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Diffstat (limited to 'nuttx/sched/sched_setupstreams.c')
-rw-r--r-- | nuttx/sched/sched_setupstreams.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/nuttx/sched/sched_setupstreams.c b/nuttx/sched/sched_setupstreams.c new file mode 100644 index 000000000..22895b047 --- /dev/null +++ b/nuttx/sched/sched_setupstreams.c @@ -0,0 +1,98 @@ +/**************************************************************************** + * sched_setupstreams.c + * + * Copyright (C) 2007-2008, 2010-2012 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 <sched.h> +#include <fcntl.h> + +#include <nuttx/fs/fs.h> +#include <nuttx/net/net.h> +#include <nuttx/lib.h> + +/* Make sure that there are file or socket descriptors in the system and + * that some number of streams have been configured. + */ + +#if CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0 +#if CONFIG_NFILE_STREAMS > 0 + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: sched_setupstreams + * + * Description: + * Setup streams data structures that may be used for standard C buffered + * I/O with underlying socket or file desciptors + * + ****************************************************************************/ + +int sched_setupstreams(FAR _TCB *tcb) +{ + /* Allocate file streams for the TCB */ + + tcb->streams = lib_alloclist(); + if (tcb->streams) + { + /* fdopen to get the stdin, stdout and stderr streams. + * The following logic depends on the fact that the library + * layer will allocate FILEs in order. + * + * fd = 0 is stdin (read-only) + * fd = 1 is stdout (write-only, append) + * fd = 2 is stderr (write-only, append) + */ + + (void)fs_fdopen(0, O_RDONLY, tcb); + (void)fs_fdopen(1, O_WROK|O_CREAT, tcb); + (void)fs_fdopen(2, O_WROK|O_CREAT, tcb); + } + + return OK; +} + +#endif /* CONFIG_NFILE_STREAMS > 0 */ +#endif /* CONFIG_NFILE_DESCRIPTORS > 0 || CONFIG_NSOCKET_DESCRIPTORS > 0*/ |