Subversion Repositories openrisc_2011-10-31

#include <cyg/kernel/kapi.h>

#include <stdio.h>

#include <math.h>

#include <stdlib.h>

/* now declare (and allocate space for) some kernel objects,

   like the two threads we will use */

cyg_thread thread_s[2];         /* space for two thread objects */

char stack[2][4096];            /* space for two 4K stacks */

/* now the handles for the threads */

cyg_handle_t simple_threadA, simple_threadB;

/* and now variables for the procedure which is the thread */

cyg_thread_entry_t simple_program;

/* and now a mutex to protect calls to the C library */

cyg_mutex_t cliblock;

/* we install our own startup routine which sets up threads */

void cyg_user_start(void)

{

  printf("Entering twothreads' cyg_user_start() function\n");

  cyg_mutex_init(&cliblock);

  cyg_thread_create(4, simple_program, (cyg_addrword_t) 0,

                    "Thread A", (void *) stack[0], 4096,

                    &simple_threadA, &thread_s[0]);

  cyg_thread_create(4, simple_program, (cyg_addrword_t) 1,

                    "Thread B", (void *) stack[1], 4096,

                    &simple_threadB, &thread_s[1]);

  cyg_thread_resume(simple_threadA);

  cyg_thread_resume(simple_threadB);

}

/* this is a simple program which runs in a thread */

void simple_program(cyg_addrword_t data)

{

  int message = (int) data;

  int delay;

  printf("Beginning execution; thread data is %d\n", message);

  cyg_thread_delay(200);

  for (;;) {

    delay = 200 + (rand() % 50);

    /* note: printf() must be protected by a

       call to cyg_mutex_lock() */

    cyg_mutex_lock(&cliblock); {

      printf("Thread %d: and now a delay of %d clock ticks\n",

             message, delay);

    }

    cyg_mutex_unlock(&cliblock);

    cyg_thread_delay(delay);

  }

}