fix a bug in the unnamed semaphore section that was introduced when I tried to unify the named and unnamed semaphore logic.

ompi/mca/sharedfp/sm/sharedfp_sm.h

@@ -100,9 +100,9 @@ int mca_sharedfp_sm_iwrite (mca_io_ompio_file_t *fh,
 /*--------------------------------------------------------------*
  *Structures and definitions only for this component
  *--------------------------------------------------------------*/
-
+#define  OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES 1
 struct sm_offset{
-    sem_t *mutex;      /* the mutex: a Posix memory-based unnamed semaphore */
+    sem_t mutex;      /* the mutex: a Posix memory-based unnamed semaphore */
     long long offset;  /* and the shared file pointer offset */
 };
 

ompi/mca/sharedfp/sm/sharedfp_sm_file_open.c

@@ -185,9 +185,9 @@ int mca_sharedfp_sm_file_open (struct ompi_communicator_t *comm,
 	    MPI_Offset position=0;
 
 #ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
-	    sem_wait(sm_offset_ptr->mutex);
+	    sem_wait(&sm_offset_ptr->mutex);
 	    sm_offset_ptr->offset=position;
-	    sem_post(sm_offset_ptr->mutex);
+	    sem_post(&sm_offset_ptr->mutex);
 #else
 	    sem_wait(sm_data->mutex);
 	    sm_offset_ptr->offset=position;
@@ -236,7 +236,7 @@ int mca_sharedfp_sm_file_close (mca_io_ompio_file_t *fh)
         if (file_data->sm_offset_ptr) {
             /* destroy semaphore */
 #ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
-	    sem_destroy(file_data->sm_offset_ptr->mutex);
+	    sem_destroy(&file_data->sm_offset_ptr->mutex);
 #else
  	    sem_unlink (file_data->sem_name);
  	    free (file_data->sem_name);

ompi/mca/sharedfp/sm/sharedfp_sm_request_position.c

@@ -49,7 +49,7 @@ int mca_sharedfp_sm_request_position(struct mca_sharedfp_base_data_t * sh,
     /* Aquire an exclusive lock */
 
 #ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
-    sem_wait(sm_offset_ptr->mutex);
+    sem_wait(&sm_offset_ptr->mutex);
 #else
     sem_wait(sm_data->mutex);
 #endif
@@ -75,7 +75,7 @@ int mca_sharedfp_sm_request_position(struct mca_sharedfp_base_data_t * sh,
     }
 
 #ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
-    sem_post(sm_offset_ptr->mutex);
+    sem_post(&sm_offset_ptr->mutex);
 #else
     sem_post(sm_data->mutex);
 #endif

ompi/mca/sharedfp/sm/sharedfp_sm_seek.c

@@ -122,7 +122,7 @@ mca_sharedfp_sm_seek (mca_io_ompio_file_t *fh,
         sm_offset_ptr = sm_data->sm_offset_ptr;
 
 #ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
-	sem_wait(sm_offset_ptr->mutex);
+	sem_wait(&sm_offset_ptr->mutex);
 #else
 	sem_wait(sm_data->mutex);
 #endif
@@ -135,7 +135,7 @@ mca_sharedfp_sm_seek (mca_io_ompio_file_t *fh,
 	    printf("sharedfp_sm_seek: Releasing sm lock...rank=%d",rank); fflush(stdout);
 	}
 #ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
-    sem_post(sm_offset_ptr->mutex);
+    sem_post(&sm_offset_ptr->mutex);
 #else
     sem_post(sm_data->mutex);
 #endif