Set or get an integer-valued AST global tuning parameter astTune
This function attempts to execute even if the AST error status is set on entry, although no further error report will be made if it subsequently fails under these circumstances.
All threads in a process share the same AST tuning parameters values.
"
free"
function. If it is non-zero,
the memory is not freed. Instead a pointer to it is stored in a pool of such
pointers, all of which refer to allocated but currently unused blocks of memory.
This allows AST to speed up subsequent Object creation by re-using previously
allocated memory blocks rather than allocating new memory using the systems
malloc function. The default value for this parameter is zero. Setting it to a
non-zero value will result in Object memory being cached in future. Setting it
back to zero causes any memory blocks currently in the pool to be freed. Note,
this tuning parameter only controls the caching of memory used to store AST
Objects. To cache other memory blocks allocated by AST, use MemoryCaching.