Update hook component to use enum MCA parameter

 * `--mca ompi_comm_method`
   - `1` / `init` / `mpi_init` : Display during `MPI_Init`
   - `2` / `finalize` / `mpi_finalize` : Display during `MPI_Finalize`
   - `3` / `all` : Show both of the above

Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>

Author: jjhursey

ompi/mca/hook/comm_method/hook_comm_method_component.c

@@ -74,6 +74,16 @@ int mca_hook_comm_method_max = 12;
 int mca_hook_comm_method_brief = 0;
 char *mca_hook_comm_method_fakefile = NULL;
 
+mca_base_var_enum_value_t mca_hook_comm_method_modes[] = {
+    {1, "init"},
+    {1, "mpi_init"},
+    {2, "finalize"},
+    {2, "mpi_finalize"},
+    {3, "all"},
+    {0, NULL}
+};
+
+
 static int ompi_hook_comm_method_component_open(void)
 {
     // Nothing to do
@@ -88,6 +98,9 @@ static int ompi_hook_comm_method_component_close(void)
 
 static int ompi_hook_comm_method_component_register(void)
 {
+    int ret;
+    int mca_hook_comm_method_enabled = -1;
+    mca_base_var_enum_t *new_enum = NULL;
 
     /*
      * Component verbosity level
@@ -132,19 +145,26 @@ static int ompi_hook_comm_method_component_register(void)
                                            &mca_hook_comm_method_enable_mpi_finalize);
 
     // User can set the comm_method mca variable too
-    int hook_comm_method = -1;
-    (void) mca_base_var_register("ompi", NULL, NULL, "comm_method",
-                                 "Enable comm_method behavior (1) mpi_init or (2) mpi_finalize",
-                                 MCA_BASE_VAR_TYPE_INT, NULL,
-                                 0, 0,
-                                 OPAL_INFO_LVL_3,
-                                 MCA_BASE_VAR_SCOPE_READONLY,
-                                 &hook_comm_method);
-
-    if( 1 == hook_comm_method ) {
+    mca_base_var_enum_create("ompi_comm_method", mca_hook_comm_method_modes, &new_enum);
+    ret = mca_base_var_register("ompi", NULL, NULL, "comm_method",
+                                "Enable comm_method behavior at mpi_init (using the '1', 'init', or 'mpi_init' values), mpi_finalize (using the '2', 'finalize', or 'mpi_finalize' values), or both (using the '3', or 'all' value)",
+                                MCA_BASE_VAR_TYPE_INT, new_enum,
+                                0, 0,
+                                OPAL_INFO_LVL_3,
+                                MCA_BASE_VAR_SCOPE_READONLY,
+                                &mca_hook_comm_method_enabled);
+    OBJ_RELEASE(new_enum);
+    if(OPAL_ERR_VALUE_OUT_OF_BOUNDS == ret) {
+        opal_output(0, "hook:comm_method: Warning invalid prot mode specified: %d", mca_hook_comm_method_enabled);
+    }
+    else if( 1 == mca_hook_comm_method_enabled ) {
         mca_hook_comm_method_enable_mpi_init = true;
     }
-    else if( 2 == hook_comm_method ) {
+    else if( 2 == mca_hook_comm_method_enabled ) {
+        mca_hook_comm_method_enable_mpi_finalize = true;
+    }
+    else if( 3 == mca_hook_comm_method_enabled ) {
+        mca_hook_comm_method_enable_mpi_init = true;
         mca_hook_comm_method_enable_mpi_finalize = true;
     }