74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
/* offload to fiber kernel service */
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/*
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* Copyright (c) 1997-2010, 2013-2014 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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#include <micro_private.h>
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#include <sections.h>
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/**
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*
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* @brief Process an "offload to fiber" request
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*
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* This routine simply invokes the requested function from within the context
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* of the K_swapper() fiber and saves the result.
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*
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* @return N/A
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*/
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void _k_offload_to_fiber(struct k_args *A)
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{
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A->Args.u1.rval = (*A->Args.u1.func)(A->Args.u1.argp);
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}
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/**
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*
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* @brief Issue a custom call from within K_swapper()
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*
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* @func: function to call from within K_swapper()
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* @argp: argument to pass to custom function
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*
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* This routine issues a request to execute a function from within the context
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* of the K_swapper() fiber.
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*
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* @return return value from custom <func> call
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*/
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int task_offload_to_fiber(int (*func)(), void *argp)
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{
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struct k_args A;
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A.Comm = _K_SVC_OFFLOAD_TO_FIBER;
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A.Args.u1.func = func;
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A.Args.u1.argp = argp;
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KERNEL_ENTRY(&A);
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return A.Args.u1.rval;
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}
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