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RIOT/tests/pipe/main.c 3.49 KB
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  /*
   * Copyright (C) 2014  René Kijewski  <rene.kijewski@fu-berlin.de>
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   */
  
  /**
   * @ingroup     tests
   * @{
   * @file
   * @brief       Test for module pipe.
   * @author      René Kijewski <rene.kijewski@fu-berlin.de>
   * @}
   */
  
  #include <stdio.h>
  #include <inttypes.h>
  
  #include "thread.h"
  #include "pipe.h"
  #include "pipe.h"
  
  #define BYTES_TOTAL (26)
  
  static char stacks[2][THREAD_STACKSIZE_MAIN];
  
  static char pipe_bufs[2][6];
  static ringbuffer_t rbs[2];
  
  static pipe_t pipes[2];
  
  static void *run_middle(void *arg)
  {
      (void) arg;
  
      unsigned read_total = 0;
      while (read_total < BYTES_TOTAL) {
          char buf[4];
          unsigned read = pipe_read(&pipes[0], buf, sizeof (buf));
          unsigned read_start = read_total;
          read_total += read;
          printf("Middle read: <%.*s> [%u:%u]\n", read, buf,
                 read_start, read_total);
  
          unsigned written_total = 0;
          while (written_total < read) {
              int written = pipe_write(&pipes[1], &buf[written_total],
                                       read - written_total);
              written_total += written;
          }
      }
  
      puts("Middle done.");
      return NULL;
  }
  
  static void *run_end(void *arg)
  {
      (void) arg;
  
      unsigned read_total = 0;
      while (read_total < BYTES_TOTAL) {
          char buf[3];
          int read = pipe_read(&pipes[1], buf, sizeof (buf));
          unsigned read_start = read_total;
          read_total += read;
          printf("End read: <%.*s> [%u:%u]\n", read, buf,
                 read_start, read_total);
      }
  
      puts("End done.");
      return NULL;
  }
  
  static unsigned min(unsigned a, unsigned b)
  {
      return a < b ? a : b;
  }
  
  int main(void)
  {
      puts("Start.");
  
      for (int i = 0; i < 2; ++i) {
          ringbuffer_init(&rbs[i], pipe_bufs[i], sizeof (pipe_bufs[i]));
          pipe_init(&pipes[i], &rbs[i], NULL);
      }
  
      thread_create(stacks[0], sizeof (stacks[0]),
                    THREAD_PRIORITY_MAIN,
                    THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
                    run_middle, NULL, "middle");
      thread_create(stacks[1], sizeof (stacks[1]),
                    THREAD_PRIORITY_MAIN,
                    THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
                    run_end, NULL, "end");
  
      unsigned total = 0;
      while (total < BYTES_TOTAL) {
          char buf[5];
          unsigned bytes_cur = min(BYTES_TOTAL - total, sizeof (buf));
          for (unsigned i = 0; i < bytes_cur; ++i) {
              buf[i] = 'A' + total;
              ++total;
          }
  
          unsigned written_total = 0;
          while (written_total < bytes_cur) {
              int written = pipe_write(&pipes[0], &buf[written_total],
                                       bytes_cur - written_total);
              written_total += written;
          }
      }
  
      puts("Main done.");
      return 0;
  }