9fd1478a99
Add support for pthread_{get|set}concurrency support.
NuttX uses 1:1 threading model (every pthread is a kernel-managed thread),
so this function has no real effect on the scheduling behavior.
Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/****************************************************************************
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* libs/libc/pthread/pthread_concurrency.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 <pthread.h>
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/****************************************************************************
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* Public Data
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****************************************************************************/
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static int g_pthread_concurrency_level = 0;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_setconcurrency
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*
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* Description:
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* The pthread_setconcurrency() function informs the implementation of
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* the application's desired concurrency level.
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*
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* NuttX uses 1:1 threading model, so this function has no real effect
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* on the scheduling behavior.
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*
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* Input Parameters:
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* new_level - desired concurrency level
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*
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* Returned Value:
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* Returns 0 on success, on error it returns a nonzero error number
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*
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****************************************************************************/
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int pthread_setconcurrency(int new_level)
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{
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if (new_level < 0)
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{
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return EINVAL;
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}
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g_pthread_concurrency_level = new_level;
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return OK;
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}
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/****************************************************************************
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* Name: pthread_getconcurrency
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*
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* Description:
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* The pthread_getconcurrency() returns the value previously set by
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* pthread_setconcurrency().
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Returns the current value of concurrency level.
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*
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****************************************************************************/
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int pthread_getconcurrency(void)
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{
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return g_pthread_concurrency_level;
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}
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