Chapter 7 -- SystemC From Gound 读书心得

1. 开启dynamic process enabler：

    #define SC_INCLUDE_DYNAMIC_PROCESSES
    #include <systemc>

 

2. register dynamic process with void return：

    sc_process_handle hname = // ordinary functionsc_spawn( sc_bind(&funcName, ARGS…)//no return value ,processName ,spawnOptions);sc_process_handle hname = // member functionsc_spawn( sc_bind(&methName, object, ARGS…)//no return ,processName ,spawnOptions);

 

3. register dynamic process with return

   sc_process_handle hname = // ordinary functionsc_spawn( &returnVar ,sc_bind(&funcName, ARGS…) ,processName ,spawnOptions);sc_process_handle hname = // member functionsc_spawn( &returnVar ,sc_bind(&methodName, object, ARGS …) ,processName ,spawnOptions);

  

   以上object指向calling module，通常用this替代。如果所传的参数是ref而不是value，则用

       sc_ref(var)     // reference

       sc_cref(var)    // constant reference

 

   sc_bind 将参数传给类spawned function。sc_process_handle 这个类提供了一种安全的机制用来操作unspawned以及spawned process，而不是依赖于指针。

 

4. spawnOptions

    sc_spawn_option objname;objname.spawn_method();// register as SC_METHODobjname.dont_initialize();objname.set_sensitivity(event_ptr);objname.set_sensitivity(port_ptr);objname.set_sensitivity(interface_ptr);objname.set_sensitivity(event_finder_ptr);objname.set_stack_size(value); // experts only!

 

5. spawned process example

#define SC_INCLUDE_DYNAMIC_PROCESSES#include <systemc>…void spawned_thread() {// This will be spawned cout << "INFO: spawned_thread " << sc_get_current_process_handle().name() << " @ " << sc_time_stamp() << endl; wait(10,SC_NS); cout << "INFO: Exiting" << endl;}void simple_spawn::main_thread() { wait(15,SC_NS); // Unused handle discarded sc_spawn(sc_bind(&spawned_thread)); cout << "INFO: main_thread " << name() << " @ " << sc_time_stamp() << endl; wait(15,SC_NS); cout << "INFO: main_thread stopping " << " @ " << sc_time_stamp() << endl;}

 

sc_process_handle h =sc_spawn(sc_bind(&spawned_thread));// Do some work…// Wait for spawned thread to returnwait(h.terminated_event());

 

 6. SC_FORK  ...  SC_JOIN

 

SC_FORK COMMA_SEPARATED_LIST_OF_SPAWNSSC_JOIN

 

DataStream d1, d2;SC_FORK sc_spawn( sc_bind(&dut::AXI_xmt,this,sc_ref(d1)), "p1"),sc_spawn(sc_bind(&dut::PCIX_rcv,this,sc_ref(d1)),"p2"),sc_spawn(sc_bind(&dut::USB2,this,sc_ref(d1)), "p3"),sc_spawn(sc_bind(&dut::HT1_xtm,this,sc_ref(d2)), "p4"),sc_spawn(sc_bind(&dut::HT2_rcv,this,sc_ref(d2)), "p5")SC_JOIN