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311f42bbac
Replace the pipe() macro definition with a proper function implementation to improve POSIX compliance and debugging capabilities. The new pipe() function serves as a wrapper around pipe2() with flags set to 0. Changes include: - Convert pipe() from macro to function declaration in unistd.h - Add lib_pipe.c implementation file with proper function documentation - Update build system files (CMakeLists.txt and Make.defs) to include the new source file when CONFIG_PIPES is enabled - Add pipe() entry to libc.csv for symbol tracking This change allows for better debugging, proper symbol resolution, and follows NuttX coding standards for library function implementations. Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/****************************************************************************
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* libs/libc/unistd/lib_pipe.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <unistd.h>
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#if CONFIG_DEV_PIPE_SIZE > 0
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pipe
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*
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* Description:
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* pipe() creates a pair of file descriptors, pointing to a pipe inode,
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* and places them in the array pointed to by 'fd'. fd[0] is for reading,
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* fd[1] is for writing.
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*
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* Input Parameters:
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* fd[2] - The user provided array in which to catch the pipe file
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* descriptors
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*
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* Returned Value:
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* 0 is returned on success; -1 (ERROR) is returned on a failure
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* with the errno value set appropriately.
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*
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****************************************************************************/
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int pipe(int fd[2])
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{
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return pipe2(fd, 0);
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}
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#endif /* CONFIG_DEV_PIPE_SIZE > 0 */
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