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Diffstat (limited to 'nuttx/sched/sem_unlink.c')
-rw-r--r-- | nuttx/sched/sem_unlink.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/nuttx/sched/sem_unlink.c b/nuttx/sched/sem_unlink.c deleted file mode 100644 index 6fe011540..000000000 --- a/nuttx/sched/sem_unlink.c +++ /dev/null @@ -1,140 +0,0 @@ -/**************************************************************************** - * sched/sem_unlink.c - * - * Copyright (C) 2007-2009 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 <stdbool.h> -#include <semaphore.h> -#include <sched.h> -#include <queue.h> - -#include "os_internal.h" -#include "sem_internal.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: sem_unlink - * - * Description: - * This function removes the semaphore named by the input parameter 'name.' - * If the semaphore named by 'name' is currently referenced by other task, - * the sem_unlink() will have no effect on the state of the semaphore. If - * one or more processes have the semaphore open when sem_unlink() is - * called, destruction of the semaphore will be postponed until all - * references to the semaphore have been destroyed by calls of sem_close(). - * - * Parameters: - * name - Semaphore name - * - * Return Value: - * 0 (OK), or -1 (ERROR) if unsuccessful. - * - * Assumptions: - * - ****************************************************************************/ - -int sem_unlink(FAR const char *name) -{ - FAR nsem_t *psem; - int ret = ERROR; - - /* Verify the input values */ - - if (name) - { - sched_lock(); - - /* Find the named semaphore */ - - psem = sem_findnamed(name); - - /* Check if the semaphore was found */ - - if (psem) - { - /* If the named semaphore was found and if there are no - * connects to it, then deallocate it - */ - - if (!psem->nconnect) - { - dq_rem((FAR dq_entry_t*)psem, &g_nsems); - sched_free(psem); - } - - /* If one or more process still has the semaphore open, - * then just mark it as unlinked. The unlinked semaphore will - * be deleted when the final process closes the semaphore. - */ - - else - { - psem->unlinked = true; - } - ret = OK; - } - - sched_unlock(); - } - - return ret; -} |