/mysql-5.0.38-linux-i686/lib -I/home/sbester/server/5.0/mysql-5.0.38-linux-i686/include   -lmysqlclient_r -lz -lpthread

/*This is generated code!*/

/*section: includes*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <mysql.h>
#include <pthread.h>

#define TESTTIME (6000)

#define NUMTHREADS (5)

#define DATASIZE (16*1024*1024)

/*section: globals*/
char host[]="127.0.0.1";
char username[]="root";
char password[]="";
char database[]="test";
int port=3306;
pthread_t pthreads[NUMTHREADS];
int threaddone=0;
char *databucket=NULL;

/*section: function declarations*/
void *worker_thread(void *arg);
MYSQL *db_connect(MYSQL *dbc);
int write_string(char *buf,const int minlen,const int maxlen,const int flag);

/*section: functions*/
int db_query(MYSQL *dbc,char *sql,int showresults)
{
	int res=0;
	MYSQL_RES *r=NULL;
	MYSQL_ROW w;
	MYSQL_FIELD *field=NULL;
	int i=0,moreresult=0;
	if(NULL == dbc) return 0;
	res = mysql_query(dbc,sql);
	if(res != 0 && showresults > 0)
	{
		printf("query failed '%s' : %d (%s)\n",sql,mysql_errno(dbc),mysql_error(dbc));
		return 0;
	}

	do
	{
		r = mysql_store_result(dbc);
		if(r)
		{
			unsigned int numfields = mysql_num_fields(r);
			unsigned int numrows=mysql_num_rows(r);
			while((field = mysql_fetch_field(r)))
			{
					//print metadata information about each field
					if(showresults > 1)
					{
						printf("%s	",field->name);
					}
			}
			if(showresults > 1)
			{
				printf("\n------------------------------------\n");
			}

			while ((w = mysql_fetch_row(r)))
			{
				for(i = 0; i < numfields; i++)
				{
					//print each field here
					if(showresults > 1)
					{
						printf("%s\t",w[i]);
					}
				}

				if(showresults > 1)
				{
						printf("\n");
				}
			}
			if(showresults > 1)
			{
				printf("\n");
			}
			mysql_free_result(r);
		}
		else //no rows returned. was it a select?
		{
			if(mysql_field_count(dbc) > 0 && showresults > 0)
			{
				printf("No results for '%s'.  (%d) - %s\n",sql,mysql_errno(dbc),mysql_error(dbc));
			}
			else //it could have been some insert/update/delete
			{
				//this is successful query
			}
		}
		moreresult=mysql_next_result(dbc);
		if(moreresult > 0 && showresults > 0)
		{
			printf("mysql_next_result returned %d, mysql error %s, (%d)\n",moreresult,mysql_error(dbc),mysql_errno(dbc));
			break;
		}
	} while (0==moreresult);
}

char* alocmem(const int num)
{
	char *r=calloc(num,1);
	if(NULL == r)
	{
		printf("cannot calloc %d bytes of memory\n",num);
		exit(1);
	}
	return r;
}

int write_string(char *buf,const int minlen,const int maxlen,const int flag)
{
	if(!buf || maxlen==0)
		return 0;
	int lengt=minlen + lrand48() % (maxlen-minlen) - 1;
	int start_lengt = lrand48()%(DATASIZE - lengt - 1);
	if(lengt<0) lengt=0;
	if(start_lengt<0) start_lengt=0;
	memcpy(buf,databucket+start_lengt,lengt);
	buf[lengt]=0;
	return lengt;
}

void *worker_thread(void *arg)
{
	MYSQL *dbc=NULL;
	int cancelstate=0;
	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE,&cancelstate);

	if (!(dbc = mysql_init(NULL)))
	{
		printf("mysql_init\n");
		dbc=NULL;
		goto threadexit;
	}
	else
	{
		if (!mysql_real_connect(dbc,host,username,password,database,port, NULL, CLIENT_FOUND_ROWS|CLIENT_MULTI_STATEMENTS|CLIENT_MULTI_RESULTS))
		{
			printf("mysql_real_connect failed: %s (%d)", mysql_error(dbc),mysql_errno(dbc));
			dbc=NULL;
		}
	}

	unsigned int counter=0;
	char shortquery[1024]={0};
	char *longquery=NULL;
	char *c=NULL;
	while(!threaddone && dbc!=NULL)
	{
	/* printing 6 SQL statements */

					c=shortquery;
					c+=sprintf(c,"%s","set names utf8");
					db_query(dbc,shortquery,1);



			longquery = alocmem(819242);
				for(counter=0;counter<1000;counter++)
				{
					c=longquery;
					c+=sprintf(c,"%s","insert into prefix_test values ('");
					c+=write_string(c,0,409600,0);
					c+=sprintf(c,"%s","')");
					db_query(dbc,longquery,1);
				}
					free(longquery);



					c=shortquery;
					c+=sprintf(c,"%s","check table prefix_test");
					db_query(dbc,shortquery,1);



	}
threadexit:
	mysql_close(dbc);
	mysql_thread_end();
	pthread_exit(0);
}


int main(int argc, const char *argv[])
{
	MYSQL *dbc=NULL;
	int i=0,err=0;

	time_t timestart=0,timenow=0;

	unsigned int counter=0;
	char shortquery[1024]={0};
	char *longquery=NULL;
	char *c=NULL;
	my_init();
	if (!(dbc = mysql_init(NULL)))
	{
		printf("mysql_init\n");
		dbc=NULL;
		goto threadexit;
	}
	else
	{
		if (!mysql_real_connect(dbc,host,username,password,database,port, NULL, CLIENT_FOUND_ROWS|CLIENT_MULTI_STATEMENTS|CLIENT_MULTI_RESULTS))
		{
			printf("mysql_real_connect failed: %s (%d)", mysql_error(dbc),mysql_errno(dbc));
			dbc=NULL;
			goto threadexit;
		}
	}

	printf("running initializations..\n");
	printf("pre-generating %d bytes of random data\n",DATASIZE);
   databucket=calloc(DATASIZE,sizeof(char*));
   if(NULL == databucket)
	{
		printf("error: cannot calloc data buffer.\n");
		exit(1);
	}
	for(i=0;i<DATASIZE-1;i++)
	{
		databucket[i]=0x61+(lrand48()%26);
	}
					c=shortquery;
					c+=sprintf(c,"%s","set global innodb_flush_log_at_trx_commit=0");
					db_query(dbc,shortquery,1);

					c=shortquery;
					c+=sprintf(c,"%s","drop table if exists `prefix_test`");
					db_query(dbc,shortquery,1);

					c=shortquery;
					c+=sprintf(c,"%s","CREATE TABLE `prefix_test` ( `lt` varbinary(4000) NOT NULL, KEY `lt_index`(`lt`(255))) ENGINE=InnoDB");
					db_query(dbc,shortquery,1);

	mysql_close(dbc);

	printf("about to spawn %d threads\n",NUMTHREADS);
	for (i=0;i<NUMTHREADS;i++)
	{
		err=pthread_create(&pthreads[i], NULL, worker_thread, (void *)i);
		if(err!=0)
		{
			printf("error spawning thread %lu, pthread_create returned %lu\n",(unsigned long)i,(unsigned long)err);
		}
	printf(".");
	}
	printf("\n");
	printf("completed spawning new database worker threads\n");

	printf("testcase is now running, so watch for error output\n");

	timestart=time(NULL);
	timenow=time(NULL);
	for(i=0;(timenow-timestart) < TESTTIME;timenow=time(NULL))
	{
		sleep(1);
	}
	threaddone=1;

	printf("waiting for worker threads to finish...\n");

	for (i=0;i<NUMTHREADS;i++)
	{
		pthread_join(pthreads[i], NULL);
	}

	exit(0);
threadexit:
	exit(-1);
}