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- /****************************************************************************
- * sched/group/group_waiter.c
- *
- * Copyright (C) 2015 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 <sys/types.h>
- #include <assert.h>
- #include "nuttx/sched.h"
- #include "group/group.h"
- #if defined(CONFIG_SCHED_WAITPID) && !defined(CONFIG_SCHED_HAVE_PARENT)
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: group_addwaiter
- *
- * Description:
- * Increment the number of instances of waitpid that are waiting for this
- * group to exit.
- *
- * Assumptions:
- * Caller has assured mutually exclusive access to the group.
- *
- ****************************************************************************/
- void group_addwaiter(FAR struct task_group_s *group)
- {
- group->tg_nwaiters++;
- DEBUGASSERT(group->tg_nwaiters > 0);
- }
- /****************************************************************************
- * Name: group_addwaiter
- *
- * Description:
- * Decrement the number of instances of waitpid that are waiting for this
- * group to exit. If the count goes to zero and deletion is pending, the
- * call group_free to release the dangling resources.
- *
- * Assumptions:
- * Caller has assured mutually exclusive access to the group.
- *
- ****************************************************************************/
- void group_delwaiter(FAR struct task_group_s *group)
- {
- DEBUGASSERT(group->tg_nwaiters > 0);
- group->tg_nwaiters--;
- if (group->tg_nwaiters == 0 && (group->tg_flags & GROUP_FLAG_DELETED) != 0)
- {
- /* Release the group container (all other resources have already been
- * freed).
- */
- sched_kfree(group);
- }
- }
- #endif /* CONFIG_SCHED_WAITPID && !CONFIG_SCHED_HAVE_PARENT */
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