/****************************************************************************
* pipe_main.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
/****************************************************************************
* Definitions
****************************************************************************/
#ifndef CONFIG_EXAMPLES_FIFO_PATH
# define CONFIG_EXAMPLES_FIFO_PATH "/tmp/testfifo"
#endif
#define MAX_BYTE 13
#define WRITE_SIZE MAX_BYTE
#define NWRITES 1400
#define NWRITE_BYTES (NWRITES * WRITE_SIZE)
#define READ_SIZE (2*MAX_BYTE)
#define NREADS (NWRITES / 2)
#define NREAD_BYTES NWRITE_BYTES
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: reader
****************************************************************************/
static void *reader(pthread_addr_t pvarg)
{
char buffer[READ_SIZE];
int fd = (int)pvarg;
int ret;
int nbytes;
int value;
int ndx;
printf("reader: started\n");
for (nbytes = 0, value = 0; nbytes < NREAD_BYTES;)
{
ret = read(fd, buffer, READ_SIZE);
if (ret < 0 )
{
fprintf(stderr, "reader: read failed, errno=%d\n", errno);
return (void*)1;
}
else if (ret == 0)
{
#warning BUG: pipe should return zero when writer closes
fprintf(stderr, "reader: Received zero bytes\n");
return (void*)2;
}
for (ndx = 0; ndx < ret; ndx++)
{
if (value >= WRITE_SIZE)
{
value = 0;
}
if (buffer[ndx] != value)
{
fprintf(stderr, "reader: Byte %d, expected %d, found %d\n",
nbytes + ndx, value, buffer[ndx]);
return (void*)3;
}
value++;
}
nbytes += ret;
}
printf("reader: %d bytes read\n", nbytes);
return (void*)0;
}
/****************************************************************************
* Name: writer
****************************************************************************/
static void *writer(pthread_addr_t pvarg)
{
char buffer[WRITE_SIZE];
int fd = (int)pvarg;
int ret;
int i;
printf("writer: started\n");
for (i = 0; i < WRITE_SIZE; i++)
{
buffer[i] = i;
}
for (i = 0; i < NWRITES; i++)
{
ret = write(fd, buffer, WRITE_SIZE);
if (ret < 0 )
{
fprintf(stderr, "writer: write failed, errno=%d\n", errno);
return (void*)1;
}
else if (ret != WRITE_SIZE)
{
fprintf(stderr, "writer: Unexpected write size=%d\n", ret);
return (void*)2;
}
}
printf("writer: %d bytes written\n", NWRITE_BYTES);
return (void*)0;
}
/****************************************************************************
* Name: perform_test
****************************************************************************/
static int perform_test(int fdin, int fdout)
{
pthread_t readerid;
pthread_t writerid;
void *value;
int tmp;
int ret;
/* Start reader thread */
printf("perform_test: Starting reader thread\n");
ret = pthread_create(&readerid, NULL, reader, (pthread_addr_t)fdin);
if (ret != 0)
{
fprintf(stderr, "perform_test: Failed to create reader thread, error=%d\n", ret);
return -1;
}
/* Start writer thread */
printf("perform_test: Starting writer thread\n");
ret = pthread_create(&writerid, NULL, writer, (pthread_addr_t)fdout);
if (ret != 0)
{
fprintf(stderr, "perform_test: Failed to create writer thread, error=%d\n", ret);
ret = pthread_cancel(readerid);
if (ret != 0)
{
fprintf(stderr, "perform_test: Failed to cancel reader thread, error=%d\n", ret);
}
return -1;
}
/* Wait for writer thread to complete */
printf("perform_test: Waiting for writer thread\n");
ret = pthread_join(writerid, &value);
if (ret != 0)
{
fprintf(stderr, "perform_test: pthread_join failed, error=%d\n", ret);
}
else
{
ret = (int)value;
printf("perform_test: writer returned %d\n", ret);
}
/* Wait for reader thread to complete */
printf("perform_test: Waiting for reader thread\n");
tmp = pthread_join(readerid, &value);
if (tmp != 0)
{
fprintf(stderr, "perform_test: pthread_join failed, error=%d\n", ret);
}
else
{
tmp = (int)value;
printf("perform_test: reader returned %d\n", tmp);
}
if (ret == 0)
{
ret = tmp;
}
printf("perform_test: returning %d\n", ret);
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: user_initialize
****************************************************************************/
void user_initialize(void)
{
}
/****************************************************************************
* Name: user_start
****************************************************************************/
int user_start(int argc, char *argv[])
{
int fdin;
int fdout;
int ret;
/* Test FIFO logic */
printf("user_start: Performing FIFO test\n");
ret = mkfifo(CONFIG_EXAMPLES_FIFO_PATH, 0666);
if (ret < 0)
{
fprintf(stderr, "user_start: mkfifo failed with errno=%d\n", errno);
return 1;
}
fdin = open(CONFIG_EXAMPLES_FIFO_PATH, O_RDONLY);
if (fdin < 0)
{
fprintf(stderr, "user_start: Failed to open FIFO %s for reading, errno=%d\n",
CONFIG_EXAMPLES_FIFO_PATH, errno);
return 2;
}
fdout = open(CONFIG_EXAMPLES_FIFO_PATH, O_WRONLY);
if (fdout < 0)
{
fprintf(stderr, "user_start: Failed to open FIFO %s for writing, errno=%d\n",
CONFIG_EXAMPLES_FIFO_PATH, errno);
close(fdin);
return 3;
}
ret = perform_test(fdin, fdout);
close(fdin);
close(fdout);
unlink(CONFIG_EXAMPLES_FIFO_PATH);
if (ret != 0)
{
fprintf(stderr, "user_start: FIFO test FAILED\n");
return 4;
}
printf("user_start: FIFO test PASSED\n");
/* Test PIPE logic */
printf("user_start: Performing pipe test\n");
/* Not yet implemented */
fflush(stdout);
return 0;
}
