#include <aio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>

#define BUFSIZE 2500

int main()
{

        int ret;
        struct aiocb aioinfo;
        int fd = open( "pthreadex.c", O_RDONLY );
        if (fd < 0) perror("open");

        /**** In case you prefer fopen
        FILE *f = fopen("pthreadex.c","r");
        if (f == NULL) perror("fopen");
        int fd = fileno(f);
        */


        /* Zero out the aiocb structure (recommended) */
        bzero( (char *)&aioinfo, sizeof(struct aiocb) );

        /* Allocate a data buffer for the aiocb request */
        aioinfo.aio_buf = malloc(BUFSIZE+1);
        if (!aioinfo.aio_buf) perror("malloc");

        /* Initialize the necessary fields in the aiocb */
        aioinfo.aio_fildes = fd;
        aioinfo.aio_nbytes = BUFSIZE;
        aioinfo.aio_offset = 0;

        ret = aio_read( &aioinfo );
        if (ret < 0) perror("aio_read");

        //you could do other stuff here. The read is in progress.

        uint64_t count =0;
        while ( aio_error( &aioinfo ) == EINPROGRESS ) {count++; }

        printf("Counted to %lu while waiting\n",count);
        if ((ret = aio_return( &aioinfo )) > 0) {
                printf("Got %d bytes:\n",ret);

                printf("Bytes: %s\n",(char *)aioinfo.aio_buf);
        } else {
                printf("READ FAILED!!!\n");
        }
        //close(fd);
}