mrbuf_test.c

/*
 * mrbuffer.c magic ring buffer
 *
 * Copyright (C) 2016 Seongmyun Cho <highsky@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 2 of the License.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include <stdio.h>
#include <string.h>
#include "mrbuffer.h"

#define LEN (1024*3-256)
char data[LEN];

int main(int argc, char *argv[]) {
  struct mrbuffer *mrbuf;
  size_t len;
  int i;

  for (i = 0; i < LEN; i++)
    data[i] = i & 0xff ;

  mrbuf = mrbuffer_alloc(MRBUF_FLAG_SHMAT, 0);
  //mrbuf = mrbuffer_alloc(MRBUF_FLAG_MMAP, 0);

  len = mrbuffer_write(mrbuf, LEN, data);
  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  len = mrbuffer_read(mrbuf, LEN, data);
  len = mrbuffer_write(mrbuf, LEN, data);

  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  len = mrbuffer_read(mrbuf, LEN, data);
  len = mrbuffer_write(mrbuf, LEN, data);

  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  len = mrbuffer_read(mrbuf, LEN, data);
  len = mrbuffer_write(mrbuf, LEN, data);

  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  len = mrbuffer_read(mrbuf, LEN, data);
  len = mrbuffer_write(mrbuf, LEN, data);

  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  len = mrbuffer_write(mrbuf, LEN, data);
  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  len = mrbuffer_write(mrbuf, LEN, data);
  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), \
         MRBUF_READ_OFFSET(mrbuf), \
         MRBUF_FREE_LEN(mrbuf));

  if (MRBUF_FULL(mrbuf))
    printf("buffer full(data len): %lu\n", MRBUF_DATA_LEN(mrbuf));

  len = mrbuffer_read(mrbuf, LEN, data);
  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), MRBUF_READ_OFFSET(mrbuf), len);
  len = mrbuffer_read(mrbuf, LEN, data);
  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), MRBUF_READ_OFFSET(mrbuf), len);
  len = mrbuffer_read(mrbuf, LEN, data);
  printf("h:%04lu t:%04lu %04lu\n", \
         MRBUF_WRITE_OFFSET(mrbuf), MRBUF_READ_OFFSET(mrbuf), len);

  if (MRBUF_EMPTY(mrbuf))
    printf("buffer empty(free len): %lu\n", MRBUF_FREE_LEN(mrbuf));

  if (MRBUF_FREE_LEN(mrbuf) >= LEN) {
    printf("write mrbuf using memcpy\n");
    memcpy(MRBUF_WRITE_ADDR(mrbuf), data, LEN);
    /* this must be done to update write pointer after every writes */
    len = mrbuffer_give(mrbuf, LEN);
    printf("h:%04lu t:%04lu %04lu\n", \
           MRBUF_WRITE_OFFSET(mrbuf), \
           MRBUF_READ_OFFSET(mrbuf), \
           len);
  }

  if (!memcmp(mrbuf->vaddr, mrbuf->vaddr + mrbuf->size, mrbuf->size))
    printf("mrbuffer is working\n");


  mrbuffer_free(mrbuf);

  return 0;
}