Add a way to know if an IPC component is initialized or not

include/ipc.h

 
 #define PyFCGI_SEM(i) (PyFCGI_conf.sems[i])
 
+#define PyFCGI_SEM_OPEN(i) (PyFCGI_conf.sems[i].sem != NULL)
+
 /**@defgroup IPC_flags IPC component flags
  * @ingroup IPC
  * @brief For IPC component selection */
 /**@brief Worker state semaphore
  * @ingroup IPC_flags */
 #define IPC_WSTATE 2
-/**@brief Worker state semaphore
+/**@brief Request counter semaphore
  * @ingroup IPC_flags */
 #define IPC_WREQS 4
-/**@brief Worker state semaphore
+/**@brief Monitor <-> pool semaphore
  * @ingroup IPC_flags */
 #define IPC_SEMST 8
-/**@brief Worker state semaphore
+/**@brief Monitor <-> pool SHM flag
  * @ingroup IPC_flags */
 #define IPC_SHMST 16
 

src/ipc.c

 	{
 		if(flag & semflg[i])
 		{
-			continue;
-			PyFCGI_conf.context.ipc_flag ^= semflg[i];
 			if(sem_close(PyFCGI_SEM(i).sem) < 0)
 			{
 				err = errno;
 					strerror(err));
 				PyFCGI_SEM(i).sem = NULL;
 			}
+			PyFCGI_SEM(i).sem = NULL;
 		}
 	}
 	if(flag & IPC_SHMST)
 					strerror(err));
 				res = -1;
 			}
+			PyFCGI_SEM(i).sem = NULL;
 		}
 	}
 	if(flag & IPC_SHMST)