forked from Imagelibrary/rtems
80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
/**
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* @file
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*
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* @ingroup RTEMSScoreProcessorMask
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*
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* @brief This source file contains the definition of
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* ::_Processor_mask_The_one_and_only and the implementation of
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* _Processor_mask_Copy().
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*/
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/*
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* Copyright (c) 2017 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems/score/processormask.h>
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const Processor_mask _Processor_mask_The_one_and_only = { .__bits[ 0 ] = 1 };
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Processor_mask_Copy_status _Processor_mask_Copy(
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long *dst,
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size_t dst_size,
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const long *src,
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size_t src_size
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)
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{
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long inclusive = 0;
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long exclusive = 0;
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if ( ( dst_size | src_size ) % sizeof( long ) != 0 ) {
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return PROCESSOR_MASK_COPY_INVALID_SIZE;
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}
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while ( dst_size > 0 && src_size > 0 ) {
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long bits = *src;
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inclusive |= bits;
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*dst = bits;
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++dst;
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++src;
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dst_size -= sizeof( long );
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src_size -= sizeof( long );
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}
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while ( dst_size > 0 ) {
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*dst = 0;
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++dst;
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dst_size -= sizeof( long );
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}
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while ( src_size > 0 ) {
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exclusive |= *src;
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++src;
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src_size -= sizeof( long );
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}
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if ( exclusive != 0 ) {
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if ( inclusive != 0 ) {
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return PROCESSOR_MASK_COPY_PARTIAL_LOSS;
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} else {
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return PROCESSOR_MASK_COPY_COMPLETE_LOSS;
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}
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}
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return PROCESSOR_MASK_COPY_LOSSLESS;
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}
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