75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/* "do nothing" kernel service */
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/*
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* Copyright (c) 1997-2014 Wind River Systems, Inc.
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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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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* 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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DESCRIPTION
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This module provides a "do nothing" kernel service.
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This service is primarily used by other kernel services that need a way to
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resume the execution of a kernel request that could not be completed in a
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single invocation of the K_swapper fiber. However, it can also be used by
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a task to measure the overhead involved in issuing a kernel service request.
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*/
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#include <minik.h>
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#include <toolchain.h>
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#include <sections.h>
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/*******************************************************************************
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*
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* _k_nop - perform "do nothing" kernel request
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*
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* RETURNS: N/A
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*/
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void _k_nop(struct k_args *A)
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{
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ARG_UNUSED(A);
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}
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/*******************************************************************************
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*
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* _task_nop - "do nothing" kernel request
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*
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* This routine is a request for the K_swapper to run a "do nothing" routine.
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*
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* RETURNS: N/A
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*/
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void _task_nop(void)
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{
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struct k_args A;
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A.Comm = NOP;
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KERNEL_ENTRY(&A);
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}
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