diff options
Diffstat (limited to 'nuttx/lib/semaphore/sem_getvalue.c')
-rw-r--r-- | nuttx/lib/semaphore/sem_getvalue.c | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/nuttx/lib/semaphore/sem_getvalue.c b/nuttx/lib/semaphore/sem_getvalue.c deleted file mode 100644 index 31c6bb7e0..000000000 --- a/nuttx/lib/semaphore/sem_getvalue.c +++ /dev/null @@ -1,108 +0,0 @@ -/**************************************************************************** - * lib/semaphore/sem_getvalue.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 <sys/types.h> -#include <semaphore.h> -#include <errno.h> - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Function: sem_getvalue - * - * Description: - * This function updates the location referenced by 'sval' argument to - * have the value of the semaphore referenced by 'sem' without effecting - * the state of the semaphore. The updated value represents the actual - * semaphore value that occurred at some unspecified time during the call, - * but may not reflect the actual value of the semaphore when it is - * returned to the calling task. - * - * If 'sem' is locked, the value return by sem_getvalue() will either be - * zero or a negative number whose absolute value represents the number - * of tasks waiting for the semaphore. - * - * Parameters: - * sem - Semaphore descriptor - * sval - Buffer by which the value is returned - * - * Return Value: - * 0 (OK), or -1 (ERROR) if unsuccessful - * - * Assumptions: - * - ****************************************************************************/ - -int sem_getvalue(FAR sem_t *sem, FAR int *sval) -{ - if (sem && sval) - { - *sval = sem->semcount; - return OK; - } - else - { - set_errno(EINVAL); - return ERROR; - } -} |