diff options
| -rw-r--r-- | nuttx/fs/Makefile | 10 | ||||
| -rw-r--r-- | nuttx/fs/fs_poll.c | 97 | ||||
| -rw-r--r-- | nuttx/include/poll.h | 125 |
3 files changed, 227 insertions, 5 deletions
diff --git a/nuttx/fs/Makefile b/nuttx/fs/Makefile index 8ab6635ab..1ffa5b5f5 100644 --- a/nuttx/fs/Makefile +++ b/nuttx/fs/Makefile @@ -41,13 +41,13 @@ AOBJS = $(ASRCS:.S=$(OBJEXT)) CSRCS = ifeq ($(CONFIG_NFILE_DESCRIPTORS),0) ifneq ($(CONFIG_NSOCKET_DESCRIPTORS),0) -CSRCS += fs_close.c fs_write.c fs_ioctl.c +CSRCS += fs_close.c fs_write.c fs_ioctl.c fs_poll.c endif else -CSRCS += fs_open.c fs_close.c fs_read.c fs_write.c fs_ioctl.c fs_lseek.c \ - fs_dup.c fs_mmap.c fs_opendir.c fs_closedir.c fs_stat.c fs_readdir.c \ - fs_readdirr.c fs_seekdir.c fs_telldir.c fs_rewinddir.c fs_files.c \ - fs_inode.c fs_inodefind.c fs_inodereserve.c fs_statfs.c \ +CSRCS += fs_open.c fs_close.c fs_read.c fs_write.c fs_ioctl.c fs_poll.c \ + fs_lseek.c fs_dup.c fs_mmap.c fs_opendir.c fs_closedir.c fs_stat.c \ + fs_readdir.c fs_readdirr.c fs_seekdir.c fs_telldir.c fs_rewinddir.c \ + fs_files.c fs_inode.c fs_inodefind.c fs_inodereserve.c fs_statfs.c \ fs_inoderemove.c fs_registerdriver.c fs_unregisterdriver.c \ fs_inodeaddref.c fs_inoderelease.c CSRCS += fs_registerblockdriver.c fs_unregisterblockdriver.c \ diff --git a/nuttx/fs/fs_poll.c b/nuttx/fs/fs_poll.c new file mode 100644 index 000000000..7b1db1f41 --- /dev/null +++ b/nuttx/fs/fs_poll.c @@ -0,0 +1,97 @@ +/**************************************************************************** + * fs/fs_poll.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/types.h> +#include <poll.h> +#include <errno.h> + +#include <nuttx/fs.h> +#include "fs_internal.h" + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: poll + * + * Description: + * poll() waits for one of a set of file descriptors to become ready to + * perform I/O. If none of the events requested (and no error) has + * occurred for any of the file descriptors, then poll() blocks until + * one of the events occurs. + * + * Inputs: + * fds - List of structures describing file descriptors to be monitored + * nfds - The number of entries in the list + * timeout - Specifies an upper limit on the time for which poll() will + * block in milliseconds. A negative value of timeout means an infinite + * timeout. + * + * Return: + * On success, the number of structures that have nonzero revents fields. + * A value of 0 indicates that the call timed out and no file descriptors + * were ready. On error, -1 is returned, and errno is set appropriately: + * + * EBADF - An invalid file descriptor was given in one of the sets. + * EFAULT - The fds address is invalid + * EINTR - A signal occurred before any requested event. + * EINVAL - The nfds value exceeds a system limit. + * ENOMEM - There was no space to allocate internal data structures. + * ENOSYS - One or more of the drivers supporting the file descriptor + * does not support the poll method. + * + ****************************************************************************/ + +int poll(FAR struct pollfd *fds, nfds_t nfds, int timeout) +{ +#ifdef CONFIG_CPP_HAVE_WARNING +# warning To be provided +#endif + + errno = ENOSYS; + return ERROR; +} + diff --git a/nuttx/include/poll.h b/nuttx/include/poll.h new file mode 100644 index 000000000..1dd6fc180 --- /dev/null +++ b/nuttx/include/poll.h @@ -0,0 +1,125 @@ +/**************************************************************************** + * include/poll.h + * + * 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. + * + ****************************************************************************/ + +#ifndef __INCLUDE_POLL_H +#define __INCLUDE_POLL_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> +#include <semaphore.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* Poll event definitions: + * + * POLLIN + * Data other than high-priority data may be read without blocking. + * POLLRDNORM + * Normal data may be read without blocking. + * POLLRDBAND + * Priority data may be read without blocking. + * POLLPRI + * High priority data may be read without blocking. + * POLLOUT + * Normal data may be written without blocking. + * POLLWRNORM + * Equivalent to POLLOUT. + * POLLWRBAND + * Priority data may be written. + * POLLERR + * An error has occurred (revents only). + * POLLHUP + * Device has been disconnected (revents only). + * POLLNVAL + * Invalid fd member (revents only). + */ + +#define POLLIN (0x01) /* NuttX does not make priority distinctions */ +#define POLLRDNORM (0x01) +#define POLLRDBAND (0x01) +#define POLLPRI (0x01) + +#define POLLOUT (0x02) /* NuttX does not make priority distinctions */ +#define POLLWRNORM (0x02) +#define POLLWRBAND (0x02) + +#define POLLERR (0x04) +#define POLLHUP (0x08) +#define POLLNVAL (0x10) + +/**************************************************************************** + * Public Type Definitions + ****************************************************************************/ + +typedef unsigned int nfds_t; + +struct pollfd +{ + int fd; /* The descriptor being polled */ + sem_t *sem; /* Pointer to semaphore used to post output event */ + ubyte events; /* The input event flags */ + ubyte revents; /* The output event flags */ +}; + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" { +#else +#define EXTERN extern +#endif + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +EXTERN int poll(FAR struct pollfd *fds, nfds_t nfds, int timeout); + +#undef EXTERN +#if defined(__cplusplus) +} +#endif + +#endif /* __INCLUDE_POLL_H */ |