#include "libnazgul.h"
#include "ids.h"

void * msgQueueOpen(msgQueueId queueId){
  int queueFd;
  void * queueAddr;

  queueFd=shm_open(queueId,O_RDWR,SHM_DEFAULT_MODE);
  if (queueFd == -1 ) {
	NZG_ERROR("shm_open : msgQueue open",queueId);
	goto ERROR;
  }

  queueAddr=mmap(NULL,
	  sizeof(msgQueue),
	  PROT_READ|PROT_WRITE,
	  MAP_SHARED,
	  queueFd,
	  0);
  if( queueAddr == MAP_FAILED ) {
	NZG_ERROR("mmap",queueId);
	goto ERROR;
  }

  close(queueFd);
  return queueAddr; 
ERROR: 
  return NULL;
}