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/*
* arena.c
* arena allocator i wrote during a meeting in 30 mins
* imogen sorindeia thoms 2025
* */
#include <stdlib.h>
#include <stdint.h>
#include "arena.h"
/* initialize an arena with given capacity */
mogi_arena_t mogi_arena_init(size_t size) {
mogi_arena_t a = {
.buffer = calloc(size, 1),
.capacity = size
};
return a;
}
/* get rid of entire arena */
void mogi_arena_dispose(mogi_arena_t *a) {
if(NULL != a->buffer) {
free(a->buffer);
}
}
/* allocate space on arena
* TODO: alignment l m f a o
*/
uintptr_t mogi_arena_allocate(mogi_arena_t *a, size_t size) {
if((NULL == a->buffer) || ((a->posn + size) > a->capacity)) {
return (uintptr_t)0;
}
uintptr_t p = (uintptr_t)(a->buffer + a->posn);
a->posn += (uintptr_t)size;
return p;
}
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