98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/****************************************************************************
|
|
* sched/environ/env_release.c
|
|
*
|
|
* Copyright (C) 2007, 2009, 2013 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>
|
|
|
|
#ifndef CONFIG_DISABLE_ENVIRON
|
|
|
|
#include <sched.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/kmalloc.h>
|
|
|
|
#include "environ/environ.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: env_release
|
|
*
|
|
* Description:
|
|
* env_release() is called only from group_leave() when the last member of
|
|
* a task group exits. The env_release() function clears the environment
|
|
* of all name-value pairs and sets the value of the external variable
|
|
* environ to NULL.
|
|
*
|
|
* Input Parameters:
|
|
* group - Identifies the task group containing the environment structure
|
|
* to be released.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Not called from an interrupt handler
|
|
*
|
|
****************************************************************************/
|
|
|
|
void env_release(FAR struct task_group_s *group)
|
|
{
|
|
DEBUGASSERT(group != NULL);
|
|
|
|
/* Free any allocate environment strings */
|
|
|
|
if (group->tg_envp)
|
|
{
|
|
/* Free the environment */
|
|
|
|
kumm_free(group->tg_envp);
|
|
}
|
|
|
|
/* In any event, make sure that all environment-related variables in the
|
|
* task group structure are reset to initial values.
|
|
*/
|
|
|
|
group->tg_envsize = 0;
|
|
group->tg_envp = NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_DISABLE_ENVIRON */
|