101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/****************************************************************************
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* sched/environ/env_release.c
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*
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* Copyright (C) 2007, 2009, 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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#ifndef CONFIG_DISABLE_ENVIRON
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#include <sched.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include "environ/environ.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: env_release
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*
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* Description:
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* env_release() is called only from group_leave() when the last member of
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* a task group exits. The env_release() function clears the environment
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* of all name-value pairs and sets the value of the external variable
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* environ to NULL.
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*
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* Input Parameters:
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* group - Identifies the task group containing the environment structure
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* to be released.
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* Not called from an interrupt handler
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*
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****************************************************************************/
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void env_release(FAR struct task_group_s *group)
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{
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DEBUGASSERT(group != NULL);
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/* Free any allocate environment strings */
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if (group->tg_envp)
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{
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/* Free the environment */
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sched_ufree(group->tg_envp);
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}
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/* In any event, make sure that all environment-related varialbles in the
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* task group structure are reset to initial values.
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*/
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group->tg_envsize = 0;
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group->tg_envp = NULL;
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}
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#endif /* CONFIG_DISABLE_ENVIRON */
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