proc/init.c


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#include "init.h"
#include "sys/objdir.h"
#include "hal/memory.h"
#include "panic/panic.h"

objpath_part_t s_last_region = OBJDIR_ENTRIES-1;

jove_owned_obj_t
init_pop_alloc(void)
{
    jove_owned_obj_t *freemem_dir = objdir_trygetlocal(_rootdir_obj, INIT_ROOTDIR_FREEMEMORY_I);
    if(freemem_dir == 0) {
        kpanic("Untyped directory is locked!\n");
    }
    int cycles = 0;

    while(cycles++ < 512) {
        if(objdir_peeklocal(freemem_dir, s_last_region).type != JOVE_OBJ_REGION) {
            s_last_region--;
            continue;
        }

        jove_owned_obj_t frame = { 0 };
        jove_owned_obj_t *region = objdir_getlocal(freemem_dir, s_last_region);

        if(region_alloc(region, &frame) < 0) {
            obj_release(region);
            continue;
        }

        obj_release(region);
        obj_release(freemem_dir);
        return frame;
    }
    kpanic("%s: Kernel is out of memory!\n", __func__);
}