Aryadev Chavali
6ec0108566
If you allocate a vector on the stack and default initialise
it (i.e. {0}), then by default "is_inlined" = 0. This is bad, as
technically speaking we should expect the vector to attempt to use
it's small inline buffer for vector operations before going onto the
heap - this will mess up our functions. So here I adjust the name to
make default stack based allocation a bit easier.
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/* Copyright (C) 2025 Aryadev Chavali
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the Unlicense for details.
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* You may distribute and modify this code under the terms of the Unlicense,
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* which you should have received a copy of along with this program. If not,
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* please go to <https://unlicense.org/>.
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* Created: 2025-08-20
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* Description: System management
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*/
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#include "../alisp.h"
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#include <assert.h>
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#include <malloc.h>
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#include <string.h>
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void sys_init(sys_t *sys)
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{
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memset(sys, 0, sizeof(*sys));
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vec_init(&sys->conses, 0);
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}
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void sys_register(sys_t *sys, lisp_t *ptr)
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{
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// Simply append it to the list of currently active conses
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vec_append(&sys->conses, &ptr, sizeof(&ptr));
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}
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void sys_cleanup(sys_t *sys)
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{
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static_assert(NUM_TAGS == 5);
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sym_table_cleanup(&sys->symtable);
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if (sys->conses.size == 0)
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return;
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// Iterate through each cons currently allocated and free them
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for (size_t i = 0; i < VEC_SIZE(&sys->conses, lisp_t **); ++i)
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{
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lisp_t *allocated = VEC_GET(&sys->conses, i, lisp_t *);
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switch (get_tag(allocated))
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{
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case TAG_CONS:
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// Delete the cons
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free(as_cons(allocated));
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break;
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case TAG_VEC:
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{
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vec_t *vec = as_vec(allocated);
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vec_free(vec);
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free(vec);
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break;
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}
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case TAG_NIL:
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case TAG_INT:
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case TAG_SYM:
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case NUM_TAGS:
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// shouldn't be dealt with (either constant or dealt with elsewhere)
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break;
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}
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}
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// Free the container
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vec_free(&sys->conses);
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// Ensure no one treats this as active in any sense
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memset(sys, 0, sizeof(*sys));
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}
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