2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2014-08-08 22:21:48 +02:00
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* sched/pthread/pthread_initialize.c
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2007-02-18 00:21:28 +01:00
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*
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2013-02-03 17:43:58 +01:00
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* Copyright (C) 2007-2010, 2013 Gregory Nutt. All rights reserved.
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2012-07-14 21:30:31 +02:00
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* Author: Gregory Nutt <gnutt@nuttx.org>
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2007-02-18 00:21:28 +01:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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2008-05-31 20:02:49 +02:00
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* 3. Neither the name NuttX nor the names of its contributors may be
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2007-02-18 00:21:28 +01:00
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Included Files
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2009-12-14 19:39:29 +01:00
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#include <nuttx/config.h>
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#include <stdint.h>
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2007-02-18 00:21:28 +01:00
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#include <semaphore.h>
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#include <errno.h>
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2009-12-14 19:39:29 +01:00
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2014-08-08 20:55:02 +02:00
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#include "pthread/pthread.h"
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Definitions
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Private Type Declarations
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Global Variables
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Private Variables
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Private Functions
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2007-02-18 00:21:28 +01:00
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* Public Functions
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2012-07-14 21:30:31 +02:00
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* Name: pthread_initialize
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2007-02-18 00:21:28 +01:00
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*
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* Description:
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2013-02-03 17:43:58 +01:00
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* This is an internal OS function called only at power-up boot time. It
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* no longer does anything since all of the pthread data structures have
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* been moved into the "task group"
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2007-02-18 00:21:28 +01:00
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*
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* Parameters:
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* None
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*
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* Return Value:
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* None
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*
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* Assumptions:
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*
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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void pthread_initialize(void)
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{
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}
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2008-05-31 20:02:49 +02:00
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/****************************************************************************
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2012-07-14 21:30:31 +02:00
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* Name: pthread_takesemaphore and pthread_givesemaphore
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2007-02-18 00:21:28 +01:00
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*
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* Description:
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* Support managed access to the private data sets.
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*
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* Parameters:
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* None
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*
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* Return Value:
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2008-05-31 20:02:49 +02:00
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* 0 on success or an ERROR on failure with errno value set to EINVAL.
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* Note that the errno EINTR is never returned by this function.
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2007-02-18 00:21:28 +01:00
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*
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* Assumptions:
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*
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2008-05-31 20:02:49 +02:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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int pthread_takesemaphore(sem_t *sem)
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{
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/* Verify input parameters */
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if (sem)
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{
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/* Take the semaphore */
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while (sem_wait(sem) != OK)
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{
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/* Handle the special case where the semaphore wait was
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* awakened by the receipt of a signal.
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*/
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2012-07-14 21:30:31 +02:00
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if (get_errno() != EINTR)
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2007-02-18 00:21:28 +01:00
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{
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set_errno(EINVAL);
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2007-02-18 00:21:28 +01:00
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return ERROR;
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}
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}
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return OK;
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}
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else
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{
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/* NULL semaphore pointer! */
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2012-07-14 21:30:31 +02:00
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set_errno(EINVAL);
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2007-02-18 00:21:28 +01:00
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return ERROR;
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}
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}
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int pthread_givesemaphore(sem_t *sem)
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{
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/* Verify input parameters */
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if (sem)
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{
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/* Give the semaphore */
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if (sem_post(sem) == OK)
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2008-05-31 20:02:49 +02:00
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{
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return OK;
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}
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2007-02-18 00:21:28 +01:00
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else
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{
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/* sem_post() reported an error */
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2012-07-14 21:30:31 +02:00
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set_errno(EINVAL);
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2007-02-18 00:21:28 +01:00
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return ERROR;
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}
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}
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else
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{
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/* NULL semaphore pointer! */
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2012-07-14 21:30:31 +02:00
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set_errno(EINVAL);
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2007-02-18 00:21:28 +01:00
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return ERROR;
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}
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}
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2007-02-27 22:17:21 +01:00
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