l3.libnazgul/src/queueLock.c

#include "libnazgul.h"

int queueLock(msgSpaceId externId,int queueIdx){
  sem_t * queueSemFd;
  msgQueueSemId queueSemId;

  msgQueueSemIdIntern(queueSemId,externId);
  queueSemFd=sem_open(queueSemId,O_CREAT|O_EXCL,SEM_DEFAULT_MODE,1);
  if(queueSemFd==SEM_FAILED){
	NZG_ERROR("sem_open",queueSemId);
	goto ERROR;
  }

  if(sem_wait(queueSemFd)==-1){
	NZG_ERROR("sem_wait",queueSemId);
	goto ERROR;
  }

  sem_close(queueSemFd);

  return 0;
ERROR:
  return -1; 
}