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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreProcessorMask
*
* @brief This source file contains the definition of
* ::_Processor_mask_The_one_and_only and the implementation of
* _Processor_mask_Copy().
*/
/*
* Copyright (c) 2017 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/processormaskimpl.h>
const Processor_mask _Processor_mask_The_one_and_only = { .__bits[ 0 ] = 1 };
Processor_mask_Copy_status _Processor_mask_Copy(
long *dst,
size_t dst_size,
const long *src,
size_t src_size
)
{
long inclusive = 0;
long exclusive = 0;
if ( ( dst_size | src_size ) % sizeof( long ) != 0 ) {
return PROCESSOR_MASK_COPY_INVALID_SIZE;
}
while ( dst_size > 0 && src_size > 0 ) {
long bits = *src;
inclusive |= bits;
*dst = bits;
++dst;
++src;
dst_size -= sizeof( long );
src_size -= sizeof( long );
}
while ( dst_size > 0 ) {
*dst = 0;
++dst;
dst_size -= sizeof( long );
}
while ( src_size > 0 ) {
exclusive |= *src;
++src;
src_size -= sizeof( long );
}
if ( exclusive != 0 ) {
if ( inclusive != 0 ) {
return PROCESSOR_MASK_COPY_PARTIAL_LOSS;
} else {
return PROCESSOR_MASK_COPY_COMPLETE_LOSS;
}
}
return PROCESSOR_MASK_COPY_LOSSLESS;
}
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