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Begin work on new memory layout for all objects and GC.

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The layout should actually be very similar to the old layout, but
the code will be much easier to change and should be more portable.
This commit is contained in:
Calvin Rose
2019-02-21 11:22:29 -05:00
parent 811b1825cb
commit 00a47dc0cb
19 changed files with 196 additions and 145 deletions
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14
src/core/struct.c
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@@ -29,18 +29,18 @@
/* Begin creation of a struct */
JanetKV *janet_struct_begin(int32_t count) {
/* Calculate capacity as power of 2 after 2 * count. */
int32_t capacity = janet_tablen(2 * count);
if (capacity < 0) capacity = janet_tablen(count + 1);
size_t s = sizeof(int32_t) * 4 + (capacity * sizeof(JanetKV));
char *data = janet_gcalloc(JANET_MEMORY_STRUCT, s);
JanetKV *st = (JanetKV *)(data + 4 * sizeof(int32_t));
size_t size = sizeof(JanetStructHead) + capacity * sizeof(JanetKV);
JanetStructHead *head = janet_gcalloc(JANET_MEMORY_STRUCT, size);
head->length = count;
head->capacity = capacity;
head->hash = 0;
JanetKV *st = (JanetKV *)(head->data);
janet_memempty(st, capacity);
janet_struct_length(st) = count;
janet_struct_capacity(st) = capacity;
janet_struct_hash(st) = 0;
return st;
}