fork join的label(tag)

https://bbs.eetop.cn/thread-883536-1-1.html

其中只要有任何一个线程结束，都退出并行运行块，并打印DONE。要求分别用fork-join、fork-join_any，fork-join_none来实现.

实现基于label的方法会非常容易。由于label本身范围更广，比disable fork控制的更容易（在线程里写disable fork就没有意义），所以直接实现了。

至于使用process类，简单好用，不会误伤到同名的线程，但是实际测试过程中，如果是同一个time-solt，那可能会都执行了，我代码的问题？。

module taa ();
    initial begin
        fork:thread_label
            begin
                #2 $display("a thread1");
                disable thread_label;
            end
            begin
                #3 $display("a thread2");
                disable thread_label;
            end
            begin
                #4 $display("a thread3");
                disable thread_label;
            end
        join

        $display("this is the end of fork join");
        #10 ;
    end


    initial begin
        fork
            begin
                #1 $display("a fork any thread1");
            end
            begin
                $display("a fork any thread2");
            end
            begin
                $display("a fork any thread3");
            end
        join_any

        $display("this is the end of fork any");
        disable fork;
        #10 ;
    end

    initial begin
        event e1;
        fork:thread_label3
            begin
                #1 $display("a fork none thread_label3 thread1");
                disable thread_label3;
            end
            begin
                $display("a fork none thread_label3 thread2");
                disable thread_label3;
            end
            begin
                $display("a fork none thread_label3 thread3");
                disable thread_label3;
            end
        join_none

        wait fork;
        $display("this is the end of fork none");
        #10 ;

    end

    initial begin
        process jobs[]=new[3];

        fork 
            begin
                jobs[0]=process::self;
                #13 $display("a fork in thread1");
            end
            begin
                jobs[1]=process::self;
                #12 $display("a fork in thread2");
            end
            begin
                jobs[2]=process::self;
                #12 $display("a fork in thread3");
            end
        join_none

        foreach(jobs[i]) begin
            wait(jobs[i]!=null);
        end

        fork 
            jobs[0].await();
            jobs[1].await();
            jobs[2].await();
        join_any

        foreach (jobs[j]) begin
            if(jobs[j].status != process::FINISHED )
                jobs[j].kill();
        end

        $display("the end of process");
        #10;

    end
endmodule

输出

a fork any thread2
this is the end of fork any
a fork none thread_label3 thread2
this is the end of fork none
a thread1
this is the end of fork join
a fork in thread2
a fork in thread3
the end of process

标签：fork,begin,end,thread,28,display,xx,jobs,杂项
来源： https://www.cnblogs.com/bai2022/p/15757251.html