uvm中get_transaction_id的用法

  // Function: get_transaction_id
  //
  // Returns this transaction's numeric identifier, which is -1 if not set
  // explicitly by ~set_transaction_id~.
  //
  // When using a <uvm_sequence #(REQ,RSP)> to generate stimulus, the transaction 
  // ID is used along with the sequence ID to route responses in sequencers and to correlate
  // responses to requests.

  extern function integer get_transaction_id();

// set_transaction_id
function void uvm_transaction::set_transaction_id(integer id);
    m_transaction_id = id;
endfunction

// get_transaction_id
function integer uvm_transaction::get_transaction_id();
    return (m_transaction_id);
endfunction

// new
function uvm_transaction::new (string name="", uvm_component initiator = null);
  super.new(name);
  this.initiator = initiator;
  m_transaction_id = -1;
  begin_event = events.get("begin");
  end_event = events.get("end");
endfunction // uvm_transaction