/**
* add an mtree into an existing tree
*
* @param[in] parent handle to the parent to be added to
* @param[in] h handle to the tree to add in
* @returns handle of newly added (sub) tree
*
* this function is destructive in that the task is accomplished by copying
* the values from the tree at h, and then freeing it.
*
*/
H _m_add(H parent,H h) {
L *pl,*l;
H r;
int x = _m_children(parent)+1;
int i,levels = h.m->levels;
H p = parent;
Mindex d = parent.a.i;
for (i=0;i<levels;i++) {
__m_new_init(p,&r,&pl);
l = _GET_LEVEL(h,i);
N *np = __m_add_nodes(r,pl,l->nodes);
N *n = &l->nP[0];
Mindex j = l->nodes;
while (j--) {
*np = *n;
if (np->parenti == NULL_ADDR) np->parenti = 0;
np->parenti += d;
np++; n++;
}
d = pl->nodes-l->nodes;
p.a.l++;
}
r.a = _m_child(parent,x);
__m_free(h,0); //free h but not it's surfaces which were copied into the parent
return r;
}
/**
* bootstrap the ceptr system
*
* starts up the vmhost and wakes up receptors that should be running in it.
*
* @TODO check the compository to verify our version of the vmhost
*
*/
void _a_boot(char *dir_path) {
// check if the storage directory exists
struct stat st = {0};
if (stat(dir_path, &st) == -1) {
// if no directory we are firing up an initial instance, so
// create directory
mkdir(dir_path,0700);
// instantiate a VMHost object
G_vm = _v_new();
// create the basic receptors that all VMHosts have
_v_instantiate_builtins(G_vm);
}
else {
char fn[1000];
void *buffer;
// unserialize the semtable base tree
SemTable *sem = _sem_new();
T *t = __a_unserializet(dir_path,SEM_FN);
sem->stores[0].definitions = t;
// restore definitions to the correct store slots
T *paths = __a_unserializet(dir_path,PATHS_FN);
int i = 0;
int c = _t_children(paths);
for(i=1;i<=c;i++) {
T *p = _t_child(paths,i);
if (semeq(RECEPTOR_PATH,_t_symbol(p))) {
T *x = _t_get(t,(int *)_t_surface(p));
sem->stores[i-1].definitions = x;
}
}
_t_free(paths);
sem->contexts = c+1;
// unserialize all of the vmhost's instantiated receptors and other instances
__a_vmfn(fn,dir_path);
buffer = readFile(fn,0);
Receptor *r = _r_unserialize(sem,buffer);
G_vm = __v_init(r,sem);
free(buffer);
// unserialize other vmhost state data
S *s;
__a_vm_state_fn(fn,dir_path);
s = readFile(fn,0);
H h = _m_unserialize(s);
free(s);
H hars; hars.m=h.m; hars.a = _m_child(h,1); // first child is ACTIVE_RECEPTORS
H har; har.m=h.m;
int j = _m_children(hars);
for (i=1;i<=j;i++) {
har.a = _m_child(hars,i);
if(!semeq(_m_symbol(har),RECEPTOR_XADDR)) raise_error("expecting RECEPTOR_XADDR!");
_v_activate(G_vm,*(Xaddr *)_m_surface(har));
}
_m_free(h);
}
G_vm->dir = dir_path;
// _a_check_vm_host_version_on_the_compository();
_v_start_vmhost(G_vm);
}
