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5051721298
Move pthread mutex operations from kernel-space syscall interface to user-space implementations to reduce syscall overhead. Relocate mutex holder list tracking from task control block (tcb) to thread local storage (tls) to improve memory layout and cache efficiency. Add helper macros for conditional mutex implementations and update syscall interface accordingly. Signed-off-by: hujun5 <hujun5@xiaomi.com>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/****************************************************************************
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* libs/libc/pthread/pthread_mutex_init.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <pthread.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/pthread.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_mutex_init
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*
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* Description:
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* Create a mutex
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*
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* Input Parameters:
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* mutex - A reference to the mutex to be initialized
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* attr - Mutex attribute object to be used
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*
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* Returned Value:
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* 0 if successful. Otherwise, an error code.
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*
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****************************************************************************/
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int pthread_mutex_init(FAR pthread_mutex_t *mutex,
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FAR const pthread_mutexattr_t *attr)
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{
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int status;
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sinfo("mutex=%p attr=%p\n", mutex, attr);
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if (!mutex)
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{
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return EINVAL;
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}
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/* Initialize the semaphore of type mutex */
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status = mutex_init(&mutex->mutex);
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if (status < 0)
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{
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return -status;
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}
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/* Were attributes specified? If so, use them */
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#ifdef CONFIG_PTHREAD_MUTEX_TYPES
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mutex->type = attr ? attr->type : PTHREAD_MUTEX_DEFAULT;
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#endif
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#ifndef CONFIG_PTHREAD_MUTEX_UNSAFE
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mutex->flink = NULL;
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# ifdef CONFIG_PTHREAD_MUTEX_BOTH
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mutex->flags = attr && attr->robust == PTHREAD_MUTEX_ROBUST ?
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_PTHREAD_MFLAGS_ROBUST : 0;
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# else
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mutex->flags = 0;
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# endif
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#endif
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#if defined(CONFIG_PRIORITY_INHERITANCE) || defined(CONFIG_PRIORITY_PROTECT)
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if (attr)
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{
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status = mutex_set_protocol(&mutex->mutex,
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SEM_TYPE_MUTEX | attr->proto);
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if (status < 0)
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{
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mutex_destroy(&mutex->mutex);
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return -status;
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}
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# ifdef CONFIG_PRIORITY_PROTECT
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if (attr->proto == PTHREAD_PRIO_PROTECT)
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{
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status = mutex_setprioceiling(&mutex->mutex, attr->ceiling, NULL);
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if (status < 0)
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{
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mutex_destroy(&mutex->mutex);
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return -status;
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}
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}
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# endif
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}
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else
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{
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/* Set the default priority inheritance and protect flags according to
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* config flags.
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*/
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mutex_set_protocol(&mutex->mutex,
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SEM_TYPE_MUTEX | PTHREAD_MUTEX_DEFAULT_PRIO_FLAGS);
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}
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#endif
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return 0;
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}
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