arch/x86_64/hal/obj.c


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#include "obj.h"
#include "sys/lock.h"
#include "lib/printf.h"
#include "paging.h"
#include "hal/obj.h"
#include "jove.h"
#include "sys/link.h"

jove_owned_obj_t*
obj_take(jove_obj_t *obj)
{
    if((uintptr_t)obj < IDENT_VIRT_BASE) {
        reterr(EBADOBJ);
    }
    take_mutex(&obj->lock);
    return (jove_owned_obj_t*)obj;
}

jove_owned_obj_t*
obj_trytake(jove_obj_t *obj)
{
    if((uintptr_t)obj < IDENT_VIRT_BASE) {
        reterr(EBADOBJ);
    }
    if(try_take_mutex(&obj->lock)) {
        reterr(EBUSY);
    }
    return (jove_owned_obj_t*)obj;
}

jove_obj_t *obj_asunowned(jove_owned_obj_t *obj)
{
    return (jove_obj_t*)obj;
}

jove_obj_t*
obj_release(jove_owned_obj_t *obj)
{
    if((uintptr_t)obj < IDENT_VIRT_BASE) {
        reterr(EBADOBJ);
    }
    release_mutex((atomic_flag*)&obj->locked.lock);
    return (jove_obj_t*)obj;
}

void*
obj_deref(jove_owned_obj_t *obj)
{
    return (void*)(((uintptr_t)obj_getvalue(obj)) | IDENT_VIRT_BASE);
}

uint8_t
obj_gettype(jove_owned_obj_t *obj)
{
    return obj->locked.type;
}

uint8_t
obj_peektype(jove_obj_t obj)
{
    return obj.type;
}

void
obj_settype(jove_owned_obj_t *obj, uint8_t type)
{
    obj->locked.type = type;
}

uintmax_t
obj_getvalue(jove_owned_obj_t *obj)
{
    return obj->locked.value;
}

void
obj_setvalue(jove_owned_obj_t *obj, uintmax_t value)
{
    obj->locked.value = value & 0x00007FFFFFFFFFFFULL;
}

bool 
obj_compare(jove_obj_t *a, jove_obj_t *b)
{
    return a->data == b->data;
}