> PL_initialise().

PL_ACTION_WRITE

Write the argument, a char * to the current output stream.

PL_ACTION_FLUSH

Flush the current output stream. Requires no arguments.

PL_ACTION_ATTACH_CONSOLE

Attach a console to a thread if it does not have one. See attach_console/0.

PL_GMP_SET_ALLOC_FUNCTIONS

Takes an integer argument. If TRUE, the GMP allocations are immediately bound to the Prolog functions. If FALSE, SWI-Prolog will never rebind the GMP allocation functions. See mp_set_memory_functions() in the GMP documentation. The action returns FALSE if there is no GMP support or GMP is already initialised.

12.4.18 Querying Prolog

long PL_query(int)

Obtain status information on the Prolog system. The actual argument type depends on the information required. int describes what information is wanted.^{193Returning pointers and integers as a long is bad style. The signature of this function should be changed.} The options are given in table 9.

PL_QUERY_ARGC	Return an integer holding the number of arguments given to Prolog from Unix.
PL_QUERY_ARGV	Return a char ** holding the argument vector given to Prolog from Unix.
PL_QUERY_SYMBOLFILE	Return a char * holding the current symbo