C++ (Cpp) erts_msg_distext2heap Beispiele

Beispiel #1

Datei: erl_message.c Projekt: users-tree/alex

void
erts_queue_dist_message(Process *rcvr,
			ErtsProcLocks *rcvr_locks,
			ErtsDistExternal *dist_ext,
			Eterm token)
{
    ErlMessage* mp;
#ifdef USE_VM_PROBES
    Sint tok_label = 0;
    Sint tok_lastcnt = 0;
    Sint tok_serial = 0;
#endif
#ifdef ERTS_SMP
    erts_aint_t state;
#endif

    ERTS_SMP_LC_ASSERT(*rcvr_locks == erts_proc_lc_my_proc_locks(rcvr));

    mp = message_alloc();

#ifdef ERTS_SMP
    if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ)) {
	if (erts_smp_proc_trylock(rcvr, ERTS_PROC_LOCK_MSGQ) == EBUSY) {
	    ErtsProcLocks need_locks = ERTS_PROC_LOCK_MSGQ;
	    if (*rcvr_locks & ERTS_PROC_LOCK_STATUS) {
		erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_STATUS);
		need_locks |= ERTS_PROC_LOCK_STATUS;
	    }
	    erts_smp_proc_lock(rcvr, need_locks);
	}
    }

    state = erts_smp_atomic32_read_acqb(&rcvr->state);
    if (state & (ERTS_PSFLG_PENDING_EXIT|ERTS_PSFLG_EXITING)) {
	if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ))
	    erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
	/* Drop message if receiver is exiting or has a pending exit ... */
	if (is_not_nil(token)) {
	    ErlHeapFragment *heap_frag;
	    heap_frag = erts_dist_ext_trailer(mp->data.dist_ext);
	    erts_cleanup_offheap(&heap_frag->off_heap);
	}
	erts_free_dist_ext_copy(dist_ext);
	message_free(mp);
    }
    else
#endif
    if (IS_TRACED_FL(rcvr, F_TRACE_RECEIVE)) {
	/* Ahh... need to decode it in order to trace it... */
	ErlHeapFragment *mbuf;
	Eterm msg;
	if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ))
	    erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);
	message_free(mp);
	msg = erts_msg_distext2heap(rcvr, rcvr_locks, &mbuf, &token, dist_ext);
	if (is_value(msg))
#ifdef USE_VM_PROBES
            if (DTRACE_ENABLED(message_queued)) {
                DTRACE_CHARBUF(receiver_name, DTRACE_TERM_BUF_SIZE);

                dtrace_proc_str(rcvr, receiver_name);
                if (token != NIL && token != am_have_dt_utag) {
                    tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
                    tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
                    tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
                }
                DTRACE6(message_queued,
                        receiver_name, size_object(msg), rcvr->msg.len,
                        tok_label, tok_lastcnt, tok_serial);
            }
#endif
	    erts_queue_message(rcvr, rcvr_locks, mbuf, msg, token);
    }
    else {
	/* Enqueue message on external format */

	ERL_MESSAGE_TERM(mp) = THE_NON_VALUE;
#ifdef USE_VM_PROBES
	ERL_MESSAGE_DT_UTAG(mp) = NIL;
	if (token == am_have_dt_utag) {
	    ERL_MESSAGE_TOKEN(mp) = NIL;
	} else {
#endif
	    ERL_MESSAGE_TOKEN(mp) = token;
#ifdef USE_VM_PROBES
	}
#endif
	mp->next = NULL;

#ifdef USE_VM_PROBES
        if (DTRACE_ENABLED(message_queued)) {
            DTRACE_CHARBUF(receiver_name, DTRACE_TERM_BUF_SIZE);

            dtrace_proc_str(rcvr, receiver_name);
            if (token != NIL && token != am_have_dt_utag) {
                tok_label = signed_val(SEQ_TRACE_T_LABEL(token));
                tok_lastcnt = signed_val(SEQ_TRACE_T_LASTCNT(token));
                tok_serial = signed_val(SEQ_TRACE_T_SERIAL(token));
            }
            /*
             * TODO: We don't know the real size of the external message here.
             *       -1 will appear to a D script as 4294967295.
             */
            DTRACE6(message_queued, receiver_name, -1, rcvr->msg.len + 1,
                    tok_label, tok_lastcnt, tok_serial);
        }
#endif
	mp->data.dist_ext = dist_ext;
	LINK_MESSAGE(rcvr, mp);

	if (!(*rcvr_locks & ERTS_PROC_LOCK_MSGQ))
	    erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_MSGQ);

	erts_proc_notify_new_message(rcvr,
#ifdef ERTS_SMP
				     *rcvr_locks
#else
				     0
#endif
	    );
    }
}

Beispiel #2

Datei: erl_message.c Projekt: Tony1928/erlang

void
erts_queue_dist_message(Process *rcvr,
			ErtsProcLocks *rcvr_locks,
			ErtsDistExternal *dist_ext,
			Eterm token)
{
    ErlMessage* mp;
#ifdef ERTS_SMP
    ErtsProcLocks need_locks;
#endif

    ERTS_SMP_LC_ASSERT(*rcvr_locks == erts_proc_lc_my_proc_locks(rcvr));

    mp = message_alloc();

#ifdef ERTS_SMP
    need_locks = ~(*rcvr_locks) & (ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS);
    if (need_locks) {
	*rcvr_locks |= need_locks;
	if (erts_smp_proc_trylock(rcvr, need_locks) == EBUSY) {
	    if (need_locks == ERTS_PROC_LOCK_MSGQ) {
		erts_smp_proc_unlock(rcvr, ERTS_PROC_LOCK_STATUS);
		need_locks = (ERTS_PROC_LOCK_MSGQ
			      | ERTS_PROC_LOCK_STATUS);
	    }
	    erts_smp_proc_lock(rcvr, need_locks);
	}
    }

    if (rcvr->is_exiting || ERTS_PROC_PENDING_EXIT(rcvr)) {
	/* Drop message if receiver is exiting or has a pending exit ... */
	if (is_not_nil(token)) {
	    ErlHeapFragment *heap_frag;
	    heap_frag = erts_dist_ext_trailer(mp->data.dist_ext);
	    erts_cleanup_offheap(&heap_frag->off_heap);
	}
	erts_free_dist_ext_copy(dist_ext);
	message_free(mp);
    }
    else
#endif
    if (IS_TRACED_FL(rcvr, F_TRACE_RECEIVE)) {
	/* Ahh... need to decode it in order to trace it... */
	ErlHeapFragment *mbuf;
	Eterm msg;
	message_free(mp);
	msg = erts_msg_distext2heap(rcvr, rcvr_locks, &mbuf, &token, dist_ext);
	if (is_value(msg))
	    erts_queue_message(rcvr, rcvr_locks, mbuf, msg, token);
    }
    else {
	/* Enqueue message on external format */

	ERL_MESSAGE_TERM(mp) = THE_NON_VALUE;
	ERL_MESSAGE_TOKEN(mp) = token;
	mp->next = NULL;

	mp->data.dist_ext = dist_ext;
	LINK_MESSAGE(rcvr, mp);

	notify_new_message(rcvr);
    }
}