Multithread error

[melonQheadQsheep]

I typed the following code into CodeLite (Linux) and it gave me the error below:

:18:62: error: invalid conversion from ‘void* (*)()’ to ‘void* (*)(void*)’ [-fpermissive]

//CODE HERE///

#include <stdio.h>
#include <pthread.h>
#include <iostream>
#include <stdlib.h>
using namespace std;

void *functionC();
pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
int counter = 0;

main()
{
int rc1, rc2;
pthread_t thread1, thread2;

/* Create independent threads each of which will execute functionC */

if( (rc1=pthread_create( &thread1, NULL, &functionC, NULL)) )
{
printf("Thread creation failed: %d\n", rc1);
}

if( (rc2=pthread_create( &thread2, NULL, &functionC, NULL)) )
{
printf("Thread creation failed: %d\n", rc2);
}

/* Wait till threads are complete before main continues. Unless we */
/* wait we run the risk of executing an exit which will terminate */
/* the process and all threads before the threads have completed. */

pthread_join( thread1, NULL);
pthread_join( thread2, NULL);

exit(0);
}

void *functionC()
{
pthread_mutex_lock( &mutex1 );
counter++;
printf("Counter value: %d\n",counter);
pthread_mutex_unlock( &mutex1 );
}

Could anyone please explain to me why i got this error and how to correct it

Thankz for your answers and comments

[rmsharkey]

The function prototype takes a void* parameter.

[melonQheadQsheep]

So how exactly should fix this problem

[andywestken]

rmsharkey has given you an (the!) exact answer!

Your function needs to match the prototype!!

[kbw]

So how exactly should fix this problem

Your thread function should be:

void functionC(void*)
{
    //...
}

http://pubs.opengroup.org/onlinepubs/007908799/xsh/pthread_create.html