9dbb9b49c6
In NuttX, the dq and the list are two different implementations of the double-linked list. Comparing to the dq, the list implementation has less branch conditions such as checking whether the head or tail is NULL. In theory and practice, the list is more friendly to the CPU pipeline. This commit changed the dq to the list in the wqueue implementation. Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
71 lines
2.6 KiB
C
71 lines
2.6 KiB
C
/****************************************************************************
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* libs/libc/wqueue/wqueue.h
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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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#ifndef __LIBS_LIBC_WQUEUE_WQUEUE_H
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#define __LIBS_LIBC_WQUEUE_WQUEUE_H
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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 <pthread.h>
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#include <nuttx/mutex.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/list.h>
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#include <nuttx/wqueue.h>
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#if defined(CONFIG_LIBC_USRWORK) && !defined(__KERNEL__)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* This structure defines the state of one user-modework queue. */
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struct usr_wqueue_s
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{
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struct list_node q; /* The queue of pending work */
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mutex_t lock; /* exclusive access to user-mode work queue */
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sem_t wake; /* The wake-up semaphore of the usrthread */
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* The state of the user mode work queue */
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extern struct usr_wqueue_s g_usrwork;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#endif /* CONFIG_LIBC_USRWORK && !__KERNEL__*/
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#endif /* __LIBS_LIBC_WQUEUE_WQUEUE_H */
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