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// this file includes functions, etc. used just about everywhere
// allocates aligned temporary memory
static u8 *tmp_alloc(State *state, size_t bytes) {
u32 used = state->tmp_mem_used;
u32 max_aligns_needed = (u32)(bytes + sizeof(MaxAlign) - 1) / (u32)sizeof(MaxAlign); // = ceil(bytes / sizeof(MaxAlign))
MaxAlign *ret = state->tmp_mem + used;
if (bytes == 0) {
return NULL;
}
if (used + max_aligns_needed > arr_count(state->tmp_mem)) {
printf("%zu\n",bytes);
assert(0);
return NULL;
}
state->tmp_mem_used += max_aligns_needed;
memset(ret, 0, bytes);
return (u8 *)ret;
}
/*
these functions save and restore the state of the temporary memory.
*/
static u32 tmp_push(State *state) {
return state->tmp_mem_used;
}
static void tmp_pop(State *state, u32 mark) {
state->tmp_mem_used = mark;
}
#define tmp_alloc_object(state, type) ((type *)tmp_alloc((state), sizeof(type)))
#define tmp_alloc_arr(state, type, n) ((type *)tmp_alloc((state), (n) * sizeof(type)))
#define calloc_object(type) ((type *)calloc(1, sizeof(type)))
#define calloc_arr(type, n) ((type *)calloc((n), sizeof(type)))
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