diff options
Diffstat (limited to 'nuttx/sched/sem_destroy.c')
-rw-r--r-- | nuttx/sched/sem_destroy.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/nuttx/sched/sem_destroy.c b/nuttx/sched/sem_destroy.c deleted file mode 100644 index 90a2b95ef..000000000 --- a/nuttx/sched/sem_destroy.c +++ /dev/null @@ -1,126 +0,0 @@ -/**************************************************************************** - * lib/semaphore/sem_destroy.c - * - * Copyright (C) 2007-2009, 2011 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 <semaphore.h> -#include <errno.h> - -#include "sem_internal.h" - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: sem_destroy - * - * Description: - * This function is used to destroy the un-named semaphore indicated by - * 'sem'. Only a semaphore that was created using sem_init() may be - * destroyed using sem_destroy(); the effect of calling sem_destroy() with - * a named semaphore is undefined. The effect of subsequent use of the - * semaphore sem is undefined until sem is re-initialized by another call - * to sem_init(). - * - * The effect of destroying a semaphore upon which other processes are - * currently blocked is undefined. - * - * Parameters: - * sem - Semaphore to be destroyed. - * - * Return Value: - * 0 (OK), or -1 (ERROR) if unsuccessful. - * - * Assumptions: - * - ****************************************************************************/ - -int sem_destroy (FAR sem_t *sem) -{ - /* Assure a valid semaphore is specified */ - - if (sem) - { - /* There is really no particular action that we need - * take to destroy a semaphore. We will just reset - * the count to some reasonable value (1) and release - * ownership. - * - * Check if other threads are waiting on the semaphore. - * In this case, the behavior is undefined. We will: - * leave the count unchanged but still return OK. - */ - - if (sem->semcount >= 0) - { - sem->semcount = 1; - } - - /* Release holders of the semaphore */ - - sem_destroyholder(sem); - return OK; - } - else - { - errno = -EINVAL; - return ERROR; - } -} |