diff options
Diffstat (limited to 'nuttx/drivers/pipes/fifo.c')
-rw-r--r-- | nuttx/drivers/pipes/fifo.c | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/nuttx/drivers/pipes/fifo.c b/nuttx/drivers/pipes/fifo.c deleted file mode 100644 index 03aafd0f0..000000000 --- a/nuttx/drivers/pipes/fifo.c +++ /dev/null @@ -1,139 +0,0 @@ -/**************************************************************************** - * drivers/pipes/fifo.c - * - * Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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/types.h> -#include <stdint.h> -#include <nuttx/fs/fs.h> -#include <errno.h> - -#include "pipe_common.h" - -#if CONFIG_DEV_PIPE_SIZE > 0 - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -static const struct file_operations fifo_fops = -{ - pipecommon_open, /* open */ - pipecommon_close, /* close */ - pipecommon_read, /* read */ - pipecommon_write, /* write */ - 0, /* seek */ - 0 /* ioctl */ -#ifndef CONFIG_DISABLE_POLL - , pipecommon_poll /* poll */ -#endif -}; - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mkfifo - * - * Description: - * mkfifo() makes a FIFO device driver file with name 'pathname.' Unlike - * Linux, a NuttX FIFO is not a special file type but simply a device driver - * instance. 'mode' specifies the FIFO's permissions. - * - * Once the FIFO has been created by mkfifo(), any thread can open it for - * reading or writing, in the same way as an ordinary file. However, it must - * have been opened from both reading and writing before input or output - * can be performed. This FIFO implementation will block all attempts to - * open a FIFO read-only until at least one thread has opened the FIFO for - * writing. - * - * If all threads that write to the FIFO have closed, subsequent calls to - * read() on the FIFO will return 0 (end-of-file). - * - * Inputs: - * pathname - The full path to the FIFO instance to attach to or to create - * (if not already created). - * mode - Ignored for now - * - * Return: - * 0 is returned on success; otherwise, -1 is returned with errno set - * appropriately. - * - ****************************************************************************/ - -int mkfifo(FAR const char *pathname, mode_t mode) -{ - struct pipe_dev_s *dev; - int ret; - - /* Allocate and initialize a new device structure instance */ - - dev = pipecommon_allocdev(); - if (!dev) - { - return -ENOMEM; - } - - ret = register_driver(pathname, &fifo_fops, mode, (void*)dev); - if (ret != 0) - { - pipecommon_freedev(dev); - } - - return ret; -} - -#endif /* CONFIG_DEV_PIPE_SIZE > 0 */ |