Adding some doc
Adding some dev documentation. No code change.
@@ -563,6 +563,7 @@ io_region *alloc_region(int ndims)
/**
* Allocate space for an IO description struct.
*
+ * @param ios pointer to the IO system info.
* @param piotype the PIO data type (ex. PIO_FLOAT, PIO_INT, etc.).
* @param ndims the number of dimensions.
* @returns pointer to the newly allocated io_desc_t or NULL if
