2 * Copyright © 2016 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
15 #include "ao_scheme.h"
18 ao_scheme_do_save(struct ao_scheme_cons *cons)
21 struct ao_scheme_os_save *os;
24 if (!ao_scheme_check_argc(_ao_scheme_atom_save, cons, 0, 0))
28 os = (struct ao_scheme_os_save *) (void *) &ao_scheme_pool[AO_SCHEME_POOL];
30 ao_scheme_collect(AO_SCHEME_COLLECT_FULL);
31 os->atoms = ao_scheme_atom_poly(ao_scheme_atoms);
32 os->globals = ao_scheme_frame_poly(ao_scheme_frame_global);
33 os->const_checksum = ao_scheme_const_checksum;
34 os->const_checksum_inv = (uint16_t) ~ao_scheme_const_checksum;
36 if (ao_scheme_os_save())
37 return _ao_scheme_bool_true;
39 return _ao_scheme_bool_false;
43 ao_scheme_do_restore(struct ao_scheme_cons *cons)
46 struct ao_scheme_os_save save;
47 struct ao_scheme_os_save *os = (struct ao_scheme_os_save *) (void *) &ao_scheme_pool[AO_SCHEME_POOL];
49 if (!ao_scheme_check_argc(_ao_scheme_atom_save, cons, 0, 0))
53 os = (struct ao_scheme_os_save *) (void *) &ao_scheme_pool[AO_SCHEME_POOL];
55 if (!ao_scheme_os_restore_save(&save, AO_SCHEME_POOL))
56 return ao_scheme_error(AO_SCHEME_INVALID, "header restore failed");
58 if (save.const_checksum != ao_scheme_const_checksum ||
59 save.const_checksum_inv != (uint16_t) ~ao_scheme_const_checksum)
61 return ao_scheme_error(AO_SCHEME_INVALID, "image is corrupted or stale");
64 if (ao_scheme_os_restore()) {
66 ao_scheme_atoms = ao_scheme_poly_atom(os->atoms);
67 ao_scheme_frame_global = ao_scheme_poly_frame(os->globals);
69 /* Clear the eval global variabls */
70 ao_scheme_eval_clear_globals();
72 /* Reset the allocator */
73 ao_scheme_top = AO_SCHEME_POOL;
74 ao_scheme_collect(AO_SCHEME_COLLECT_FULL);
76 /* Re-create the evaluator stack */
77 if (!ao_scheme_eval_restart())
78 return _ao_scheme_bool_false;
80 return _ao_scheme_bool_true;
83 return _ao_scheme_bool_false;