#include "common.h"
#include "svshm.h"
#include "squeue.h"

using namespace std;

void sigint_handler(int sig) {
  mm_deinit();
  exit(0);

}
int main(int argc, char *argv[])
{
  int semid;

  void *shmp;
  signal(SIGINT,  sigint_handler);
  /* Get IDs for semaphore set and shared memory created by writer */

  semid = semget(SEM_KEY, 0, 0);
  if (semid == -1)
    err_exit(errno, "semget");

  /*mm_init(sizeof(deque<string, myallocator::Allocator<string> >), &shmp);*/
  /*deque<string, myallocator::Allocator<string> > *queue = (deque<string, myallocator::Allocator<string> > *) shmp;*/

  SQueue<struct Item> *queue;
 
  int first = mm_init(sizeof(SQueue<struct Item>), &shmp);
  
  if (first == 1)
    queue = new(shmp) SQueue<struct Item>;
  else
    queue = (SQueue<struct Item> *) shmp;
  /* Transfer blocks of data from shared memory to stdout */
   
  while(1) {
    if (reserveSem(semid, READ_SEM) == -1)          /* Wait for our turn */
      err_exit(errno, "reserveSem");
    std::cout << "====queue size=" << queue->size() << ", content as following===\n";
    for (size_t i = 0; i < queue->size(); ++i)
    {
      // cout <<"v ptr="<< &((*v)[i])<<",value=" << (*v)[i] << endl;
      struct Item & item = (*queue)[i];
      cout << item.pic << " " << item.info << endl;
    }
    //std::cout << queue->front() << "\n";

    if (releaseSem(semid, WRITE_SEM) == -1)         /* Give writer a turn */
      err_exit(errno, "releaseSem");
  }

  /*if (shmdt(shmp) == -1)*/
  /*err_exit(errno, "shmdt");*/

  /* Give writer one more turn, so it can clean up */

  if (releaseSem(semid, WRITE_SEM) == -1)
    err_exit(errno, "releaseSem");

  mm_deinit();
  exit(EXIT_SUCCESS);
}