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libuv/src/unix/aix.c  view on Meta::CPAN

        abort();
      }
      pc.cmd = PS_ADD;
      if (pollset_ctl(loop->backend_fd, &pc, 1)) {
        assert(0 && "Failed to add file descriptor (pc.fd) to pollset");
        abort();
      }
    }

    w->events = w->pevents;
  }

  assert(timeout >= -1);
  base = loop->time;
  count = 48; /* Benchmarks suggest this gives the best throughput. */

  for (;;) {
    nfds = pollset_poll(loop->backend_fd,
                        events,
                        ARRAY_SIZE(events),
                        timeout);

    /* Update loop->time unconditionally. It's tempting to skip the update when
     * timeout == 0 (i.e. non-blocking poll) but there is no guarantee that the
     * operating system didn't reschedule our process while in the syscall.
     */
    SAVE_ERRNO(uv__update_time(loop));

    if (nfds == 0) {
      assert(timeout != -1);
      return;
    }

    if (nfds == -1) {
      if (errno != EINTR) {
        abort();
      }

      if (timeout == -1)
        continue;

      if (timeout == 0)
        return;

      /* Interrupted by a signal. Update timeout and poll again. */
      goto update_timeout;
    }

    have_signals = 0;
    nevents = 0;

    assert(loop->watchers != NULL);
    loop->watchers[loop->nwatchers] = (void*) events;
    loop->watchers[loop->nwatchers + 1] = (void*) (uintptr_t) nfds;

    for (i = 0; i < nfds; i++) {
      pe = events + i;
      pc.cmd = PS_DELETE;
      pc.fd = pe->fd;

      /* Skip invalidated events, see uv__platform_invalidate_fd */
      if (pc.fd == -1)
        continue;

      assert(pc.fd >= 0);
      assert((unsigned) pc.fd < loop->nwatchers);

      w = loop->watchers[pc.fd];

      if (w == NULL) {
        /* File descriptor that we've stopped watching, disarm it.
         *
         * Ignore all errors because we may be racing with another thread
         * when the file descriptor is closed.
         */
        pollset_ctl(loop->backend_fd, &pc, 1);
        continue;
      }

      /* Run signal watchers last.  This also affects child process watchers
       * because those are implemented in terms of signal watchers.
       */
      if (w == &loop->signal_io_watcher)
        have_signals = 1;
      else
        w->cb(loop, w, pe->revents);

      nevents++;
    }

    if (have_signals != 0)
      loop->signal_io_watcher.cb(loop, &loop->signal_io_watcher, POLLIN);

    loop->watchers[loop->nwatchers] = NULL;
    loop->watchers[loop->nwatchers + 1] = NULL;

    if (have_signals != 0)
      return;  /* Event loop should cycle now so don't poll again. */

    if (nevents != 0) {
      if (nfds == ARRAY_SIZE(events) && --count != 0) {
        /* Poll for more events but don't block this time. */
        timeout = 0;
        continue;
      }
      return;
    }

    if (timeout == 0)
      return;

    if (timeout == -1)
      continue;

update_timeout:
    assert(timeout > 0);

    diff = loop->time - base;
    if (diff >= (uint64_t) timeout)
      return;

libuv/src/unix/aix.c  view on Meta::CPAN

  return 0;
}


int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
  uv_cpu_info_t* cpu_info;
  perfstat_cpu_total_t ps_total;
  perfstat_cpu_t* ps_cpus;
  perfstat_id_t cpu_id;
  int result, ncpus, idx = 0;

  result = perfstat_cpu_total(NULL, &ps_total, sizeof(ps_total), 1);
  if (result == -1) {
    return UV_ENOSYS;
  }

  ncpus = result = perfstat_cpu(NULL, NULL, sizeof(perfstat_cpu_t), 0);
  if (result == -1) {
    return UV_ENOSYS;
  }

  ps_cpus = (perfstat_cpu_t*) uv__malloc(ncpus * sizeof(perfstat_cpu_t));
  if (!ps_cpus) {
    return UV_ENOMEM;
  }

  /* TODO(bnoordhuis) Check uv__strscpy() return value. */
  uv__strscpy(cpu_id.name, FIRST_CPU, sizeof(cpu_id.name));
  result = perfstat_cpu(&cpu_id, ps_cpus, sizeof(perfstat_cpu_t), ncpus);
  if (result == -1) {
    uv__free(ps_cpus);
    return UV_ENOSYS;
  }

  *cpu_infos = (uv_cpu_info_t*) uv__malloc(ncpus * sizeof(uv_cpu_info_t));
  if (!*cpu_infos) {
    uv__free(ps_cpus);
    return UV_ENOMEM;
  }

  *count = ncpus;

  cpu_info = *cpu_infos;
  while (idx < ncpus) {
    cpu_info->speed = (int)(ps_total.processorHZ / 1000000);
    cpu_info->model = uv__strdup(ps_total.description);
    cpu_info->cpu_times.user = ps_cpus[idx].user;
    cpu_info->cpu_times.sys = ps_cpus[idx].sys;
    cpu_info->cpu_times.idle = ps_cpus[idx].idle;
    cpu_info->cpu_times.irq = ps_cpus[idx].wait;
    cpu_info->cpu_times.nice = 0;
    cpu_info++;
    idx++;
  }

  uv__free(ps_cpus);
  return 0;
}


void uv__platform_invalidate_fd(uv_loop_t* loop, int fd) {
  struct pollfd* events;
  uintptr_t i;
  uintptr_t nfds;
  struct poll_ctl pc;

  assert(loop->watchers != NULL);
  assert(fd >= 0);

  events = (struct pollfd*) loop->watchers[loop->nwatchers];
  nfds = (uintptr_t) loop->watchers[loop->nwatchers + 1];

  if (events != NULL)
    /* Invalidate events with same file descriptor */
    for (i = 0; i < nfds; i++)
      if ((int) events[i].fd == fd)
        events[i].fd = -1;

  /* Remove the file descriptor from the poll set */
  pc.events = 0;
  pc.cmd = PS_DELETE;
  pc.fd = fd;
  if(loop->backend_fd >= 0)
    pollset_ctl(loop->backend_fd, &pc, 1);
}