8b67944c75
simplify the code logic and reduce memory a little bit Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/****************************************************************************
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* sched/sched/sched_foreach.c
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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 <sched.h>
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#include <nuttx/irq.h>
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#include "sched/sched.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxsched_foreach
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*
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* Description:
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* Enumerate over each task and provide the TCB of each task to a user
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* callback functions.
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*
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* NOTE: This function examines the TCB and calls each handler within a
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* critical section. However, that critical section is released and
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* reacquired for each TCB. When it is released, there may be changes in
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* tasking. If the caller requires absolute stability through the
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* traversal, then the caller should establish the critical section BEFORE
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* calling this function.
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*
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* Input Parameters:
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* handler - The function to be called with the TCB of
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* each task
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void nxsched_foreach(nxsched_foreach_t handler, FAR void *arg)
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{
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irqstate_t flags;
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int ndx;
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/* Visit each active task */
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flags = enter_critical_section();
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for (ndx = 0; ndx < g_npidhash; ndx++)
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{
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/* This test and the function call must be atomic */
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if (g_pidhash[ndx])
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{
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handler(g_pidhash[ndx], arg);
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}
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}
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leave_critical_section(flags);
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}
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