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/****************************************************************************
* sched/sched_setuptaskfiles.c
*
* Copyright (C) 2007, 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 <sched.h>
#include <errno.h>
#include <nuttx/fs.h>
#include <nuttx/net.h>
#include "os_internal.h"
#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Determine how many file descriptors to clone. If CONFIG_FDCLONE_DISABLE
* is set, no file descriptors will be cloned. If CONFIG_FDCLONE_STDIO is
* set, only the first three descriptors (stdin, stdout, and stderr) will
* be cloned. Otherwise all file descriptors will be cloned.
*/
#if defined(CONFIG_FDCLONE_STDIO) && CONFIG_NFILE_DESCRIPTORS > 3
# define NFDS_TOCLONE 3
#else
# define NFDS_TOCLONE CONFIG_NFILE_DESCRIPTORS
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: sched_setuptaskfiles
*
* Description:
* Configure a newly allocated TCB so that it will inherit
* file descriptors and streams from the parent task.
*
* Parameters:
* tcb - tcb of the new task.
*
* Return Value:
* None
*
* Assumptions:
*
****************************************************************************/
int sched_setuptaskfiles(FAR _TCB *tcb)
{
#if CONFIG_NFILE_DESCRIPTORS > 0
FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head;
int i;
#endif /* CONFIG_NFILE_DESCRIPTORS > 0 */
int ret = OK;
#if CONFIG_NFILE_DESCRIPTORS > 0
/* Allocate file descriptors for the TCB */
tcb->filelist = files_alloclist();
if (!tcb->filelist)
{
*get_errno_ptr() = ENOMEM;
return ERROR;
}
#endif /* CONFIG_NFILE_DESCRIPTORS */
#if CONFIG_NSOCKET_DESCRIPTORS > 0
/* Allocate socket descriptors for the TCB */
tcb->sockets = net_alloclist();
if (!tcb->sockets)
{
*get_errno_ptr() = ENOMEM;
return ERROR;
}
#endif /* CONFIG_NSOCKET_DESCRIPTORS */
#if CONFIG_NFILE_DESCRIPTORS > 0
#if !defined(CONFIG_FDCLONE_DISABLE)
/* Duplicate the file descriptors. This will be either all of the
* file descriptors or just the first three (stdin, stdout, and stderr)
* if CONFIG_FDCLONE_STDIO is defined. NFSDS_TOCLONE is set
* accordingly above.
*/
if (rtcb->filelist)
{
for (i = 0; i < NFDS_TOCLONE; i++)
{
/* Check if this file is opened */
if (rtcb->filelist->fl_files[i].f_inode)
{
(void)files_dup(&rtcb->filelist->fl_files[i],
&tcb->filelist->fl_files[i]);
}
}
}
#endif
#if CONFIG_NFILE_STREAMS > 0
/* Allocate file streams for the TCB */
ret = sched_setupstreams(tcb);
#endif /* CONFIG_NFILE_STREAMS */
#endif /* CONFIG_NFILE_DESCRIPTORS */
#if CONFIG_NSOCKET_DESCRIPTORS > 0 && !defined(CONFIG_SDCLONE_DISABLE)
/* Duplicate the socket descriptors */
if (rtcb->sockets)
{
for (i = 0; i < CONFIG_NSOCKET_DESCRIPTORS; i++)
{
/* Check if this socket is allocated */
if (rtcb->sockets->sl_sockets[i].s_crefs > 0)
{
(void)net_clone(&rtcb->sockets->sl_sockets[i],
&tcb->sockets->sl_sockets[i]);
}
}
}
#endif
return ret;
}
#endif /* CONFIG_NFILE_DESCRIPTORS || CONFIG_NSOCKET_DESCRIPTORS */
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