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    1/*  Part of SWI-Prolog
    2
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    4    Copyright (c)  2020-2021, SWI-Prolog Solutions b.v.
    5    All rights reserved.
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    7    Redistribution and use in source and binary forms, with or without
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   12       notice, this list of conditions and the following disclaimer.
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   17       distribution.
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   19    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   20    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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   22    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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   31*/
   32
   33:- module(sicstus4,
   34	  [ nonmember/2,		% ?Element, ?List
   35	    statistics/2,		% ?Key, ?Value
   36	    op(1100, xfy, (do))
   37	  ]).   38:- reexport(sicstus,
   39	    [ (block)/1,
   40	      if/3,
   41	      use_module/3,
   42	      bb_put/2,
   43	      bb_get/2,
   44	      bb_delete/2,
   45	      bb_update/3,
   46	      is_mutable/1 as mutable,
   47	      create_mutable/2,
   48	      get_mutable/2,
   49	      update_mutable/2,
   50	      sicstus_is_readable_stream/1,
   51	      read_line/1,
   52	      read_line/2,
   53	      trimcore/0,
   54	      prolog_flag/3,
   55	      op(1150, fx, (block)),
   56	      op(1150, fx, (mode)),
   57	      op(900, fy, (spy)),
   58	      op(900, fy, (nospy))
   59	    ]).

SICStus 4 compatibility library

This library is intended to be activated using the directive below in files that are designed for use with SICStus Prolog 4. The changes are in effect until the end of the file and in each file loaded from this file.

:- expects_dialect(sicstus4).

This library only provides compatibility with version 4 of SICStus Prolog. For SICStus Prolog 3 compatibility, use library(dialect/sicstus) instead.

To be done
- The dialect-compatibility packages are developed in a `demand-driven' fashion. Please contribute to this package. */
   78% Note: Although the do operator is declared here, do loops currently
   79% aren't emulated by library(dialect/sicstus4).
   80:- op(1100, xfy, user:(do)).   81
   82
   83		 /*******************************
   84		 *	    LIBRARY SETUP	*
   85		 *******************************/
 push_sicstus4_library
Pushes searching for dialect/sicstus4 in front of every library directory that contains such as sub-directory.
   92push_sicstus4_library :-
   93	(   absolute_file_name(library(dialect/sicstus4), Dir,
   94			       [ file_type(directory),
   95				 access(read),
   96				 solutions(all),
   97				 file_errors(fail)
   98			       ]),
   99	    asserta((user:file_search_path(library, Dir) :-
  100		    prolog_load_context(dialect, sicstus4))),
  101	    fail
  102	;   true
  103	).
  104
  105
  106:- push_sicstus4_library.
 setup_dialect
Further dialect initialization.

sicstus4 currently performs the same initialization as the sicstus (SICStus 3) dialect.

  116setup_dialect :- sicstus:setup_dialect.
  117
  118
  119		 /*******************************
  120		 *	  LIBRARY MODULES	*
  121		 *******************************/
 rename_module(?SICStus4Module, ?RenamedSICStus4Module) is nondet
True if RenamedSICStus4Module is the name that we use for the SICStus 4 native module SICStus4Module. We do this in places where the module-name conflicts. All explicitly qualified goals are mapped to the SICStus 4 equivalent of the module.
  130:- multifile
  131	rename_module/2.  132
  133system:goal_expansion(M:Goal, SicstusM:Goal) :-
  134	atom(M),
  135	rename_module(M, SicstusM),
  136	prolog_load_context(dialect, sicstus4).
  137
  138
  139% SICStus 4 copy_term/2 behaves like SWI copy_term_nat/2.
  140user:goal_expansion(copy_term(Term, Copy), copy_term_nat(Term, Copy)) :-
  141	prolog_load_context(dialect, sicstus4).
 nonmember(?Element, ?List) is semidet
True if Element doesn't unify with any element in List. No variables are bound.
  149nonmember(Element, List) :- \+ memberchk(Element, List).
  150
  151% As of SICStus 4.6.0, the following statistics/2 keys are still missing:
  152% Introduced in SICStus 4.0:
  153% * defragmentation
  154% Introduced in SICStus 4.1:
  155% * choice_used, choice_free
  156% * defrag_count, defrag_time
  157% * dpgc_count, dpgc_time
  158% * memory_culprit
  159% * memory_buckets
  160% Introduced in SICStus 4.3:
  161% * jit_count, jit_time
  162
  163statistics(total_runtime, Stats) :- !, system:statistics(runtime, Stats).
  164% The following keys were introduced with SICStus Prolog 4.1.
  165statistics(memory_used, BytesUsed) :- !, system:statistics(memory, [BytesUsed, _]).
  166statistics(memory_free, BytesFree) :- !, system:statistics(memory, [_, BytesFree]).
  167statistics(global_stack_used, BytesUsed) :- !, system:statistics(global_stack, [BytesUsed, _]).
  168statistics(global_stack_free, BytesFree) :- !, system:statistics(global_stack, [_, BytesFree]).
  169statistics(local_stack_used, BytesUsed) :- !, system:statistics(local_stack, [BytesUsed, _]).
  170statistics(local_stack_free, BytesFree) :- !, system:statistics(local_stack, [_, BytesFree]).
  171statistics(trail_used, BytesUsed) :- !, system:statistics(trail, [BytesUsed, _]).
  172statistics(trail_free, BytesFree) :- !, system:statistics(trail, [_, BytesFree]).
  173statistics(atoms_used, BytesUsed) :- !, system:statistics(atom_space, BytesUsed).
  174statistics(atoms_nbused, CountUsed) :- !, system:statistics(atoms, CountUsed).
  175statistics(atoms_nbfree, CountFree) :- !, CountFree = 0.
  176statistics(ss_global, Count) :- !, system:statistics(stack_shifts, [Count, _, _]).
  177statistics(ss_local, Count) :- !, system:statistics(stack_shifts, [_, Count, _]).
  178statistics(ss_time, Time) :- !, system:statistics(stack_shifts, [_, _, Time]).
  179statistics(gc_count, Count) :- !, system:statistics(garbage_collection, [Count, _, _|_]).
  180statistics(gc_freed, BytesFreed) :- !, system:statistics(garbage_collection, [_, BytesFreed, _|_]).
  181statistics(gc_time, Time) :- !, system:statistics(garbage_collection, [_, _, Time|_]).
  182statistics(agc_count, Count) :- !, system:statistics(atom_garbage_collection, [Count, _, _]).
  183statistics(agc_freed, BytesFreed) :- !, system:statistics(atom_garbage_collection, [_, BytesFreed, _]).
  184statistics(agc_time, Time) :- !, system:statistics(atom_garbage_collection, [_, _, Time]).
  185statistics(dcgc_count, Count) :- !, system:statistics(clause_garbage_collection, [Count, _, _]).
  186statistics(dcgc_time, Time) :- !, system:statistics(clause_garbage_collection, [_, _, Time]).
  187
  188:- use_module(sicstus, [statistics/2 as sicstus3_statistics]).  189statistics(Keyword, Value) :- sicstus3_statistics(Keyword, Value).
  190
  191% Provide (\)/2 as arithmetic function.  Ideally, we should be able to
  192% bind multiple names to built-in functions.  This is rather slow.  We
  193% could also consider adding \ internally, but not turning it into an
  194% operator.
  195
  196:- arithmetic_function(user:(\)/2).  197
  198user:(\(X,Y,R)) :-
  199	R is xor(X,Y)