C++ dt_pthread_mutex_lock函数代码示例

void dt_lua_lock()
{
  if(!darktable.lua_state.ending && pthread_equal(darktable.control->gui_thread, pthread_self()) != 0)
  {
    dt_print(DT_DEBUG_LUA, "LUA WARNING locking from the gui thread should be avoided\n");
    //g_assert(false);
  }

  dt_pthread_mutex_lock(&darktable.lua_state.mutex);
}

static gboolean _dt_ctl_log_message_timeout_callback(gpointer data)
{
  dt_pthread_mutex_lock(&darktable.control->log_mutex);
  if(darktable.control->log_ack != darktable.control->log_pos)
    darktable.control->log_ack = (darktable.control->log_ack + 1) % DT_CTL_LOG_SIZE;
  darktable.control->log_message_timeout_id = 0;
  dt_pthread_mutex_unlock(&darktable.control->log_mutex);
  dt_control_queue_redraw_center();
  return FALSE;
}

void dt_control_progress_set_progress(dt_control_t *control, dt_progress_t *progress, double value)
{
  // set the value
  dt_pthread_mutex_lock(&progress->mutex);
  progress->progress = value;
  dt_pthread_mutex_unlock(&progress->mutex);

  // tell the gui
  dt_pthread_mutex_lock(&control->progress_system.mutex);
  if(control->progress_system.proxy.module != NULL)
    control->progress_system.proxy.updated(control->progress_system.proxy.module, progress->gui_data, value);
  dt_pthread_mutex_unlock(&control->progress_system.mutex);

#ifdef HAVE_UNITY
  if(progress->has_progress_bar)
    unity_launcher_entry_set_progress(progress->darktable_launcher, CLAMP(value, 0, 1.0));
#endif

}

void dt_lua_init_lock()
{
  pthread_mutexattr_t a;
  pthread_mutexattr_init(&a);
  pthread_mutexattr_settype(&a, PTHREAD_MUTEX_RECURSIVE);
  dt_pthread_mutex_init(&darktable.lua_state.mutex, &a);
  pthread_mutexattr_destroy(&a);
  // we want our lock initialized locked
  dt_pthread_mutex_lock(&darktable.lua_state.mutex);
}

void dt_dev_module_remove(dt_develop_t *dev, dt_iop_module_t *module)
{
  //if(darktable.gui->reset) return;
  dt_pthread_mutex_lock(&dev->history_mutex);
  int del = 0;
  if(dev->gui_attached)
  {
    int nb = g_list_length(dev->history);
    int pos = 0;
    for (int i=0; i<nb; i++)
    {
      GList *elem = g_list_nth(dev->history,pos);

      dt_dev_history_item_t *hist = (dt_dev_history_item_t *)(elem->data);

      if (module->instance == hist->module->instance && module->multi_priority == hist->module->multi_priority)
      {
        free(hist->params);
        free(hist->blend_params);
        free(hist);
        dev->history = g_list_delete_link(dev->history, elem);
        dev->history_end--;
        del = 1;
      }
      else
      {
        pos++;
      }
    }
  }

  dt_pthread_mutex_unlock(&dev->history_mutex);

  //and we remove it from the list
  GList *modules = g_list_first(dev->iop);
  while(modules)
  {
    dt_iop_module_t *mod = (dt_iop_module_t *)modules->data;
    if(mod == module)
    {
      dev->iop = g_list_remove_link(dev->iop,modules);
      break;
    }
    modules = g_list_next(modules);
  }

  if(dev->gui_attached && del)
  {
    /* signal that history has changed */
    dt_control_signal_raise(darktable.signals, DT_SIGNAL_DEVELOP_HISTORY_CHANGE);
    /* redraw */
    dt_control_queue_redraw_center();
  }

}

void gui_update(struct dt_iop_module_t *self)
{
  dt_iop_exposure_gui_data_t *g = (dt_iop_exposure_gui_data_t *)self->gui_data;
  dt_iop_exposure_params_t *p = (dt_iop_exposure_params_t *)self->params;

  if(!dt_image_is_raw(&self->dev->image_storage))
  {
    gtk_widget_hide(GTK_WIDGET(g->mode));
    p->mode = EXPOSURE_MODE_MANUAL;
    dt_dev_add_history_item(darktable.develop, self, TRUE);
  }
  else
  {
    gtk_widget_show(GTK_WIDGET(g->mode));
  }

  dt_bauhaus_combobox_set(g->mode, g_list_index(g->modes, GUINT_TO_POINTER(p->mode)));

  dt_bauhaus_slider_set_soft(g->black, p->black);
  dt_bauhaus_slider_set_soft(g->exposure, p->exposure);

  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(g->autoexp), FALSE);
  dt_bauhaus_slider_set(g->autoexpp, 0.01);
  gtk_widget_set_sensitive(GTK_WIDGET(g->autoexpp), FALSE);

  dt_bauhaus_slider_set(g->deflicker_percentile, p->deflicker_percentile);
  dt_bauhaus_slider_set(g->deflicker_target_level, p->deflicker_target_level);
  dt_bauhaus_combobox_set(
      g->deflicker_histogram_source,
      g_list_index(g->deflicker_histogram_sources, GUINT_TO_POINTER(p->deflicker_histogram_source)));

  self->request_color_pick = DT_REQUEST_COLORPICK_OFF;

  free(g->deflicker_histogram);
  g->deflicker_histogram = NULL;

  gtk_label_set_text(g->deflicker_used_EC, "");
  dt_pthread_mutex_lock(&g->lock);
  g->deflicker_computed_exposure = NAN;
  dt_pthread_mutex_unlock(&g->lock);

  switch(p->mode)
  {
    case EXPOSURE_MODE_DEFLICKER:
      autoexp_disable(self);
      gtk_stack_set_visible_child_name(GTK_STACK(g->mode_stack), "deflicker");
      if(p->deflicker_histogram_source == DEFLICKER_HISTOGRAM_SOURCE_SOURCEFILE)
        deflicker_prepare_histogram(self, &g->deflicker_histogram, &g->deflicker_histogram_stats);
      break;
    case EXPOSURE_MODE_MANUAL:
    default:
      gtk_stack_set_visible_child_name(GTK_STACK(g->mode_stack), "manual");
      break;
  }
}

void _camera_configuration_update(const dt_camctl_t *c,const dt_camera_t *camera)
{
// dt_camctl_t *camctl=(dt_camctl_t *)c;
  dt_camera_t *cam=(dt_camera_t *)camera;
  dt_pthread_mutex_lock(&cam->config_lock);
  CameraWidget *remote; // Copy of remote configuration
  gp_camera_get_config( camera->gpcam, &remote, c->gpcontext );
  // merge remote copy with cache and notify on changed properties to host application
  _camera_configuration_merge(c, camera, remote, camera->configuration, FALSE );
  dt_pthread_mutex_unlock(&cam->config_lock);
}

static int32_t dt_control_run_job(dt_control_t *control)
{
  _dt_job_t *job = dt_control_schedule_job(control);

  if(!job) return -1;

  /* change state to running */
  dt_pthread_mutex_lock(&job->wait_mutex);
  if(dt_control_job_get_state(job) == DT_JOB_STATE_QUEUED)
  {
    dt_print(DT_DEBUG_CONTROL, "[run_job+] %02d %f ", DT_CTL_WORKER_RESERVED + dt_control_get_threadid(),
             dt_get_wtime());
    dt_control_job_print(job);
    dt_print(DT_DEBUG_CONTROL, "\n");

    dt_control_job_set_state(job, DT_JOB_STATE_RUNNING);

    /* execute job */
    job->result = job->execute(job);

    dt_control_job_set_state(job, DT_JOB_STATE_FINISHED);

    dt_print(DT_DEBUG_CONTROL, "[run_job-] %02d %f ", DT_CTL_WORKER_RESERVED + dt_control_get_threadid(),
             dt_get_wtime());
    dt_control_job_print(job);
    dt_print(DT_DEBUG_CONTROL, "\n");
  }

  dt_pthread_mutex_unlock(&job->wait_mutex);

  // remove the job from scheduled job array (for job deduping)
  dt_pthread_mutex_lock(&control->queue_mutex);
  control->job[dt_control_get_threadid()] = NULL;
  if(job->queue == DT_JOB_QUEUE_USER_EXPORT) control->export_scheduled = FALSE;
  dt_pthread_mutex_unlock(&control->queue_mutex);

  // and free it
  dt_control_job_dispose(job);

  return 0;
}

void dt_control_job_wait(dt_job_t *j)
{
  int state = dt_control_job_get_state (j);

  /* if job execution not is finished let's wait for signal */
  if (state==DT_JOB_STATE_RUNNING || state==DT_JOB_STATE_CANCELLED)
  {
    dt_pthread_mutex_lock (&j->wait_mutex);
    dt_pthread_mutex_unlock (&j->wait_mutex);
  }

}

void dt_control_job_wait(_dt_job_t *job)
{
  if(!job) return;
  dt_job_state_t state = dt_control_job_get_state(job);

  /* if job execution is not finished let's wait for signal */
  if(state == DT_JOB_STATE_RUNNING || state == DT_JOB_STATE_CANCELLED)
  {
    dt_pthread_mutex_lock(&job->wait_mutex);
    dt_pthread_mutex_unlock(&job->wait_mutex);
  }
}

static void *dt_control_worker_kicker(void *ptr)
{
  dt_control_t *control = (dt_control_t *)ptr;
  while(dt_control_running())
  {
    sleep(2);
    dt_pthread_mutex_lock(&control->cond_mutex);
    pthread_cond_broadcast(&control->cond);
    dt_pthread_mutex_unlock(&control->cond_mutex);
  }
  return NULL;
}

void dt_control_shutdown(dt_control_t *s)
{
  dt_pthread_mutex_lock(&s->cond_mutex);
  dt_pthread_mutex_lock(&s->run_mutex);
  s->running = 0;
  dt_pthread_mutex_unlock(&s->run_mutex);
  dt_pthread_mutex_unlock(&s->cond_mutex);
  pthread_cond_broadcast(&s->cond);

  /* first wait for kick_on_workers_thread */
  pthread_join(s->kick_on_workers_thread, NULL);

  int k;
  for(k = 0; k < s->num_threads; k++)
    // pthread_kill(s->thread[k], 9);
    pthread_join(s->thread[k], NULL);
  for(k = 0; k < DT_CTL_WORKER_RESERVED; k++)
    // pthread_kill(s->thread_res[k], 9);
    pthread_join(s->thread_res[k], NULL);

}

void dt_control_set_mouse_over_id(int32_t value)
{
  dt_pthread_mutex_lock(&(darktable.control->global_mutex));
  if(darktable.control->mouse_over_id != value)
  {
    darktable.control->mouse_over_id = value;
    dt_pthread_mutex_unlock(&(darktable.control->global_mutex));
    dt_control_signal_raise(darktable.signals, DT_SIGNAL_MOUSE_OVER_IMAGE_CHANGE);
  }
  else
    dt_pthread_mutex_unlock(&(darktable.control->global_mutex));
}

int dt_cache_remove(dt_cache_t *cache, const uint32_t key)
{
  gpointer orig_key, value;
  gboolean res;
  int result;
  dt_cache_entry_t *entry;
restart:
  dt_pthread_mutex_lock(&cache->lock);

  res = g_hash_table_lookup_extended(
      cache->hashtable, GINT_TO_POINTER(key), &orig_key, &value);
  entry = (dt_cache_entry_t *)value;
  if(!res)
  { // not found in cache, not deleting.
    dt_pthread_mutex_unlock(&cache->lock);
    return 1;
  }
  // need write lock to be able to delete:
  result = dt_pthread_rwlock_trywrlock(&entry->lock);
  if(result)
  {
    dt_pthread_mutex_unlock(&cache->lock);
    g_usleep(5);
    goto restart;
  }

  if(entry->_lock_demoting)
  {
    // oops, we are currently demoting (rw -> r) lock to this entry in some thread. do not touch!
    dt_pthread_rwlock_unlock(&entry->lock);
    dt_pthread_mutex_unlock(&cache->lock);
    g_usleep(5);
    goto restart;
  }

  gboolean removed = g_hash_table_remove(cache->hashtable, GINT_TO_POINTER(key));
  (void)removed; // make non-assert compile happy
  assert(removed);
  cache->lru = g_list_delete_link(cache->lru, entry->link);

  if(cache->cleanup)
    cache->cleanup(cache->cleanup_data, entry);
  else
    dt_free_align(entry->data);
  dt_pthread_rwlock_unlock(&entry->lock);
  dt_pthread_rwlock_destroy(&entry->lock);
  cache->cost -= entry->cost;
  g_slice_free1(sizeof(*entry), entry);

  dt_pthread_mutex_unlock(&cache->lock);
  return 0;
}

gboolean dt_lua_lock()
{
  gboolean had_lock = dt_control_gdk_haslock();
  if(had_lock){
    dt_control_gdk_unlock();
  }
  if(!darktable.lua_state.ending && pthread_equal(darktable.control->gui_thread,pthread_self()) != 0) {
    dt_print(DT_DEBUG_LUA,"LUA WARNING locking from the gui thread should be avoided\n");
  }

  dt_pthread_mutex_lock(&darktable.lua_state.mutex);
  return had_lock;
}