C++ (Cpp) mmal_component_action_lock示例

示例#1

文件： mmal_port.c 项目： JimmyC543/userland

/** Flush a port */
MMAL_STATUS_T mmal_port_flush(MMAL_PORT_T *port)
{
   MMAL_BUFFER_HEADER_T *buffer = 0;
   MMAL_STATUS_T status;

   if (!port || !port->priv)
      return MMAL_EINVAL;

   LOG_TRACE("%s(%i:%i) port %p", port->component->name,
             (int)port->type, (int)port->index, port);

   if (!port->priv->pf_flush)
      return MMAL_ENOSYS;

   mmal_component_action_lock(port->component);
   LOCK_SENDING(port);
   status = port->priv->pf_flush(port);
   if (status == MMAL_SUCCESS)
   {
      /* Flush our internal queue */
      buffer = port->priv->core->queue_first;
      port->priv->core->queue_first = 0;
      port->priv->core->queue_last = &port->priv->core->queue_first;
   }
   UNLOCK_SENDING(port);
   mmal_component_action_unlock(port->component);

   while (buffer)
   {
      MMAL_BUFFER_HEADER_T *next = buffer->next;
      mmal_port_buffer_header_callback(port, buffer);
      buffer = next;
   }
   return status;
}

示例#2

文件： mmal_port.c 项目： 4leavedclover/userland

static MMAL_STATUS_T mmal_port_disable_internal(MMAL_PORT_T *port)
{
   MMAL_PORT_PRIVATE_CORE_T* core = port->priv->core;
   MMAL_STATUS_T status = MMAL_SUCCESS;
   MMAL_BUFFER_HEADER_T *buffer;

   LOCK_PORT(port);

   if (!port->is_enabled)
      goto end;

   LOCK_SENDING(port);
   port->is_enabled = 0;
   UNLOCK_SENDING(port);

   mmal_component_action_lock(port->component);

   if (core->pool_for_connection)
      mmal_pool_callback_set(core->pool_for_connection, NULL, NULL);

   status = port->priv->pf_disable(port);

   mmal_component_action_unlock(port->component);

   if (status != MMAL_SUCCESS)
   {
      LOG_ERROR("port %p could not be disabled (%s)", port->name, mmal_status_to_string(status));
      LOCK_SENDING(port);
      port->is_enabled = 1;
      UNLOCK_SENDING(port);
      goto end;
   }

   /* Flush our internal queue */
   buffer = port->priv->core->queue_first;
   while (buffer)
   {
      MMAL_BUFFER_HEADER_T *next = buffer->next;
      mmal_port_buffer_header_callback(port, buffer);
      buffer = next;
   }
   port->priv->core->queue_first = 0;
   port->priv->core->queue_last = &port->priv->core->queue_first;

   /* Wait for all the buffers to have come back from the component */
   LOG_DEBUG("%s waiting for %i buffers left in transit", port->name, (int)IN_TRANSIT_COUNT(port));
   IN_TRANSIT_WAIT(port);
   LOG_DEBUG("%s has no buffers left in transit", port->name);

   port->priv->core->buffer_header_callback = NULL;

 end:
   UNLOCK_PORT(port);
   return status;
}

示例#3

文件： mmal_port.c 项目： CSRedRat/userland

static MMAL_STATUS_T mmal_port_disable_locked(MMAL_PORT_T *port)
{
   MMAL_PORT_PRIVATE_CORE_T* core = port->priv->core;
   MMAL_STATUS_T status;

   if (!port->is_enabled)
   {
      LOG_ERROR("port %p is not enabled", port);
      return MMAL_EINVAL;
   }

   LOCK_SENDING(port);
   port->is_enabled = 0;
   UNLOCK_SENDING(port);

   mmal_component_action_lock(port->component);

   if (core->pool_for_connection)
      mmal_pool_callback_set(core->pool_for_connection, NULL, NULL);

   status = port->priv->pf_disable(port);

   mmal_component_action_unlock(port->component);

   if (status != MMAL_SUCCESS)
   {
      LOG_ERROR("port %p could not be disabled (%s)", port->name, mmal_status_to_string(status));
      LOCK_SENDING(port);
      port->is_enabled = 1;
      UNLOCK_SENDING(port);
      return status;
   }

   /* Wait for all the buffers to have come back from the component */
   LOG_DEBUG("%s waiting for %i buffers left in transit", port->name, (int)IN_TRANSIT_COUNT(port));
   IN_TRANSIT_WAIT(port);
   LOG_DEBUG("%s has no buffers left in transit", port->name);

   port->priv->core->buffer_header_callback = NULL;

   if (core->connected_port && port->type == MMAL_PORT_TYPE_OUTPUT)
      mmal_port_disable(core->connected_port);

   return status;
}