/*
* erts_internal:port_connect/2 is used by the
* erlang:port_connect/2 BIF.
*/
BIF_RETTYPE erts_internal_port_connect_2(BIF_ALIST_2)
{
Eterm ref;
Port* prt;
prt = sig_lookup_port(BIF_P, BIF_ARG_1);
if (!prt)
BIF_RET(am_badarg);
#ifdef DEBUG
ref = NIL;
#endif
switch (erts_port_connect(BIF_P, 0, prt, BIF_P->common.id, BIF_ARG_2, &ref)) {
case ERTS_PORT_OP_CALLER_EXIT:
case ERTS_PORT_OP_BADARG:
case ERTS_PORT_OP_DROPPED:
BIF_RET(am_badarg);
case ERTS_PORT_OP_SCHEDULED:
ASSERT(is_internal_ordinary_ref(ref));
BIF_RET(ref);
break;
case ERTS_PORT_OP_DONE:
BIF_RET(am_true);
break;
default:
ERTS_INTERNAL_ERROR("Unexpected erts_port_connect() result");
BIF_RET(am_internal_error);
}
}
/*
* erts_internal:port_close/1 is used by the
* erlang:port_close/1 BIF.
*/
BIF_RETTYPE erts_internal_port_close_1(BIF_ALIST_1)
{
Eterm ref;
Port *prt;
#ifdef DEBUG
ref = NIL;
#endif
prt = sig_lookup_port(BIF_P, BIF_ARG_1);
if (!prt)
BIF_RET(am_badarg);
switch (erts_port_exit(BIF_P, 0, prt, BIF_P->common.id, am_normal, &ref)) {
case ERTS_PORT_OP_BADARG:
case ERTS_PORT_OP_DROPPED:
BIF_RET(am_badarg);
case ERTS_PORT_OP_SCHEDULED:
ASSERT(is_internal_ordinary_ref(ref));
BIF_RET(ref);
case ERTS_PORT_OP_DONE:
BIF_RET(am_true);
default:
ERTS_INTERNAL_ERROR("Unexpected erts_port_exit() result");
BIF_RET(am_internal_error);
}
}
void erts_add_monitor(ErtsMonitor **root, Uint type, Eterm ref, UWord entity,
Eterm name)
{
void *tstack[STACK_NEED];
int tpos = 0;
int dstack[STACK_NEED+1];
int dpos = 1;
int state = 0;
ErtsMonitor **this = root;
Sint c;
ASSERT(is_internal_ordinary_ref(ref) || is_external_ref(ref));
dstack[0] = DIR_END;
for (;;) {
if (!*this) { /* Found our place */
state = 1;
*this = create_monitor(type,ref,entity,name);
break;
} else if ((c = CMP_MON_REF(ref,(*this)->ref)) < 0) {
/* go left */
dstack[dpos++] = DIR_LEFT;
tstack[tpos++] = this;
this = &((*this)->left);
} else if (c > 0) { /* go right */
dstack[dpos++] = DIR_RIGHT;
tstack[tpos++] = this;
this = &((*this)->right);
} else { /* Equal key is an error for monitors */
erts_exit(ERTS_ERROR_EXIT,"Insertion of already present monitor!");
break;
}
}
insertion_rotation(dstack, dpos, tstack, tpos, state);
}
static Eterm copy_ref(Eterm ref, Eterm *hp)
{
ErtsORefThing *ptr;
ASSERT(is_internal_ordinary_ref(ref));
ptr = ordinary_ref_thing_ptr(ref);
memcpy(hp, ptr, sizeof(ErtsORefThing));
return (make_internal_ref(hp));
}
BIF_RETTYPE erts_internal_port_control_3(BIF_ALIST_3)
{
Port* prt;
Eterm retval;
Uint uint_op;
unsigned int op;
erts_aint32_t state;
prt = sig_lookup_port(BIF_P, BIF_ARG_1);
if (!prt)
BIF_RET(am_badarg);
if (!term_to_Uint(BIF_ARG_2, &uint_op))
BIF_RET(am_badarg);
if (uint_op > (Uint) UINT_MAX)
BIF_RET(am_badarg);
op = (unsigned int) uint_op;
switch (erts_port_control(BIF_P, prt, op, BIF_ARG_3, &retval)) {
case ERTS_PORT_OP_CALLER_EXIT:
case ERTS_PORT_OP_BADARG:
case ERTS_PORT_OP_DROPPED:
retval = am_badarg;
break;
case ERTS_PORT_OP_SCHEDULED:
ASSERT(is_internal_ordinary_ref(retval));
break;
case ERTS_PORT_OP_DONE:
ASSERT(is_not_internal_ref(retval));
break;
default:
ERTS_INTERNAL_ERROR("Unexpected erts_port_control() result");
retval = am_internal_error;
break;
}
state = erts_smp_atomic32_read_acqb(&BIF_P->state);
if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) {
#ifdef ERTS_SMP
if (state & ERTS_PSFLG_PENDING_EXIT)
erts_handle_pending_exit(BIF_P, ERTS_PROC_LOCK_MAIN);
#endif
ERTS_BIF_EXITED(BIF_P);
}
BIF_RET(retval);
}
BIF_RETTYPE erts_internal_port_call_3(BIF_ALIST_3)
{
Port* prt;
Eterm retval;
Uint uint_op;
unsigned int op;
erts_aint32_t state;
prt = sig_lookup_port(BIF_P, BIF_ARG_1);
if (!prt)
BIF_RET(am_badarg);
if (!term_to_Uint(BIF_ARG_2, &uint_op))
BIF_RET(am_badarg);
if (uint_op > (Uint) UINT_MAX)
BIF_RET(am_badarg);
op = (unsigned int) uint_op;
switch (erts_port_call(BIF_P, prt, op, BIF_ARG_3, &retval)) {
case ERTS_PORT_OP_DROPPED:
case ERTS_PORT_OP_BADARG:
retval = am_badarg;
break;
case ERTS_PORT_OP_SCHEDULED:
ASSERT(is_internal_ordinary_ref(retval));
break;
case ERTS_PORT_OP_DONE:
ASSERT(is_not_internal_ref(retval));
break;
default:
ERTS_INTERNAL_ERROR("Unexpected erts_port_call() result");
retval = am_internal_error;
break;
}
state = erts_atomic32_read_acqb(&BIF_P->state);
if (state & ERTS_PSFLG_EXITING)
ERTS_BIF_EXITED(BIF_P);
BIF_RET(retval);
}
BIF_RETTYPE erts_internal_port_info_2(BIF_ALIST_2)
{
Eterm retval;
Port* prt;
if (is_internal_port(BIF_ARG_1) || is_atom(BIF_ARG_1)) {
prt = sig_lookup_port(BIF_P, BIF_ARG_1);
if (!prt)
BIF_RET(am_undefined);
}
else if (is_external_port(BIF_ARG_1)) {
if (external_port_dist_entry(BIF_ARG_1) == erts_this_dist_entry)
BIF_RET(am_undefined);
else
BIF_RET(am_badarg);
}
else {
BIF_RET(am_badarg);
}
switch (erts_port_info(BIF_P, prt, BIF_ARG_2, &retval)) {
case ERTS_PORT_OP_CALLER_EXIT:
case ERTS_PORT_OP_BADARG:
BIF_RET(am_badarg);
case ERTS_PORT_OP_DROPPED:
BIF_RET(am_undefined);
case ERTS_PORT_OP_SCHEDULED:
ASSERT(is_internal_ordinary_ref(retval));
BIF_RET(retval);
case ERTS_PORT_OP_DONE:
ASSERT(is_not_internal_ref(retval));
BIF_RET(retval);
default:
ERTS_INTERNAL_ERROR("Unexpected erts_port_info() result");
BIF_RET(am_internal_error);
}
}
BIF_RETTYPE erts_internal_port_command_3(BIF_ALIST_3)
{
BIF_RETTYPE res;
Port *prt;
int flags = 0;
Eterm ref;
if (is_not_nil(BIF_ARG_3)) {
Eterm l = BIF_ARG_3;
while (is_list(l)) {
Eterm* cons = list_val(l);
Eterm car = CAR(cons);
if (car == am_force)
flags |= ERTS_PORT_SIG_FLG_FORCE;
else if (car == am_nosuspend)
flags |= ERTS_PORT_SIG_FLG_NOSUSPEND;
else
BIF_RET(am_badarg);
l = CDR(cons);
}
if (!is_nil(l))
BIF_RET(am_badarg);
}
prt = sig_lookup_port(BIF_P, BIF_ARG_1);
if (!prt)
BIF_RET(am_badarg);
if (flags & ERTS_PORT_SIG_FLG_FORCE) {
if (!(prt->drv_ptr->flags & ERL_DRV_FLAG_SOFT_BUSY))
BIF_RET(am_notsup);
}
#ifdef DEBUG
ref = NIL;
#endif
switch (erts_port_output(BIF_P, flags, prt, prt->common.id, BIF_ARG_2, &ref)) {
case ERTS_PORT_OP_CALLER_EXIT:
case ERTS_PORT_OP_BADARG:
case ERTS_PORT_OP_DROPPED:
ERTS_BIF_PREP_RET(res, am_badarg);
break;
case ERTS_PORT_OP_BUSY:
ASSERT(!(flags & ERTS_PORT_SIG_FLG_FORCE));
if (flags & ERTS_PORT_SIG_FLG_NOSUSPEND)
ERTS_BIF_PREP_RET(res, am_false);
else {
erts_suspend(BIF_P, ERTS_PROC_LOCK_MAIN, prt);
ERTS_BIF_PREP_YIELD3(res, bif_export[BIF_erts_internal_port_command_3],
BIF_P, BIF_ARG_1, BIF_ARG_2, BIF_ARG_3);
}
break;
case ERTS_PORT_OP_BUSY_SCHEDULED:
ASSERT(!(flags & ERTS_PORT_SIG_FLG_FORCE));
/* Fall through... */
case ERTS_PORT_OP_SCHEDULED:
ASSERT(is_internal_ordinary_ref(ref));
ERTS_BIF_PREP_RET(res, ref);
break;
case ERTS_PORT_OP_DONE:
ERTS_BIF_PREP_RET(res, am_true);
break;
default:
ERTS_INTERNAL_ERROR("Unexpected erts_port_output() result");
break;
}
if (ERTS_PROC_IS_EXITING(BIF_P)) {
KILL_CATCHES(BIF_P); /* Must exit */
ERTS_BIF_PREP_ERROR(res, BIF_P, EXC_ERROR);
}
return res;
}