2008-01-30 22:59:12 +01:00
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/****************************************************************************
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2020-07-27 07:46:03 +02:00
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* sched/pthread/pthread_condclockwait.c
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2007-02-18 00:21:28 +01:00
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*
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2020-04-06 00:33:44 +02:00
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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2007-02-18 00:21:28 +01:00
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*
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2020-04-06 00:33:44 +02:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2007-02-18 00:21:28 +01:00
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*
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2020-04-06 00:33:44 +02:00
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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2007-02-18 00:21:28 +01:00
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*
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2008-01-30 22:59:12 +01:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-01-30 22:59:12 +01:00
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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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2008-01-30 22:59:12 +01:00
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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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2007-02-27 22:17:21 +01:00
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#include <nuttx/compiler.h>
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2009-12-14 19:39:29 +01:00
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2009-12-14 20:30:18 +01:00
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#include <stdint.h>
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2007-02-18 00:21:28 +01:00
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#include <unistd.h>
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#include <pthread.h>
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#include <signal.h>
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#include <time.h>
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#include <errno.h>
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2013-02-06 16:43:28 +01:00
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#include <assert.h>
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2007-02-18 00:21:28 +01:00
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#include <debug.h>
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2009-12-14 20:30:18 +01:00
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2016-02-14 15:17:46 +01:00
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#include <nuttx/irq.h>
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2014-08-21 19:16:55 +02:00
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#include <nuttx/wdog.h>
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2017-10-07 18:57:09 +02:00
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#include <nuttx/signal.h>
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2016-12-10 16:08:26 +01:00
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#include <nuttx/cancelpt.h>
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2014-08-21 19:16:55 +02:00
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2014-08-09 01:53:55 +02:00
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#include "sched/sched.h"
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2014-08-08 20:55:02 +02:00
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#include "pthread/pthread.h"
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2014-08-08 22:43:02 +02:00
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#include "clock/clock.h"
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2014-08-08 20:44:44 +02:00
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#include "signal/signal.h"
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2007-02-18 00:21:28 +01:00
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2008-01-30 22:59:12 +01:00
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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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2008-01-30 22:59:12 +01:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2008-01-30 22:59:12 +01:00
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/****************************************************************************
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2020-07-27 07:46:03 +02:00
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* Name: pthread_cond_clockwait
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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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* A thread can perform a timed wait on a condition variable.
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*
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2018-03-13 16:52:27 +01:00
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* Input Parameters:
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2020-07-27 07:46:03 +02:00
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* cond - the condition variable to wait on
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2007-02-27 22:17:21 +01:00
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* mutex - the mutex that protects the condition variable
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2020-07-27 07:46:03 +02:00
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* clockid - The timing source to use in the conversion
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2007-02-27 22:17:21 +01:00
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* abstime - wait until this absolute time
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2007-02-18 00:21:28 +01:00
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*
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2018-02-01 17:00:02 +01:00
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* Returned Value:
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2017-03-26 19:22:17 +02:00
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* OK (0) on success; A non-zero errno value is returned on failure.
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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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2017-03-26 19:22:17 +02:00
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* Timing is of resolution 1 msec, with +/-1 millisecond accuracy.
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2007-02-18 00:21:28 +01:00
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*
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2008-01-30 22:59:12 +01:00
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****************************************************************************/
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2007-02-18 00:21:28 +01:00
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2020-07-27 07:46:03 +02:00
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int pthread_cond_clockwait(FAR pthread_cond_t *cond,
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2020-04-06 00:33:44 +02:00
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FAR pthread_mutex_t *mutex,
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2020-07-27 07:46:03 +02:00
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clockid_t clockid,
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2008-01-30 22:59:12 +01:00
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FAR const struct timespec *abstime)
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2007-02-18 00:21:28 +01:00
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{
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2021-12-09 08:08:01 +01:00
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irqstate_t flags;
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2022-11-15 07:37:20 +01:00
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int mypid = gettid();
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2013-02-06 16:43:28 +01:00
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int ret = OK;
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int status;
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2007-02-18 00:21:28 +01:00
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2022-06-30 19:34:24 +02:00
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sinfo("cond=%p mutex=%p abstime=%p\n", cond, mutex, abstime);
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2007-02-18 00:21:28 +01:00
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2020-07-27 07:46:03 +02:00
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/* pthread_cond_clockwait() is a cancellation point */
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2016-12-09 23:50:34 +01:00
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2020-01-02 17:49:34 +01:00
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enter_cancellation_point();
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2016-12-09 23:50:34 +01:00
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2007-02-18 00:21:28 +01:00
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/* Make sure that non-NULL references were provided. */
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if (!cond || !mutex)
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{
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ret = EINVAL;
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}
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/* Make sure that the caller holds the mutex */
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else if (mutex->pid != mypid)
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{
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ret = EPERM;
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}
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/* If no wait time is provided, this function degenerates to
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* the same behavior as pthread_cond_wait().
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*/
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else if (!abstime)
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{
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ret = pthread_cond_wait(cond, mutex);
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}
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else
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{
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2022-04-11 05:57:52 +02:00
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#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
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uint8_t mflags;
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#endif
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#ifdef CONFIG_PTHREAD_MUTEX_TYPES
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uint8_t type;
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int16_t nlocks;
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#endif
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2020-08-04 12:31:31 +02:00
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sinfo("Give up mutex...\n");
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2021-12-09 08:08:01 +01:00
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/* We must disable pre-emption and interrupts here so that
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* the time stays valid until the wait begins. This adds
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* complexity because we assure that interrupts and
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* pre-emption are re-enabled correctly.
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2020-08-04 12:31:31 +02:00
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*/
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sched_lock();
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2021-12-09 08:08:01 +01:00
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flags = enter_critical_section();
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2007-02-18 00:21:28 +01:00
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2022-04-11 05:57:52 +02:00
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/* Give up the mutex */
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2007-02-18 00:21:28 +01:00
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2022-04-11 05:57:52 +02:00
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mutex->pid = INVALID_PROCESS_ID;
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2020-04-06 00:33:44 +02:00
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#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
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2022-04-11 05:57:52 +02:00
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mflags = mutex->flags;
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2020-04-06 00:33:44 +02:00
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#endif
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#ifdef CONFIG_PTHREAD_MUTEX_TYPES
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2022-04-11 05:57:52 +02:00
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type = mutex->type;
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nlocks = mutex->nlocks;
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2020-04-06 00:33:44 +02:00
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#endif
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2022-04-11 05:57:52 +02:00
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ret = pthread_mutex_give(mutex);
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if (ret == 0)
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{
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status = nxsem_clockwait_uninterruptible(
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&cond->sem, clockid, abstime);
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if (status < 0)
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{
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ret = -status;
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}
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}
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2021-12-09 08:08:01 +01:00
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2022-04-11 05:57:52 +02:00
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/* Restore interrupts (pre-emption will be enabled
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* when we fall through the if/then/else)
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*/
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2021-12-09 08:08:01 +01:00
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2022-04-11 05:57:52 +02:00
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leave_critical_section(flags);
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2007-02-18 00:21:28 +01:00
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2022-04-11 05:57:52 +02:00
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/* Reacquire the mutex (retaining the ret). */
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2007-02-18 00:21:28 +01:00
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2022-04-11 05:57:52 +02:00
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sinfo("Re-locking...\n");
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2017-04-11 19:03:25 +02:00
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2022-04-11 05:57:52 +02:00
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status = pthread_mutex_take(mutex, NULL, false);
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if (status == OK)
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{
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mutex->pid = mypid;
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2020-04-06 00:33:44 +02:00
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#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
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2022-04-11 05:57:52 +02:00
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mutex->flags = mflags;
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2020-04-06 00:33:44 +02:00
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#endif
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#ifdef CONFIG_PTHREAD_MUTEX_TYPES
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2022-04-11 05:57:52 +02:00
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mutex->type = type;
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mutex->nlocks = nlocks;
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2020-04-06 00:33:44 +02:00
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#endif
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2022-04-11 05:57:52 +02:00
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}
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else if (ret == 0)
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{
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ret = status;
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2007-02-18 00:21:28 +01:00
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}
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2020-08-04 12:31:31 +02:00
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2021-12-09 08:08:01 +01:00
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/* Re-enable pre-emption (It is expected that interrupts
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* have already been re-enabled in the above logic)
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*/
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2020-08-04 12:31:31 +02:00
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2020-12-15 02:39:23 +01:00
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sched_unlock();
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2007-02-18 00:21:28 +01:00
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}
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2016-12-09 23:50:34 +01:00
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leave_cancellation_point();
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2016-06-12 00:42:42 +02:00
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sinfo("Returning %d\n", ret);
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2007-02-18 00:21:28 +01:00
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return ret;
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}
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