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#include "obj.h"
#include "arch/x86_64/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_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)) | 0xFFFF800000000000ULL);
}
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;
}
jove_obj_t
objdir_peeklocal(
jove_owned_obj_t *objdir_obj,
uint16_t entry)
{
if(obj_gettype(objdir_obj) != JOVE_OBJ_OBJDIR) {
errno = EBADOBJ;
return (jove_obj_t) { 0 };
}
if(entry >= JOVE_OBJDIR_ENTRIES) {
errno = EBADPATH;
return (jove_obj_t) { 0 };
}
jove_objdir_t *objtab = obj_deref(objdir_obj);
return objtab->entries[entry];
}
jove_owned_obj_t*
objdir_getlocal(
jove_owned_obj_t *objdir_obj,
uint16_t entry)
{
if(obj_gettype(objdir_obj) != JOVE_OBJ_OBJDIR) {
reterr(EBADOBJ);
}
if(entry >= JOVE_OBJDIR_ENTRIES) {
reterr(EBADPATH);
}
jove_objdir_t *objtab = obj_deref(objdir_obj);
return obj_take(&objtab->entries[entry]);
}
jove_owned_obj_t*
objdir_trygetlocal(
jove_owned_obj_t *objdir_obj,
uint16_t entry)
{
if(obj_gettype(objdir_obj) != JOVE_OBJ_OBJDIR) {
reterr(EBADOBJ);
}
if(entry >= JOVE_OBJDIR_ENTRIES) {
reterr(EBADPATH);
}
jove_objdir_t *objtab = obj_deref(objdir_obj);
return obj_trytake(&objtab->entries[entry]);
}
jove_owned_obj_t*
objdir_getobj(
jove_owned_obj_t *objdir_obj,
const uint16_t *path,
size_t path_len)
{
errno = 0;
if(path_len == 0) {
return objdir_obj;
}
{
jove_owned_obj_t *child_objdir = objdir_getlocal(objdir_obj, path[0]);
if(child_objdir == 0) {
reterr(EBADPATH);
}
jove_owned_obj_t *target_obj = objdir_getobj(child_objdir, path + 1, path_len - 1);
obj_release(child_objdir);
return target_obj;
}
}
jove_owned_obj_t*
objdir_trygetobj(
jove_owned_obj_t *objdir_obj,
const uint16_t *path,
size_t path_len)
{
errno = 0;
if(path_len == 0) {
return objdir_obj;
}
{
jove_owned_obj_t *child_objdir = objdir_trygetlocal(objdir_obj, path[0]);
if(child_objdir == 0) {
return 0;
}
jove_owned_obj_t *target_obj = objdir_trygetobj(child_objdir, path + 1, path_len - 1);
obj_release(child_objdir);
return target_obj;
}
}
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