uvm_objection/uvm_objection_events/test_done_objection/callbacks_objection/objection_callback

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uvm_objection/uvm_objection_events/test_done_objection/callbacks_objection/objection_callback

 (2011-10-20 09:52:54)

preface

 uvm_objection是在uvm_object上扩展出来的一个专门针对数据单元的类。该类也用来协调多个component的行动

  ie:the ~uvm_test_done~ built-in objection provides a means for
// coordinating when to end a test, i.e. when to call <global_stop_request> to
// end the <uvm_component::run> phase.  When all participating components have
// dropped their raised objections with ~uvm_test_done~, an implicit call to
// ~global_stop_request~ is issued

 1.uvm_objection_events是一个内部类，作用：里边记录的是某个component在等待本objection raised dropped all_dropped 发生，同一component每等待一次 waiters++

     int waiters;     
    event raised;    
    event dropped;   
    event all_dropped;

 2.uvm_objection_context_object这是一个内部的类，定义了一些属性，在uvm_objection中声明了一个这个类的pool，该类主要记录了一个component到objection的映射关系，为这个映射关系提供了描述，定义了一个count来为每次objection调用component的raised等方法提供一个数字

  uvm_object obj;
   uvm_object source_obj;
   string description;
   int count;
 3. uvm_objection extends uvm_report_object

  protected bit    m_trace_mode=0;//记录目标活动使能
  protected int    m_source_count[uvm_object];//某个component raised count
  protected int    m_total_count [uvm_object]; //某个component及其子孙共raised的count
  protected time   m_drain_time  [uvm_object];//某个component的drain time
  protected bit    m_draining   [uvm_object];//某个component 正在draining
  protected uvm_objection_events m_events [uvm_object];//记录某个component的raised dropped等情况
 bit    m_top_all_dropped;//top是否all_dropped
  protected process m_background_proc;

  protected uvm_root m_top = uvm_root::get();

  static uvm_objection m_objections[$];//全局的对象，记录了所有的objection

  local uvm_objection_context_object m_context_pool[$];
  local uvm_objection_context_object m_scheduled_list[$];

  bit m_hier_mode = 1;

  uvm_root top = uvm_root::get();

  protected bit m_cleared = 0;

  3.1 function new(string name="");//根据命令行的情况设置m_t