119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
/*
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* Copyright (c) 2016, The OpenThread Authors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file
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* This file implements the tasklet scheduler.
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*/
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#include <openthread.h>
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#include <common/code_utils.hpp>
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#include <common/debug.hpp>
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#include <common/tasklet.hpp>
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namespace Thread {
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Tasklet::Tasklet(TaskletScheduler &aScheduler, Handler aHandler, void *aContext):
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mScheduler(aScheduler),
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mHandler(aHandler),
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mContext(aContext),
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mNext(NULL)
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{
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}
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ThreadError Tasklet::Post(void)
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{
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return mScheduler.Post(*this);
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}
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TaskletScheduler::TaskletScheduler(void):
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mHead(NULL),
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mTail(NULL)
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{
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}
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ThreadError TaskletScheduler::Post(Tasklet &aTasklet)
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{
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ThreadError error = kThreadError_None;
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VerifyOrExit(mTail != &aTasklet && aTasklet.mNext == NULL, error = kThreadError_Busy);
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if (mTail == NULL)
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{
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mHead = &aTasklet;
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mTail = &aTasklet;
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otSignalTaskletPending(NULL);
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}
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else
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{
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mTail->mNext = &aTasklet;
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mTail = &aTasklet;
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}
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exit:
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return error;
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}
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Tasklet *TaskletScheduler::PopTasklet(void)
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{
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Tasklet *task = mHead;
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if (task != NULL)
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{
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mHead = mHead->mNext;
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if (mHead == NULL)
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{
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mTail = NULL;
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}
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task->mNext = NULL;
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}
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return task;
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}
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bool TaskletScheduler::AreTaskletsPending(void)
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{
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return mHead != NULL;
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}
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void TaskletScheduler::RunNextTasklet(void)
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{
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Tasklet *task;
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task = PopTasklet();
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if (task != NULL)
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{
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task->RunTask();
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}
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}
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} // namespace Thread
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