#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <string.h>
#include <sys/time.h>

#define MAIN_THPOOL_NUM     4
#define WHILE_FOR_NUM       10
#define MALLOC_SIZE         4096

int     g_done[MAIN_THPOOL_NUM];

pthread_t pthreads[MAIN_THPOOL_NUM];

void sleepmsec(long msec)
{
    struct timeval stTimeVal;

    stTimeVal.tv_sec = msec / 1000;
    msec -= stTimeVal.tv_sec * 1000;
    stTimeVal.tv_usec = msec * 1000;

    select(0, 0, 0, 0, &stTimeVal);
}

void alloc_free(int ri)
{
    void    *test_array[WHILE_FOR_NUM];
    int     i;

    for (i = 0; i < WHILE_FOR_NUM; i++) {
        test_array[i] = NULL;
        test_array[i] = malloc(MALLOC_SIZE);

        if (test_array[i]) {
            memset(test_array[i],i,MALLOC_SIZE);
        } else {
            printf("alloc error %d\n",ri);
        }
    }

    for(i=0; i<WHILE_FOR_NUM; i++) {
        if (test_array[i]) {
            free(test_array[i]);
            test_array[i]=NULL;
        }
    }
}

void *polling_task(void *arg)
{
    void    *test_array[WHILE_FOR_NUM];
    int     i = *(int*)arg;

    printf("i=%d\n",i);

    while ( 1 ) {
        alloc_free(i);
        sleepmsec(10);
    }

    return NULL;
}

int main(int argc, char *argv[])
{
    int     i;
    int     status[MAIN_THPOOL_NUM];
    //int     cnt = 1000000;

    for (i = 0; i < MAIN_THPOOL_NUM; i++) {
        pthread_create(&pthreads[i], NULL, (void *)polling_task, &i);
        sleepmsec(1);
    }

    while (1) {
        sleepmsec(10);
    }

    return 0;
}