How to export the dpi function between c and sv

SystemVerilog
,
4

In reply to zz8318:

That’s better, but certainly not minimal or complete. This worked for me:

package my_common_pkg;
   typedef struct {
      string name;
      int addr;
   } reg_t;
   reg_t reg_arr[$];
   import "DPI-C" context function void get_all_reg();
   export "DPI-C" function exported_sv_function;
   function void exported_sv_function(input reg_t ele);
      reg_arr.push_back(ele);
   endfunction : exported_sv_function  
endpackage: my_common_pkg
package my_test_pkg;
   import my_common_pkg::*;
class A;
   task run;
      get_all_reg;
   endtask 
endclass 
endpackage : my_test_pkg
module top;
   import my_test_pkg::*;
   A h=new;
   initial h.run;
endmodule

Note the changes I had to make get the C++ code to compile

extern "C" {
void exported_sv_function(const reg_t*);
 
void get_all_reg() {
    reg_t reg_element;
        // get infomation
 
    exported_SystemVerilog_function(&reg_element);
}
}  // extern "C"