diff options
Diffstat (limited to 'nuttx/examples/pipe/interlock_test.c')
-rw-r--r-- | nuttx/examples/pipe/interlock_test.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/nuttx/examples/pipe/interlock_test.c b/nuttx/examples/pipe/interlock_test.c deleted file mode 100644 index e049a65f6..000000000 --- a/nuttx/examples/pipe/interlock_test.c +++ /dev/null @@ -1,224 +0,0 @@ -/**************************************************************************** - * examples/pipe/interlock_test.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 <nuttx/config.h> -#include <sys/stat.h> - -#include <sys/types.h> - -#include <stdio.h> -#include <fcntl.h> -#include <unistd.h> -#include <errno.h> - -#include "pipe.h" - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: null_writer - ****************************************************************************/ - -static void *null_writer(pthread_addr_t pvarg) -{ - int fd; - - /* Wait a bit */ - - printf("null_writer: started -- sleeping\n"); - sleep(5); - - /* Then open the FIFO for write access */ - - printf("null_writer: Opening FIFO for write access\n"); - fd = open(FIFO_PATH2, O_WRONLY); - if (fd < 0) - { - fprintf(stderr, "null_writer: Failed to open FIFO %s for writing, errno=%d\n", - FIFO_PATH2, errno); - return (void*)1; - } - - /* Wait a bit more */ - - printf("null_writer: Opened %s for writing -- sleeping\n", FIFO_PATH2); - sleep(5); - - /* Then close the FIFO */ - - printf("null_writer: Closing %s\n", FIFO_PATH2); - if (close(fd) != 0) - { - fprintf(stderr, "null_writer: close failed: %d\n", errno); - } - sleep(5); - - printf("null_writer: Returning success\n"); - return (void*)0; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: interlock_test - ****************************************************************************/ - -int interlock_test(void) -{ - pthread_t writerid; - void *value; - char data[16]; - ssize_t nbytes; - int fd; - int ret; - - /* Create a FIFO */ - - ret = mkfifo(FIFO_PATH2, 0666); - if (ret < 0) - { - fprintf(stderr, "interlock_test: mkfifo failed with errno=%d\n", errno); - return 1; - } - - /* Start the null_writer_thread */ - - printf("interlock_test: Starting null_writer thread\n"); - ret = pthread_create(&writerid, NULL, null_writer, (pthread_addr_t)NULL); - if (ret != 0) - { - fprintf(stderr, "interlock_test: Failed to create null_writer thread, error=%d\n", ret); - ret = 2; - goto errout_with_fifo; - } - - /* Open one end of the FIFO for reading. This open call should block until the - * null_writer thread opens the other end of the FIFO for writing. - */ - - printf("interlock_test: Opening FIFO for read access\n"); - fd = open(FIFO_PATH2, O_RDONLY); - if (fd < 0) - { - fprintf(stderr, "interlock_test: Failed to open FIFO %s for reading, errno=%d\n", - FIFO_PATH2, errno); - ret = 3; - goto errout_with_thread; - } - - /* Attempt to read one byte from the FIFO. This should return end-of-file because - * the null_writer closes the FIFO without writing anything. - */ - - printf("interlock_test: Reading from %s\n", FIFO_PATH2); - nbytes = read(fd, data, 16); - if (nbytes < 0 ) - { - fprintf(stderr, "interlock_test: read failed, errno=%d\n", errno); - ret = 4; - goto errout_with_file; - } - else if (ret != 0) - { - fprintf(stderr, "interlock_test: Read %d bytes of data -- aborting: %d\n", nbytes); - ret = 5; - goto errout_with_file; - } - - /* Close the file */ - - printf("interlock_test: Closing %s\n", FIFO_PATH2); - if (close(fd) != 0) - { - fprintf(stderr, "interlock_test: close failed: %d\n", errno); - } - - /* Wait for null_writer thread to complete */ - - printf("interlock_test: Waiting for null_writer thread\n"); - ret = pthread_join(writerid, &value); - if (ret != 0) - { - fprintf(stderr, "interlock_test: pthread_join failed, error=%d\n", ret); - ret = 6; - goto errout_with_fifo; - } - else - { - printf("interlock_test: writer returned %d\n", (int)value); - if (value != (void*)0) - { - ret = 7; - goto errout_with_fifo; - } - } - - /* unlink(FIFO_PATH2); */ - printf("interlock_test: Returning success\n"); - return 0; - -errout_with_file: - if (close(fd) != 0) - { - fprintf(stderr, "interlock_test: close failed: %d\n", errno); - } -errout_with_thread: - pthread_detach(writerid); - pthread_cancel(writerid); -errout_with_fifo: - /* unlink(FIFO_PATH2); */ - printf("interlock_test: Returning %d\n", ret); - return ret; -} |