Moving the actual work into src/mpi/info/* files. This will allow

us to call Info related functions from lower layers without having
to make calls to the MPI layer calls.

This commit was SVN r730.

src/mpi/interface/c/info_delete.c

@@ -27,9 +27,8 @@
  * @retval MPI_ERR_NOKEY
  */
 int MPI_Info_delete(MPI_Info info, char *key) {
-    lam_info_entry_t *search;
-    lam_info_entry_t *found;
     int key_length;
+    int err;
     /**
      * This function merely deletes the (key,val) pair in info
      */
@@ -44,21 +43,11 @@ int MPI_Info_delete(MPI_Info info, char *key) {
         return MPI_ERR_INFO_KEY;
     }
 
-    search = lam_info_find_key (info, key);
+    err = lam_info_delete (info, key);
 
-    if (NULL == search){
-        printf ("Invalid key given\n");
-        return MPI_ERR_INFO_NOKEY;
-    } else {
-        /*
-         * An entry with this key value was found. Remove the item
-         * and free the memory allocated to it
-         */
-        found = (lam_info_entry_t *)
-                lam_list_remove_item (&(info->super),
-                                      (lam_list_item_t *)search);
-        OBJ_RELEASE(search);
+    if (MPI_ERR_INFO_NOKEY == err) {
+        printf ("Invalid Key given\n");
+        return err;
     }
-
-    return MPI_SUCCESS;
+    return err;
 }

src/mpi/interface/c/info_dup.c

@@ -21,6 +21,7 @@
  *
  *   @retval MPI_SUCCESS
  *   @retval MPI_ERR_ARG
+ *   @retval MPI_ERR_SYSRESOURCE
  *
  *   Not only will the (key, value) pairs be duplicated, the order of keys
  *   will be the same in 'newinfo' as it is in 'info'.
@@ -28,9 +29,7 @@
  *   'MPI_Info_free'.
  */
 int MPI_Info_dup(MPI_Info info, MPI_Info *newinfo) {
-    lam_info_entry_t *iterator;
     int err;
-    int nkeys;
     /**
      * Here we need to do 2 things
      * 1. Create a newinfo object using MPI_Info_create
@@ -54,18 +53,12 @@ int MPI_Info_dup(MPI_Info info, MPI_Info *newinfo) {
     /*
      * Now to actually duplicate all the values
      */
-    err = MPI_Info_get_nkeys (info, &nkeys);
+    err = lam_info_dup (info, newinfo);
 
-    for (iterator = (lam_info_entry_t *)lam_list_get_first(&(info->super));
-         nkeys > 0;
-         nkeys--) {
-        err = MPI_Info_set (*newinfo, iterator->ie_key, iterator->ie_value);
-        if (MPI_SUCCESS != err) {
-            printf ("Failed to set a key in newinfo\n");
+    if (err == MPI_ERR_SYSRESOURCE) {
+        printf ("Resources are not sufficient to finish dup'ing\n");
         return err;
     }  
-        iterator = (lam_info_entry_t *)iterator->super.lam_list_next;
-    }
         
     return MPI_SUCCESS;
 }

src/mpi/interface/c/info_free.c

@@ -24,8 +24,6 @@
  *   Upon successful completion, 'info' will be set to 'MPI_INFO_NULL'.
  */
 int MPI_Info_free(MPI_Info *info) {
-    lam_info_entry_t *iterator;
-    int nkeys;
     int err;
     /*
      * Free all the alloced items from MPI_Info info.
@@ -40,30 +38,11 @@ int MPI_Info_free(MPI_Info *info) {
     }
 
     /*
-     * Now to actually free all the values
+     * Now call the back end. Once again, it does not look like 
+     * there can be any error from this, but then who knows. Have
+     * to recheck this part too.
      */
-    err = MPI_Info_get_nkeys(*info, &nkeys);
-
-    /*
-     * We could just get each element from the list and then call
-     * MPI_Info_delete. But this causes unnecessary delay because 
-     * MPI_Info_delete has extra logic to it. So, do the simple 
-     * remove operation to save time.
-     */
-    for (iterator = (lam_info_entry_t *)lam_list_get_first(&((*info)->super));
-         nkeys > 0;
-         nkeys--) {
-        iterator = (lam_info_entry_t *)iterator->super.lam_list_next;
-        OBJ_RELEASE(iterator->super.lam_list_prev);
-    }
-
-    /*
-     * Anju:
-     * Add things to remove the fortran handle from the mapping table
-     */
-    
-    OBJ_RELEASE(*info);
-    *info = MPI_INFO_NULL;
+    err = lam_info_free (info);
     
     return MPI_SUCCESS;
 }

src/mpi/interface/c/info_get.c

@@ -36,9 +36,8 @@
 int MPI_Info_get(MPI_Info info, char *key, int valuelen,
                  char *value, int *flag) {
 
-    lam_info_entry_t *search;
+    int err;
     int key_length;
-    int value_length;
 
     /*
      * Simple function. All we need to do is search for the value
@@ -56,29 +55,12 @@ int MPI_Info_get(MPI_Info info, char *key, int valuelen,
         return MPI_ERR_INFO_KEY;
     }
 
-    search = lam_info_find_key (info, key);
+    err = lam_info_get (info, key, valuelen, value, flag);
     
-    if (NULL == search){
-        *flag = 0;
-    } else {
     /*
-         * We have found the element, so we can return the value
-         * Set the flag, value_length and value
+     * Once again, lam_info_get does not return any error. So, as of
+     * now there is no error condition to check for. But maybe this 
+     * needs to be re-evaluated and then something can be done 
      */
-        *flag = 1;
-        value_length = strlen(search->ie_value);
-        /*
-         * If the stored value is shorter than valuelen, then
-         * we can copy the entire value out. Else, we have to 
-         * copy ONLY valuelen bytes out
-         */
-        if (value_length < valuelen ) {
-               strcpy(value, search->ie_value);
-        } else {
-            lam_strncpy(value, search->ie_value, valuelen);
-            value[valuelen] = 0;
-        }
-    }
-
     return MPI_SUCCESS;
 }

src/mpi/interface/c/info_get_nkeys.c

@@ -27,12 +27,18 @@
  * containing the key-value pairs
  */
 int MPI_Info_get_nkeys(MPI_Info info, int *nkeys) {
+    int err;
 
     if (NULL == info){
         printf ("Invalid MPI_Info handle passed\n");
         return MPI_ERR_ARG;
     }
-    *nkeys = (int) lam_list_get_size(&(info->super));
+    err = lam_info_get_nkeys(info, nkeys);
+
+    /*
+     * check if there are any errors. There does not seem to be any 
+     * error possible in this. But have to look at it again
+     */
 
     return MPI_SUCCESS;
 }

src/mpi/interface/c/info_get_nthkey.c

@@ -25,8 +25,8 @@
  *   @retval MPI_ERR_ARG
  */
 int MPI_Info_get_nthkey(MPI_Info info, int n, char *key) {
-    lam_info_entry_t *iterator;
     int nkeys;
+    int err;
 
     /*
      * 1. Check if info is a valid handle
@@ -45,19 +45,14 @@ int MPI_Info_get_nthkey(MPI_Info info, int n, char *key) {
         return MPI_ERR_ARG;
     } else {
         /*
-         * Iterate over and over till we get to the nth key
+         * Everything seems alright. Call the back end key copy
          */
-        iterator = (lam_info_entry_t *)lam_list_get_first(&(info->super));
-        for ( ; n > 0; n--) {
-            iterator = (lam_info_entry_t *)
-                        iterator->super.lam_list_next;
+        err = lam_info_get_nthkey (info, n, key);
     }
+
     /*
-         * iterator is of the type lam_list_item_t. We have to 
-         * cast it to lam_info_entry_t before we can use it to
-         * access the value
+     * Have to check whether there are any error condditions. It appears
+     * that there are not too many error conditions from the look of it
      */
-        strcpy(key, iterator->ie_key);
-    }
     return MPI_SUCCESS;
 }

src/mpi/interface/c/info_get_valuelen.c

@@ -35,8 +35,8 @@
 int MPI_Info_get_valuelen(MPI_Info info, char *key, int *valuelen,
                           int *flag) {
 
-    lam_info_entry_t *search;
     int key_length;
+    int err;
 
     /*
      * Simple function. All we need to do is search for the value
@@ -53,17 +53,11 @@ int MPI_Info_get_valuelen(MPI_Info info, char *key, int *valuelen,
         return MPI_ERR_INFO_KEY;
     }
 
-    search = lam_info_find_key (info, key);
+    err = lam_info_get_valuelen (info, key, valuelen, flag);
 
-    if (NULL == search){
-        *flag = 0;
-    } else {
     /*
-         * We have found the element, so we can return the value
-         * Set the flag, value_length and value
+     * Once again, the error problem. lam_info_get_valuelen
+     * does not have an obvious error return.
      */
-        *flag = 1;
-        *valuelen = strlen(search->ie_value);
-    }
-    return MPI_SUCCESS;
+    return err;
 }

src/mpi/interface/c/info_set.c

@@ -37,12 +37,9 @@
  *   and MPI_ERR_INFO_VALUE are raised
  */
 int MPI_Info_set(MPI_Info info, char *key, char *value) {
-
-    lam_info_entry_t *new_info;
-    lam_info_entry_t *old_info; 
+    int err;
     int key_length;
     int value_length;
-    char *new_value; 
 
     /*
      * Error conditions are
@@ -74,38 +71,16 @@ int MPI_Info_set(MPI_Info info, char *key, char *value) {
     }
 
     /*
-     * If all is right with the arguments, then:
-     * 1. Allocate space for value 
-     * 2. Check if the key was associated with a previous value
-     *      - If so delete that value and store the new value
-     * 3. Store the (key, value) pair
+     * If all is right with the arguments, then call the back-end
+     * allocator.
      */
     
-    new_value = malloc(value_length * sizeof(char));
-    if (NULL == new_value) {
+    err = lam_info_set (info, key, value);
+
+    if (MPI_ERR_SYSRESOURCE == err) {
         printf ("Unable to malloc memory for new (key, value) pair\n");
-        return MPI_ERR_SYSRESOURCE;
+        return err;
     }
     
-    strcpy (new_value, value);
-    old_info = lam_info_find_key (info, key);
-
-    if (NULL != old_info) {
-        /*
-         * key already exists. remove the value associated with it
-         */
-        free(old_info->ie_value);
-        old_info->ie_value = new_value;
-    } else {
-        new_info = OBJ_NEW(lam_info_entry_t);
-        if (NULL == new_info) {
-            printf ("Unable to malloc memory for new (key, value) pair\n");
-            return MPI_ERR_SYSRESOURCE;
-        }
-        strcpy (new_info->ie_key, key);
-        new_info->ie_value = new_value;
-        lam_list_append (&(info->super), (lam_list_item_t *) new_info);
-    }
-    
-    return MPI_SUCCESS;
+    return err;
 }