memory leak in multithreaded c++ program

[Hawk]

Hi
I wrote a multithreaded program using openssl
But with every connection it grows up about 8kb
I think I freed all SSL* and SSL_CTX* I used

I used this functions to make my program threadsafe:
Perhaps anyone can give me a hint if there is an error?
With best regards
Stephan

void CRYPTO_thread_setup(void)
{
        debugmsg("[CRYPTO_thread_setup] start");
        int i;

        lock_cs = (pthread_mutex_t*)OPENSSL_malloc(CRYPTO_num_locks() *
sizeof(pthread_mutex_t));
        lock_count = (long *)OPENSSL_malloc(CRYPTO_num_locks() *
sizeof(long));
        for (i=0; i<CRYPTO_num_locks(); i++)
        {
                lock_count[i]=0;
                pthread_mutex_init(&(lock_cs[i]),NULL);
        }

        CRYPTO_set_id_callback((unsigned long (*)())pthreads_thread_id);
        CRYPTO_set_locking_callback(pthreads_locking_callback);
        debugmsg("[CRYPTO_thread_setup] end");
}

void thread_cleanup(void)
{
        debugmsg("[thread_cleanup] start");
        int i;

        CRYPTO_set_locking_callback(NULL);
        for (i=0; i<CRYPTO_num_locks(); i++)
        {
                pthread_mutex_destroy(&(lock_cs[i]));
        }
        OPENSSL_free(lock_cs);
        OPENSSL_free(lock_count);
        debugmsg("[thread_cleanup] end");
}

void pthreads_locking_callback(int mode, int type, const char *file,
     int line)
{
        //debugmsg("[pthreads_locking_callback] start");
        #if 0
        fprintf(stderr,"thread=%4d mode=%s lock=%s %s:%d\n",
        CRYPTO_thread_id(),
        (mode&CRYPTO_LOCK)?"l":"u",
        (type&CRYPTO_READ)?"r":"w",file,line);
        #endif
        #if 0
        if (CRYPTO_LOCK_SSL_CERT == type)
        fprintf(stderr,"(t,m,f,l) %ld %d %s %d\n",
        CRYPTO_thread_id(),
        mode,file,line);
        #endif
        if (mode & CRYPTO_LOCK)
        {
                pthread_mutex_lock(&(lock_cs[type]));
                lock_count[type]++;
        }
        else
        {
                pthread_mutex_unlock(&(lock_cs[type]));
        }
        //debugmsg("[pthreads_locking_callback] end");
}

unsigned long pthreads_thread_id(void)
{
        unsigned long ret;

        ret=(unsigned long)pthread_self();
        return(ret);
}

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